Free online tools that run in your browser
Clean up text, convert images, merge PDF files, format code, and work out a loan payment without installing anything. Your files stay on your device.
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See all 445 toolsText toolsWord CounterCount words, characters, letters, sentences, paragraphs, and lines in any text as you type, with size in bytes and estimated reading time.Developer toolsJSON FormatterFormat and validate JSON with 2-space, 4-space, or tab indentation, sort keys alphabetically, and see the position of any syntax error.Image toolsImage CompressorCompress an image to a smaller JPG or WebP file by lowering quality and capping its longest side, with a live estimate of the new size.PDF toolsMerge PDFMerge two or more PDF files into a single PDF in the order you choose, processed in your browser so the documents are never uploaded.Image toolsQR Code GeneratorGenerate a QR code from a link or any text, choose its size, colors, and error correction level, and download a static PNG that never expires.Security toolsPassword GeneratorGenerate strong random passwords of 6 to 64 characters in your browser, with a choice of letters, digits, and symbols and an entropy estimate.Finance and business calculatorsLoan CalculatorCalculate the monthly payment, total repayment, and total interest of a loan from the amount, annual interest rate, and term in months.Health calculatorsBMI CalculatorCalculate body mass index from weight in kilograms and height in centimetres, with the WHO category and a healthy weight range.Time and date toolsPomodoro TimerWork in Pomodoro cycles of 25 minutes of focus and 5 minutes of rest, with a 15 minute break after every fourth focus session.Math calculatorsPercentage CalculatorCalculate X percent of Y, what percent X is of Y, and Y after an increase or decrease of X percent, all from two numbers.Math calculatorsUnit ConverterConvert a value between units of length, weight, area, volume, temperature, speed, time, data, pressure, and energy in one table.Random generators and gamesWheel of NamesEnter names or options, spin the wheel, and let the pointer choose one at random; your list is saved in this browser.
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Text tools56 toolsWord Counter, Case Converter, Diff CheckerDeveloper tools41 toolsJSON Formatter, Regex Tester, Unix Timestamp ConverterEncoding and data tools28 toolsBase64 Encoder/Decoder, URL Encoder/Decoder, CSV to JSON ConverterSecurity tools10 toolsPassword Generator, Hash Generator, JWT DecoderCSS and color tools39 toolsColor Converter, CSS Gradient Generator, Box Shadow GeneratorImage tools73 toolsImage Compressor, Image Resizer, Crop ImagePDF tools10 toolsMerge PDF, Split PDF, JPG to PDFMath calculators36 toolsPercentage Calculator, Unit Converter, CalculatorFinance and business calculators25 toolsLoan Calculator, Compound Interest Calculator, Tip CalculatorHealth calculators6 toolsBMI Calculator, TDEE Calculator, Water Intake CalculatorEngineering and science calculators28 toolsConcrete Calculator, Paint Calculator, Voltage Drop CalculatorTime and date tools25 toolsPomodoro Timer, Timer, StopwatchRandom generators and games31 toolsWheel of Names, Random Number Generator, Dice RollerSEO and web tools12 toolsMeta Tag Generator, SERP Preview, Sitemap GeneratorDevice tests12 toolsKeyboard Test, Mouse Test, Dead Pixel TestProductivity tools13 toolsOnline Notepad, Whiteboard, Printable Calendar Maker
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Random generators and gamesBracket GeneratorCreate a single elimination tournament bracket for 2 to 64 players or teams, seeded in list order or drawn at random, ready to print.Image toolsCollage MakerCombine several photos into one image: join them side by side, stack them vertically, or arrange them in a grid with spacing and a border color.CSS and color toolsCSS Grid GeneratorBuild a CSS grid layout by setting columns, rows, track size, and gap with a live preview, then copy the grid-template declarations.Random generators and gamesWord Search GeneratorMake a printable word search puzzle from your own word list with a chosen grid size, optional diagonal and backward words, and an answer key.Developer toolsJSON Tree ViewerView JSON as a collapsible tree: expand and collapse objects and arrays, see item counts, and spot the type of every value by color.Math calculatorsMatrix CalculatorAdd, subtract, and multiply matrices, and find the determinant, inverse, transpose, and rank of a matrix typed one row per line.
What is Handitab?
Handitab is a free collection of 445 browser-based tools in 16 categories, covering text, developer and data formats, security, CSS and color, images, PDF, calculators, timers, random generators, SEO, and device tests. The tools run as JavaScript on your own device. Text you paste and files you open stay in your browser, and there is no sign-up.
Each tool page states what the tool does, the formula or method behind it, and its limits. Read how Handitab works.