All Tools

View as:

calculator

Absolute Difference Calculator, |a - b| and Percent✦ NewFind the absolute difference between two numbers, which is larger, and the gap as a percent of each number and of their mean. Shows the working. Free, private, runs in your browser.
Age Calculator★ FeaturedCalculate your exact age in years, months, and days, and see how long until your next birthday.
Area Calculator★ FeaturedCalculate the area of common geometric shapes and the surface area and volume of 3D solids, right in your browser.
BAC Calculator: Blood Alcohol Content Estimate✦ NewEstimate blood alcohol content with the Widmark formula from body weight, sex, drinks and time since drinking. Shows peak and current BAC in % and ‰ and the time to 0.08%, 0.05% and zero. It cannot tell you that you are safe to drive.
Binary Calculator: Add, Subtract, AND, OR, XOR, Shift✦ NewAdd, subtract, multiply and divide binary or hex numbers of any length, and apply AND, OR, XOR, NAND, NOR, NOT, shifts, rotations, bit counts and shuffles. Results in binary, hex and decimal. Nothing is uploaded.
BMI Calculator★ FeaturedCalculate your Body Mass Index (BMI) with its WHO class, from thinness grades to obesity classes, in metric or US units.
Body Fat Calculator: US Navy, BMI and Army Methods✦ NewEstimate body fat percentage with the US Navy tape method, a BMI-based formula or the US Army 2023 one-site tape test, in metric or US units. Shows fat mass, lean mass and the ACE category. Nothing is uploaded.
Body Surface Area Calculator: Mosteller, Du Bois, BSA✦ NewEstimate body surface area in square metres from weight and height with the Mosteller, Du Bois, Haycock, Gehan and George, and Boyd formulas side by side, in metric or US units. Nothing is uploaded.
Body Type Calculator: Body Shape and Waist-to-Hip Ratio✦ NewFind your body shape (hourglass, bottom or top hourglass, spoon, triangle, inverted triangle, rectangle) from bust, waist, high hip and hips with the FFIT rules, plus the waist-to-hip ratio against WHO thresholds. Nothing is uploaded.
Bra Size Calculator: US, UK, EU, FR and AU Sizes✦ NewFind your bra size from under-bust and bust measurements in cm or inches. Band to the nearest even inch, cup by the inch difference, EU and FR by EN 13402, AU bands and sister sizes. Nothing is uploaded.
BTU Calculator: Air Conditioner Size for a Room✦ NewFind the cooling BTU per hour, tons and kilowatts a room needs from its size, insulation, sun, occupants and kitchen. Add a temperature rise to get a heating load too.
Business Days Calculator: Add Days or Count Workdays✦ NewAdd or subtract business days from any date, or count the working days between two dates. Skips weekends and, if you choose, US federal or UK bank holidays and your own days off.
Calorie Calculator: BMR, TDEE and Goal Calories✦ NewEstimate your BMR, maintenance calories (TDEE) and daily calories to lose or gain 0.25, 0.5 or 1 kg a week with the Mifflin-St Jeor, revised Harris-Benedict or Katch-McArdle equation, in kcal or kJ, metric or US units. Nothing is sent anywhere.
Calories Burned Calculator: MET Values for 60 Activities✦ NewEstimate the calories an activity burns from its MET value, your weight in kg or lb and the duration. Search 60 activities from the 2011 Compendium of Physical Activities, each with its code, or enter your own MET. Runs in your browser; nothing is sent.
Compound Interest Calculator with Monthly Deposits✦ NewSee how savings grow with compound interest. Enter a starting amount, rate, years, compounding frequency and regular deposits to get the final balance, total interest and a year-by-year table.
Concrete Calculator✦ NewFind how much concrete a slab, footing, column, tube, curb and gutter or steps need. Mix units per field, add a waste allowance and get cubic yards, cubic metres, litres, 40 to 80 lb bags, truck-ready totals and a cost estimate.
CRC Calculator: CRC-8, CRC-16, CRC-32, CRC-64 Online✦ NewCalculate CRC-8, CRC-16, CRC-32 and CRC-64 checksums of text, hex bytes or a file in your browser. Every common preset from the CRC RevEng catalogue at once, plus custom models. Nothing is uploaded.
Date / Duration Calculator★ FeaturedCalculate dates by adding or subtracting years, months, weeks, days, hours, minutes, and seconds. Also calculate the difference between two dates and business days.
Days Until Calculator: Countdown to Any Date✦ NewCount the days, weeks and months until any date, a holiday such as Christmas, New Year or Easter, or your next birthday, with a live countdown and the weekday it falls on.
Density Calculator: Mass, Volume and ρ✦ NewSolve density, mass or volume from the other two. Switch units such as kg/m³, g/cm³ and lb/ft³, see the formula ρ = m / V and every step, free and private in your browser.
Depreciation Calculator✦ NewCalculate depreciation with straight line, declining balance, double declining balance, sum-of-years digits or units of production. Get a year-by-year book value schedule, handle a partial first year, and copy it as CSV.
Digit Tools: Digit Sum, Reverse, Sort, Palindromes✦ NewApply one digit operation to a list of integers of any size: digit sum and product, increment, delete, replace, reverse, shuffle or sort digits, palindromes, sign, thousands separators, chunks and fancy Unicode digits. Results one per line. Nothing is uploaded.
Discount Calculator: Sale Price and Percent Off✦ NewWork out the sale price after a percentage or fixed discount, stack two discounts, find the percent off between two prices and add sales tax. Shows how much you save.
Due Date Calculator: Pregnancy Due Date and Weeks✦ NewEstimate your baby's due date from the first day of your last period, the conception date or an IVF transfer date. See how many weeks pregnant you are, your trimester and key milestones.
E = mc² Calculator: Mass-Energy Equivalence✦ NewSolve energy or mass with E = mc². Use joules, kWh, eV or tonnes of TNT for energy and kg, g or atomic mass units for mass, with c fixed at 299,792,458 m/s. Free and private in your browser.
Elastic Potential Energy Calculator: U = ½kx²✦ NewSolve spring energy, spring constant or stretch with U = ½kx². Use joules, kJ or ft·lbf and N/m, N/cm or lbf/in, with every step shown. Free and private in your browser.
Exponent Calculator: Powers, Logs and Roots✦ NewRaise a number to any power, solve for the exponent or find the n-th root. Handles negative and fractional exponents, exact big integers and scientific notation, free and private in your browser.
Force Calculator: F = m × a (Newton's 2nd Law)✦ NewSolve force, mass or acceleration from the other two with Newton's second law, F = m·a. Pick units such as N, lbf, m/s² and g, and see each step. Free and private.
Fraction Calculator: Add, Simplify, Mixed Numbers✦ NewAdd, subtract, multiply and divide fractions, mixed numbers and decimals exactly, with the least common denominator and every step shown. Get the simplified fraction, mixed number and repeating decimal, or create Unicode fractions like ½ and ²²⁄₇. Nothing is uploaded.
Friction Calculator: Ff = μ × N✦ NewSolve friction force, coefficient of friction or normal force with Ff = μN. Includes presets for rubber, steel, wood, glass, ice and Teflon, plus a flat and incline helper. Free and private in your browser.
GCD and LCM Calculator with Euclidean Steps✦ NewFind the greatest common divisor and least common multiple of two or more integers of any size, with every Euclidean algorithm step and Bézout coefficients. Exact, free and private in your browser.
GFR Calculator: eGFR by CKD-EPI 2021 and Schwartz✦ NewEstimate kidney function from serum creatinine in mg/dL or µmol/L with the race-free CKD-EPI 2021 equation for adults or the bedside Schwartz equation for children, and see the KDIGO G1 to G5 category. Nothing is uploaded.
Golden Ratio Calculator✦ NewCalculate the golden ratio proportions. Find the larger part, smaller part, or total length.
GPA Calculator✦ NewCalculate your Grade Point Average (GPA) based on course credits and letter grades.
Gravel Calculator✦ NewEstimate gravel for a driveway, path or drainage bed. Enter the area and depth in any units to get cubic yards, weight in US tons or tonnes at an editable density, truck loads and an optional cost.
Gravitational Potential Energy Calculator: U = mgh✦ NewSolve potential energy, mass, gravity or height with U = mgh. Pick Earth, Moon, Mars, Jupiter and more, in joules, kJ or ft·lbf. Free and private, runs in your browser.
Gross Pay Calculator, Hourly and Salary, Free and Private✦ NewCalculate gross pay from an hourly rate with overtime and double time, or from a salary. See pay per period, month and year, plus bonus and commission, before any tax.
Height Calculator: Predict a Child's Adult Height✦ NewPredict a child's adult height from the parents' heights by the mid-parental method, with its ±8.5 cm target range, plus the twice-the-height-at-age-2 rule. Enter cm or feet and inches. Nothing is uploaded.
Hooke's Law Calculator: F = k × x✦ NewSolve spring force, spring constant or displacement with F = kx. Use N/m, N/cm or lbf/in and m, cm, mm or in, with the sign explained. Free and private in your browser.
Hourly to Salary Calculator✦ NewConvert an hourly wage to an annual salary, or easily find weekly, monthly, and daily rates based on your work schedule.
Hours Calculator: Time Between Two Times✦ NewCalculate the hours and minutes between a start and an end time, overnight shifts included, minus unpaid breaks. Shows the result as hours and minutes and as decimal hours for payroll.
Ideal Gas Law Calculator: PV = nRT✦ NewSolve pressure, volume, moles or temperature with PV = nRT. Use atm, kPa, psi, litres, °C, °F or K and see the number of molecules. Free and private in your browser.
Ideal Weight Calculator: Robinson, Miller, Devine, Hamwi✦ NewEstimate your ideal body weight by the Robinson, Miller, Devine and Hamwi formulas side by side, with the healthy weight range for your height from BMI 18.5 to 24.9. Centimetres or feet and inches, results in kg and lb. Nothing is uploaded.
Impulse Calculator: J = F·Δt and J = m·Δv✦ NewSolve impulse from force and time, or from a change in momentum, m(v2 − v1). Solve any missing value, with each step shown. Free and private in your browser.
Kinetic Energy Calculator: KE = ½mv²✦ NewSolve kinetic energy, mass or speed with KE = ½mv². Use m/s, km/h or mph and joules, kJ or kWh, and see each step. Free and private, runs in your browser.
Lean Body Mass Calculator: Boer, James, Hume, Peters✦ NewEstimate lean body mass from sex, age, weight and height with the Boer, James and Hume formulas side by side, or the Peters formula for children under 14. Shows kg, lb and implied body fat. Nothing is uploaded.
Loan Calculator★ FeaturedCalculate your monthly payments, total interest, and amortization schedule for loans and mortgages.
Macro Calculator: Protein, Carbs and Fat in Grams✦ NewSplit a daily calorie target, typed or estimated from your details, into grams of protein, carbohydrate and fat with balanced, low-fat, low-carb, high-protein or custom percentages, beside the AMDR ranges in grams. Nothing is sent anywhere.
Matrix Calculator: Inverse, Determinant, Transpose✦ NewFind the exact inverse, determinant or transpose of a matrix up to 10 × 10 with integers, decimals or fractions, shown as fractions or decimals. Also generates identity matrices, random integer matrices and random vectors. Nothing is uploaded.
Molecular Weight Calculator: Molar Mass of Any Formula✦ NewType a chemical formula such as Ca(OH)2 or CuSO4·5H2O and get its molar mass in g/mol, with the mass and percent of each element. Free and private in your browser.
Momentum Calculator: p = m × v✦ NewSolve momentum, mass or velocity with p = m·v. Choose kg·m/s, N·s or lb·ft/s and see the formula with each step. Free and private, runs in your browser.
Mulch Calculator✦ NewWork out how much mulch a garden bed needs. Depth starts at 3 inches; get cubic yards, bags of 2 and 3 cubic feet, truck loads, an optional cost, and a table of the area one cubic yard covers at each depth.
Number List CalculatorSoonCalculate the sum, mean, median, mode, max, min, and count of a list of numbers.
Number List Tools: Sum, Round, Filter, Analyse✦ NewApply one operation to a list of numbers: sum, product, running totals, rounding with six modes, truncate, increment, enumerate, join, even and odd, comparison filters, integer analysis, rewrite as a sum, or extract numbers from text. Exact, nothing is uploaded.
One Rep Max Calculator: 1RM by 7 Formulas + % Table✦ NewEstimate your one-rep max from a weight and 1 to 12 reps with the Epley, Brzycki, Lander, Lombardi, Mayhew, O'Conner and Wathan equations side by side, their average, and a 50 to 100 percent training table. Kilograms or pounds. Nothing is sent.
Online Timer and Stopwatch: Countdown, Alarm, Laps✦ NewA free online timer and stopwatch in one page. Count down from any time with presets and an alarm, or time laps to the hundredth of a second. Keeps time accurately in a background tab.
Ovulation Calculator: Fertile Window and Ovulation Day✦ NewEstimate your fertile window, ovulation day and next period for the next six cycles from the first day of your last period, your cycle length and luteal phase. Runs in your browser; nothing is sent.
Pace Calculator: Running Pace, Time, Distance and Splits✦ NewWork out running pace, finishing time or distance from the other two, in km, miles or metres or for a 5K, 10K, half marathon or marathon. Pace per km and mile, km/h and mph, and a split table. Nothing is sent.
Paint Calculator: Gallons, Cans and Cost for a Room✦ NewWork out how much paint a room needs. Add each wall or the perimeter, subtract doors and windows, set the coats, and get gallons or litres, suggested cans and cost.
Pascal's Triangle Calculator, Rows 0 to 60, C(n,k)✦ NewBuild Pascal's triangle up to 60 rows with exact numbers, hover any cell to see C(n,k), copy it as text or CSV, and compute a binomial coefficient for n up to 1000.
Percentage Calculator★ FeaturedWork out percentages, discounts, markups, and percentage changes with ease.
Pixels to PPI Calculator: Pixel Density and Dot Pitch✦ NewCalculate PPI from a resolution and screen diagonal in inches or cm. See dot pitch, total pixels and aspect ratio, or work backwards from PPI to find the resolution.
Pregnancy Weight Gain Calculator: IOM Guidelines by Week✦ NewSee how much weight to gain in pregnancy by the IOM 2009 guidelines, from your pre-pregnancy BMI, for one baby or twins, with the range for your current week and your gain so far. Metric or US units. Nothing is uploaded.
Pressure Calculator: P = F / A✦ NewSolve pressure, force or area from the other two. Use Pa, kPa, bar, psi or atm and see the formula P = F / A with each step. Free and private, runs in your browser.
Prime Factorization Calculator: Factors and Divisors✦ NewWrite any whole number up to 60 digits as a product of prime powers, list all of its divisors with their count and sum, and see the factor tree and closest factor pair. Free and private in your browser.
Road Base Calculator✦ NewEstimate road base, crusher run or crushed stone for a driveway, shed pad or paver bed. Includes a 20 percent compaction allowance, weight at an editable density, truck loads and an optional cost.
Roofing Calculator: Squares, Shingle Bundles and Cost✦ NewEstimate a roof from the building size, overhang and pitch. Get roof area, squares with waste, shingle bundles, underlayment rolls, nails and cost, in feet or metres.
Sleep Calculator: Best Bedtime and Wake-Up Time✦ NewFind when to go to bed or wake up so you finish a full 90-minute sleep cycle. Allows for the time it takes to fall asleep and shows recommended sleep by age. Runs in your browser; nothing is sent.
Stair Calculator: Rise, Run, Stringer and Angle✦ NewLay out a stair from the total rise. Get the number of risers and treads, riser and tread sizes, total run, stringer length and angle, with warnings against residential code limits.
Tank Volume Calculator✦ NewFind the capacity of a vertical, horizontal, rectangular, capsule, oval or cone-bottom tank, and the volume at any fill height. Results in US gallons, imperial gallons, litres, cubic feet and cubic metres.
Target Heart Rate Calculator: Max HR and Karvonen Zones✦ NewFind your maximum heart rate by 220 − age and the Tanaka formula, five training zones by percent of maximum or the Karvonen heart rate reserve method, and the AHA moderate and vigorous bands. Runs in your browser; nothing is sent.
Tile Calculator: How Many Tiles and Boxes to Buy✦ NewFind how many tiles and boxes a floor or wall needs. Enter the area, tile size and grout gap to get the tile count with waste, boxes, covered area and cost.
Time Calculator: Add and Subtract Hours and Minutes✦ NewAdd or subtract hours, minutes and seconds, or total a list of durations such as 1:45 + 2:30. Shows the result as h:mm:ss, in decimal hours and in total minutes and seconds.
Tip Calculator: Split the Bill and Tip✦ NewWork out the tip and split the bill between any number of people. Pick a tip percentage, tip before or after tax and round each share up, then see the tip, total and amount per person.
Topsoil Calculator✦ NewCalculate topsoil for a lawn, raised bed or garden. Get cubic yards, weight in US tons or tonnes, bags of 0.75, 1, 1.5 cubic feet or 40 lb, truck loads and an optional cost from any mix of units.
Unit Price Calculator✦ NewCompare unit prices of multiple products to find the best value. Enter price and quantity for up to 3 products to see savings percentages and identify the cheapest option.
USD Inflation Calculator, 1913 to Latest Year✦ NewFind what a US dollar amount from any year is worth in another year using BLS CPI-U annual averages. See cumulative inflation, the average yearly rate and the CPI values used. Runs in your browser.
Wavelength Calculator✦ NewCalculate wavelength, frequency, or velocity of a wave using the wave equation v = λ × f.
Week Number Calculator: ISO and US Week of the Year✦ NewFind the week number of any date in the ISO 8601 system and the US Sunday-start system, see the dates of that week, and list every week of a year with its start and end.
Weight Calculator: W = m × g, Any Planet✦ NewFind weight, mass or gravity with W = m·g. Choose Earth, Moon, Mars, Jupiter and more, and see your weight on every planet at once. Free and private in your browser.
Work Calculator: W = F × d × cos θ✦ NewSolve work, force, distance or angle with W = F·d·cos θ. Pick joules, kJ, ft·lbf or kWh and see every step of the substitution. Free and private in your browser.

converter

Acceleration ConverterSoonConvert between meters per second squared, g-force, and other acceleration units.
Angle ConverterSoonConvert between degrees, radians, and other angle units.
Area ConverterSoonConvert between square meters, acres, square feet, and other area units.
Base32, Base58 and Hex Encoder and Decoder Online✦ NewEncode text or a file as Base32, Base32hex, Base58, Base58Check or hex, and decode them back, in your browser. Decoding ignores spaces and case, verifies Base58Check checksums and names the first bad character. Nothing is uploaded.
Base64 Encoder and Decoder, Free and Private✦ NewEncode text or files to Base64 and decode Base64 back to text or a file in your browser. URL-safe alphabet, line wrapping, data URLs. Nothing is uploaded.
CBOR Encoder and Decoder: JSON to CBOR and Back✦ NewEncode JSON to CBOR as hex or Base64 and decode CBOR hex, Base64 or files to JSON or diagnostic notation in your browser. RFC 8949, exact 64-bit integers, deterministic encoding. Nothing is uploaded.
Code Formatter for JS, TS, CSS, HTML, Markdown, YAML✦ NewFormat JavaScript, TypeScript, JSON, CSS, SCSS, Less, HTML, Markdown and YAML with Prettier in your browser. Auto-detect the language, set the indent, quotes and width. Errors show the line and column. Nothing is uploaded.
CSS Minifier and Beautifier, Free and Private✦ NewMinify CSS to save bytes, or beautify it with one declaration per line. Strings, urls, custom properties and calc() are kept intact, and errors show the line and column. Nothing is uploaded.
Data ConverterSoonConvert between bytes, bits, megabytes, and other digital data units.
Encryption Tool: AES, DES, Triple DES, RC4 Online✦ NewEncrypt and decrypt text with AES (GCM, CBC, CTR, CFB, ECB), DES, Triple DES, Speck, RC4 or XXTEA, using an OpenSSL-compatible passphrase or a raw key and IV. Base64 or hex output. Nothing is uploaded.
Force ConverterSoonConvert between newtons, pound-force, and other force units.
Fuel Economy Converter: MPG, km/L and L/100 km✦ NewConvert fuel economy between MPG (US), MPG (UK), km/L, L/100 km, mi/L and km/gal. See every unit at once, the inverse L/100 km formula and a table of common values.
German Grade Converter: GPA and % to German Grade✦ NewEstimate your German grade from a US GPA or a percentage with the modified Bavarian formula. See the German term, pass or fail, the formula and tables. Scales are editable.
Hex to RGB Converter with Alpha, Free and Private✦ NewConvert hex colour codes to rgb() and rgba() and back in your browser, including #RGBA and #RRGGBBAA, with percentages, HSL, swatch previews and a colour picker. Nothing is uploaded.
HTML Entity Encoder and Decoder, Free and Private✦ NewEncode text as HTML entities and decode named, decimal and hex character references back to text in your browser. Special characters only, non-ASCII or everything, decimal or hex. Nothing is uploaded.
HTML Formatter, Indent and Beautify HTML, Private✦ NewIndent messy or one-line HTML in your browser. Choose 2 spaces, 4 spaces or tabs. Only whitespace changes, and pre, textarea, script and style content is kept exactly. Nothing is uploaded.
HTML Minifier, Shrink HTML and See Bytes Saved✦ NewRemove the whitespace and comments HTML does not need and see how many bytes you saved. Four options, and pre, textarea, script and style content is kept exactly. Nothing is uploaded.
Images to PDF Converter: JPG, PNG, WebP to PDF✦ NewTurn JPG, PNG, WebP, AVIF, BMP and GIF pictures into PDF files in your browser, one per image or combined into a single document. Nothing is uploaded.
IP Address Converter: IPv4 and IPv6 to Binary and Hex✦ NewConvert IPv4 and IPv6 addresses to binary, hex and decimal and back in your browser, one per line. RFC 5952 canonical IPv6 output and a clear reason for every bad line. Nothing is uploaded.
JSON Compare: Find Differences Between Two JSON Files✦ NewCompare two JSON documents by structure in your browser. See every added, removed, changed and type-changed value with its path, ignore key or array order, and get a summary count. Nothing is uploaded.
JSON Formatter and Validator, Free and Private✦ NewFormat, minify and validate JSON in your browser. Pick 2 spaces, 4 spaces or tabs, sort keys, and see errors with the line, column and offending text. Big numbers stay exact. Nothing is uploaded.
JSON Viewer, Collapsible Tree and Search, Private✦ NewOpen JSON as a collapsible tree in your browser. Expand or collapse branches, search keys, and copy any value or its path. Big numbers stay exact and long arrays load in pages. Nothing is uploaded.
JWT Decoder and Verifier, Free and Private✦ NewDecode a JSON Web Token in your browser, read its claims and expiry, and optionally verify the signature with HS, RS or ES keys. Tokens and keys never leave your device.
Length ConverterSoonConvert between meters, feet, inches, miles, and other length units.
Mass ConverterSoonConvert between kilograms, pounds, ounces, and other mass units.
Momentum ConverterSoonConvert between different momentum units.
Morse Code Translator: Text to Morse and Back, With Audio✦ NewTranslate text to International Morse code and back in your browser, following ITU-R M.1677-1. Choose dot, dash and separator styles, use prosigns, play the code as a tone or flashing light at 5 to 40 WPM, and save a WAV file. Nothing is uploaded.
Number Base Converter: Binary, Hex, Octal, Decimal✦ NewConvert whole numbers of any length exactly between binary, octal, decimal, hex and any base from 2 to 36, with BCD, Gray code, negabinary and two's complement. Runs in your browser. Nothing is uploaded.
Number to Words Converter: Numbers to English Words✦ NewWrite any number as English words, up to 66 digits, with decimals, an optional British "and", ordinal words or cheque style, and turn number words back into digits. Nothing is uploaded.
Office to PDF Converter: Word, Excel, PowerPoint to PDF✦ NewConvert Word, Excel, PowerPoint and OpenDocument files to PDF. Your file is converted on our EU server in memory, returned to you, and never stored.
PDF Merger: Combine PDF Files into One, Free and Private✦ NewMerge several PDF files into one document in your browser. Reorder the files, see their page counts and download the merged PDF. Nothing is uploaded.
PDF Splitter: Split or Extract PDF Pages, Free and Private✦ NewSplit a PDF into single pages, cut it into custom page ranges or extract chosen pages into one file, all in your browser. Nothing is uploaded.
Pressure ConverterSoonConvert between pascals, bars, psi, and other pressure units.
Roman Numeral Converter: Numbers to Roman and Back✦ NewConvert numbers to Roman numerals and Roman numerals to numbers, from 1 to 3,999 or up to 3,999,999 with the overline. Strict validation, additive forms, decimal or hex input. Nothing is uploaded.
Scientific Notation Converter: E and Engineering✦ NewConvert numbers to and from scientific notation, E notation and engineering notation with exact significant-figure rounding, or write them as powers of two with the binary significand and hex float. Free and private in your browser.
Shoe Size Converter: US, UK, EU, Mondopoint and JP✦ NewConvert shoe sizes for men, women and children between US, UK, EU, Mondopoint and Japanese sizes through the foot length, with full size charts. Brands differ by up to a size. Nothing is uploaded.
Speed ConverterSoonConvert between km/h, mph, m/s, knots, and feet per second.
Syntax Highlighter: Code to HTML with Inline Styles✦ NewHighlight JavaScript, Python, SQL, HTML, CSS and 13 more languages with auto-detect, then copy self-contained HTML with inline styles in a light or dark theme, or with highlight.js classes. Nothing is uploaded.
Temperature ConverterSoonConvert between Celsius, Fahrenheit, Kelvin, and other temperature units.
Text Diff✦ NewFind the difference between two texts with character, word, or line precision.
Text EditorSoonWrite text, view word counts, and export to PDF in a full-screen editor.
Text to Binary, Hex and ASCII Converter, Free and Private✦ NewConvert text to binary, hexadecimal or decimal ASCII codes and back in your browser. UTF-8 aware, any separator, forgiving decoder. Nothing is uploaded.
Time ConverterSoonConvert between seconds, minutes, hours, days, and other time units.
Unicode Converter: Code Points, UTF-8, UTF-16, Escapes✦ NewConvert text to and from Unicode code points, binary, octal, decimal or hex numbers, UTF-8, UTF-16 and UTF-32 code units, byte arrays and JavaScript, JSON, Python, C, Java, CSS or HTML escapes, with a per-character breakdown. Nothing is uploaded.
URL Parser: Split a URL and Edit Its Query String✦ NewBreak any URL into protocol, host, port, path, query and hash with the browser's own parser. Decode path segments, edit query parameters in a table, resolve relative links and see Punycode hostnames. Nothing is uploaded.
Volume ConverterSoonConvert between liters, gallons, cubic meters, and other volume units.
What Is My IP Address? IPv4 and IPv6, Free and Private✦ NewSee your public IPv4 or IPv6 address in one click, plus your browser, operating system, screen size, time zone and language. The address is shown back to you and never stored.
XML Formatter and Validator: Beautify or Minify XML✦ NewIndent XML with 2 spaces, 4 spaces or tabs, minify it, or check that it is well-formed with line and column errors. Comments, CDATA, namespaces and the declaration are kept. Nothing is uploaded.

generator

Barcode Generator, Code 128, EAN-13, UPC, Code 39✦ NewMake a barcode in your browser: Code 128, Code 39, EAN-13, EAN-8, UPC-A or ITF-14. Check digits are added and checked for you. Set bar width, height and colours, then download SVG or PNG. Nothing is uploaded.
Coin Flipper: Flip 1 to 100 Coins, Heads or Tails✦ NewFlip a coin online, or up to 100 coins at once, with an animated result, a running tally of heads and tails with percentages and a history of your last 50 flips. Random and private.
Color Palette Generator, Schemes and Random, Free✦ NewMake a color palette in your browser from one base color: complementary, analogous, triadic, tetradic, square or monochromatic, or press the space bar for a random one. Lock swatches, check contrast, export CSS, JSON or PNG. Nothing is uploaded.
Date / Time GeneratorSoonGenerate random dates and times in the past, future, or a specific range. Choose from various output formats like ISO strings or Unix timestamps.
ECDSA Key Generator, Sign and Verify Online✦ NewGenerate ECDSA key pairs, sign messages and verify signatures on secp256k1, P-256, P-384 and P-521 in your browser. SHA-2, SHA3-256 or Keccak-256 hashing, DER or compact signatures, deterministic RFC 6979. Nothing is uploaded.
Fake IBAN GeneratorSoonGenerate fake IBAN numbers for testing and development. Choose from 60+ countries, generate up to 500 at once, export as CSV or JSON, and learn how the MOD-97 check digit works.
Fibonacci Generator: Sequence, n-th Term and Lucas✦ NewList the first n Fibonacci numbers or find the n-th term exactly, up to 1000 terms. Use custom seeds such as Lucas numbers, pick the start index, and compare F(n+1)/F(n) with the golden ratio.
Hash Calculator: SHA-3, BLAKE2, KMAC, Keccak Online✦ NewCompute one of 32 hashes of text or a file in your browser: SHA-3, Keccak-256, SHAKE, cSHAKE, KMAC, BLAKE2, BLAKE3, RIPEMD, SHA-2, MD2, MD4 and MD5. Keys, customisation strings, variable output length, hex or Base64, compare field. Nothing is uploaded.
Hash Generator: MD5, SHA-1, SHA-256, SHA-512 Online✦ NewCompute MD5, SHA-1, SHA-224, SHA-256, SHA-384 and SHA-512 of any text or file at once in your browser, in hex or Base64, and compare with an expected hash. Nothing is uploaded.
Lorem Ipsum GeneratorSoonGenerate random, realistic placeholder text (Lorem Ipsum) in paragraphs, sentences, or words.
Number Sequence Generator: Arithmetic, Geometric & More✦ NewGenerate arithmetic, geometric, even, odd, powers, squares, cubes, look-and-say, Fibonacci-like and linear recurrence sequences, integer pairs and triples, palindromes, zigzags, array literals and set-theoretic ordinals, with the nth-term formula and exact sum. Nothing is uploaded.
Password GeneratorSoonGenerate secure, random passwords. Customize length and choose to include numbers, symbols, uppercase, and lowercase characters.
Phone Number GeneratorSoonGenerate random phone numbers following the E.164 international standard for different countries.
Pi Digits Generator: Digits of π, e and Golden Ratio✦ NewGenerate up to 10,000 decimal places of π, e or the golden ratio φ, calculated exactly in your browser, grouped in blocks of 5 or 10, and look up the digit at any place. Nothing is uploaded.
Prime Number Generator: List, Test and Find Primes✦ NewList primes between two numbers, get the first n primes, test whether a number up to 2^64 is prime with its smallest factor, or find the n-th prime. Copy or download the list.
QR Code Generator, Free, No Sign-Up, Private✦ NewMake a QR code in your browser for a link, text, WiFi network, contact card, email, SMS, phone number or map location. Choose size, colours and error correction, add your logo, and download SVG or PNG. Nothing is uploaded.
Random Number Generator with PIN Mode, Free and Private✦ NewGenerate random integers or decimals in any range, unique or sorted, one or a thousand at a time, plus random PIN codes. Cryptographically random and never sent anywhere.
RSA Tool: Generate Keys, Encrypt, Decrypt, Sign, Verify✦ NewGenerate RSA key pairs as PEM, encrypt and decrypt with RSA-OAEP, and sign or verify with PKCS#1 v1.5 or PSS, all in your browser with the Web Crypto API. Keys never leave your device.
Slug GeneratorSoonGenerate URL-friendly slugs from text. Customize replacements, lowercasing, strict mode, and more.
SVG Blob Generator, Random Shapes, Free and Private✦ NewDraw a random, smooth SVG blob in your browser. Pick the number of points, contrast, solid or gradient fill and an outline. A seed lets you recreate any shape. Copy the SVG or download SVG and PNG. Nothing is uploaded.
SVG Pattern Generator, Seamless Backgrounds, Free✦ NewMake a seamless SVG background pattern in your browser. Choose dots, stripes, grid, zigzag, waves, hexagons and more, then set size, spacing, rotation, colours and opacity. Copy the CSS or SVG, or download SVG and PNG. Nothing is uploaded.
Unicode Generator: Random Characters, Ranges, Code Points✦ NewGenerate random Unicode characters, letters, numbers and text from chosen blocks and scripts, list code point ranges, keep or remove characters by block, and increment or decrement code points. Printable characters only by default. Nothing is uploaded.
URL Encoder/DecoderSoonEncode or decode URLs and text securely. Convert special characters to URL-safe format and back.
UUID / GUID GeneratorSoonGenerate universally unique identifiers (UUIDs/GUIDs). Supports v1, v3, v4, v5, and v7 with bulk generation and formatting options.

image

Average Color Finder: Mean Color of an Image or Area✦ NewFind the average color of a whole image or of a rectangle you drag on it. Get the hex, RGB and HSL values, the brightness, and whether black or white text reads better on it. Runs in your browser. Nothing is uploaded.
Binary to Image: Draw Bits or Hex Bytes as a PNG✦ NewDraw binary digits or hex bytes as pixels in your browser: 1 bit per pixel with your own colours, 8-bit greyscale or 24-bit RGB. Set the width and scale, then download a PNG. Nothing is uploaded.
Bulk Color Extractor: Colors of Many Images at Once✦ NewPull the top 5 colors and the average color from up to 20 images in your browser. One row per image with its thumbnail, hex codes and shares. Export the table as CSV or JSON. Nothing is uploaded.
Color Extractor: Dominant Colors of an Image✦ NewGet the dominant colors of any image in your browser, 2 to 16 of them, each with hex, RGB, HSL and its share. Sort by share or hue, skip near-white or near-black, export CSS, JSON or PNG. Nothing is uploaded.
Image Color Picker: Get Hex and RGB from a Photo✦ NewPick a color from any image in your browser. Hover to magnify 11 by 11 pixels, click to pin hex, RGB and HSL values, zoom and pan, or use the arrow keys. Nothing is uploaded.
Image Compressor: Compress JPG, PNG, WebP, AVIF✦ NewCompress JPG, PNG, WebP and AVIF images in your browser. Pick a quality level or a target file size. Your files never leave your device. Free, no signup, no upload.
Image Converter: PNG, JPG, WebP, AVIF, BMP, GIF✦ NewConvert images between PNG, JPG, WebP, AVIF, BMP and GIF in your browser. Your files never leave your device. Free, no signup, no upload.
Image Cropper: Crop, Rotate and Flip a Photo Online✦ NewCrop a photo with a draggable box, aspect presets such as 1:1 and 16:9, or exact pixel values. Rotate, flip, then save as PNG, JPEG or WebP at full size. Runs in your browser. Nothing is uploaded.
Image Filter: Grayscale, Sepia, Blur and Photo Effects✦ NewApply grayscale, sepia, invert, brightness, contrast, saturation, hue, blur, sharpen and vignette to a photo, or pick a preset. Compare before and after, then save at full size. Runs in your browser. Nothing is uploaded.
Image Resize Calculator: Keep the Aspect Ratio✦ NewFind the new height or width of an image when you resize it and keep the aspect ratio. See the reduced ratio, scale percent and megapixels before and after. No file needed.
Image Resizer: Resize Photos by Pixels or Percent✦ NewResize PNG, JPG, WebP, AVIF, BMP and GIF pictures in your browser by pixels, percent or to fit a box. Keep the aspect ratio, resize many at once. Nothing is uploaded.
Image to Base64 Converter, Data URL and CSS Snippets✦ NewTurn a PNG, JPEG, WebP, GIF, BMP or AVIF image into Base64, a data URL, an img tag or a CSS url(), with sizes and one-click copy. Paste Base64 to get the picture back. Nothing is uploaded.
Photo Censor: Pixelate, Blur or Hide Part of an Image✦ NewHide a face, plate, address or any detail in a photo. Draw rectangles or ellipses, then pixelate, blur or fill each one with a solid colour. Undo, redo and save at full size. Runs in your browser. Nothing is uploaded.
SVG Stroke to Fill Converter, Free and Private✦ NewTurn the strokes of an SVG into filled shapes in your browser. Lines, rectangles, circles and paths keep their look with caps, joins and curves outlined. Paste code or open a file. Nothing is uploaded.
SVG to PNG Converter, Free and Private✦ NewConvert SVG files to PNG, JPG or WebP in your browser. Pick a scale from 1× to 8× or an exact width and height, set the background for JPG, convert many at once. Nothing is uploaded.

text

ASCII Art Generator: Text to Big Banner Letters✦ NewTurn text into large ASCII-art letters in block, small or shadow banner fonts. Choose the drawing character, letter spacing and a maximum width that wraps words, then copy or download the art. Nothing is uploaded.
ASCII Table: Codes 0-127 in Hex, Octal, Binary, Decimal✦ NewAll 128 ASCII codes with decimal, hex, octal, binary, HTML entity, character and control-code names such as LF Line Feed. Filter by class, sort any column, view Windows-1252 128 to 255, copy as text or CSV. Nothing is uploaded.
ASCII Tools: Validate, Transliterate, Flip Bits, UTF-8✦ NewConvert Unicode to plain ASCII, find non-ASCII characters, validate UTF-8 bytes or files, show ASCII as UTF-8 bytes, flip or shuffle ASCII bits, and generate ASCII characters, random ASCII or random UTF-8. Nothing is uploaded.
Duplicate RemoverSoonRemove duplicate lines, words, or numbers from your text with customizable filtering options.
List Editor: Filter, Slice, Rotate, Count and Pick Items✦ NewEdit a list of items in your browser: delete empty or repeated items, filter, find, replace, slice, rotate, group, duplicate, count the most frequent items, pick random items or build custom lists. Nothing is uploaded.
List Formatter: Bullets, Numbering, Quotes and Columns✦ NewFormat a list in your browser: add or remove bullets and numbering, prefixes, suffixes and quotes, pad, trim, wrap, change or normalize separators, join items, arrange in columns, colour items as HTML or draw the list as a PNG. Nothing is uploaded.
List Sorter: Alphabetical, Numeric, Natural, Random✦ NewSort a list alphabetically, naturally, numerically or by length, or shuffle it, in your browser. Any separator, trim, remove blanks and duplicates. Nothing is uploaded.
Reverse Text: Characters, Words, Lines and Flip✦ NewReverse text by characters, word order, letters in each word or line order, or flip it upside down, in your browser. Emoji and accents stay intact. Nothing is uploaded.
Text Case Converter: Upper, Lower, Title, camelCase✦ NewConvert text to UPPER CASE, lower case, Title Case, Sentence case, camelCase, snake_case, kebab-case and more in your browser. Smart small words, Unicode aware. Nothing is uploaded.
Unicode Normalizer: NFC, NFKC, Fancy Text and Homoglyphs✦ NewNormalise text to NFC, NFD, NFKC or NFKD with a per-character code point view, turn fancy letters and numbers back into plain ASCII, and spoof, unspoof or detect Cyrillic and Greek homoglyphs. Nothing is uploaded.
Unicode Text Tools: Grapheme-Aware Pad, Reverse, Zalgo✦ NewPad, centre, chunk, shift, rotate, reverse, repeat, truncate, split, sort and count Unicode text by grapheme, so emoji, flags and accents stay whole. Add strikethrough marks, make Zalgo text or clean it. Nothing is uploaded.
Whitespace Remover: Extra Spaces and Blank Lines✦ NewRemove extra spaces, blank lines, tabs and invisible characters from text in your browser. Trim lines, collapse spaces, normalise line endings. Nothing is uploaded.