Free online tools. Help yourself.
Small, focused tools that do one thing well. No signup, no upload, no fuss.
My tools
Kept on this device. Sign in and they follow you anywhere.
Colour
Contrast FixerA colour contrast fixer — the nearest accessible colour that passes WCAG AA.Contrast GridA contrast grid for your whole palette — every pairing checked against WCAG.Colour ConverterA colour converter: HEX to RGB, RGB to HEX, and either to HSL.Contrast CheckerA colour contrast checker for WCAG accessibility levels.
Converters
Currency ConverterAn exchange rate calculator using the European Central Bank's official daily rateUnit Converterkg to lbs, mm to inches, cm to feet — every everyday unit, in your browser.CSV to JSONCSV to JSON and back — turn a spreadsheet export into clean, readable JSON.Markdown to HTMLTurn Markdown into clean HTML, with a preview you can trust.YAML to JSONConvert a config file to JSON, or JSON back to readable YAML.Time Zone ConverterA time zone converter and world clock — one time, every city at once.
CSS
Developer
What Is My IPWhat's my IP — the address the internet sees, and where it thinks you are.XML FormatterAn XML formatter that indents, minifies and checks a document in your browser.Base64 Encoder & DecoderBase64 encode and decode text instantly, with full Unicode support.URL Encoder & DecoderA URL encoder and decoder for links and query strings, percent-encoded properly.ASCII TableThe full ASCII table, with the control codes explained rather than left blank.Binary TranslatorA binary translator both ways — binary to text, text to binary, hex and decimal too.Cron Expression ParserRead a cron expression in plain English, and see exactly when it will next run.JWT DecoderA JWT decoder that inspects JSON Web Tokens safely.Subnet CalculatorA subnet calculator that gets /31 and /32 right, which most do not.Regex TesterA regex tester for regular expressions, run safely against your own text.Timestamp ConverterA Unix timestamp converter — timestamps to dates, and dates back to timestamps.JSON FormatterA JSON formatter that validates and beautifies instantly — or minifies.UUID GeneratorA UUID generator for random v4 identifiers, instantly.Internet Speed TestAn internet speed test that keeps the history — download, upload, ping and jitter, measured properly.Regex ExplainerA regex explainer: paste a pattern and read what every part of it does, in English.SQL FormatterAn SQL formatter for 21 dialects — paste unreadable SQL, get it laid out, nothing uploaded.
Games
Generators
Coin FlipA coin toss you can trust — heads or tails, from real randomness.Countdown TimerA 5 minute timer, a 10 minute timer, or any timer online — with an alarm.Dice RollerA dice roller for any number of sides, rolled in your browser.Random Number GeneratorA random number generator for any range, in your browser.Random PickerA random picker for a list of names, drawn in your browser.Barcode GeneratorA barcode generator for EAN-13, UPC-A, EAN-8 and Code 128 — check digit included.Invoice GeneratorA free invoice generator that makes a real PDF — no watermark, no sign-up.Signature MakerA signature maker: draw or type yours, saved with a transparent background.Wheel of NamesA spinning wheel of names — paste a list, spin, and get one fair winner.QR Code GeneratorA QR code generator for any link or text — download it as SVG or PNG.Random Team GeneratorA random team generator — paste a list of names and split it into fair teams.UTM BuilderA UTM builder for campaign URLs, with the tagging mistakes caught as you type.
Image
Photo Gallery MakerA photo gallery maker: drop pictures in, get a link with its own layout and password.Remove BackgroundRemove the background from an image — solid backgrounds go transparent, in your browser.Remove EXIF DataSee what your photos reveal, then remove the EXIF data — without uploading them.AVIF ConverterAVIF to JPG, and JPG to AVIF — the format that halves a photograph.Crop ImageCrop image online — drag the box, or type an exact size in pixels.Image to TextProImage to text: read the words out of a photo — receipts, screenshots, handwriting.Barcode ReaderA barcode scanner online — read a barcode or QR code from a photo or screenshot.Image ResizerA photo resizer for any size — JPEG, PNG, WebP or an iPhone HEIC.Bulk Image ResizerA bulk image resizer for a whole folder at once, in your browser.Image ConverterHEIC to JPG, PNG to JPG, and every other way round — one file or a folder.Compress Image to SizeCompress image to 100KB, 1MB, or whatever exact size the form demands.Favicon GeneratorA favicon generator that turns any image into a complete set.SVG MinifierAn SVG minifier that strips editor clutter and scripts, without touching the artwork.Image CompressorCompress image online — JPEG, PNG, WebP, AVIF, HEIC, TIFF and BMP, all in your browser.App Background PreviewFind the app background image size that survives on every phone and tablet.GIF CompressorCompress a GIF by the only three things a GIF has — frames, colours and size. Nothing uploaded.HEIC to JPGConvert HEIC to JPG — the iPhone photos Windows won't open, turned into files everything reads.SVG to PNGConvert SVG to PNG at any size — sharp at 4000 pixels, in your browser, nothing uploaded.Waveform GeneratorTurn a recording into a waveform PNG or SVG — your colours, your size, nothing uploaded.
Calculators
Pregnancy CalculatorA due date calculator that also tells you how many weeks you are todayBMI CalculatorA BMI calculator in metric or imperial, worked out in your browser.Body Fat CalculatorA body fat calculator that works from a tape measure, using the US Navy method.Calorie CalculatorWork out how many calories you burn a day, and what to eat for a goal.Pace CalculatorA running pace calculator: give any two of distance, time and pace to get the third.Sleep CalculatorA sleep calculator that works backwards from when you have to be up.Age CalculatorAn age calculator: your exact age in years, months and days, from a date of birth.Average CalculatorA mean median mode calculator, with standard deviation and the spread.Business DaysCount forward or back a number of working days and see where you land.Compound InterestA compound interest calculator with regular deposits and any compounding frequency.Date DifferenceHow many days between two dates — plus weeks, months and working days.Days Until ChristmasHow many days until Christmas — counted in sleeps, not hours, and right across time zones.Fraction CalculatorA fraction calculator for adding, subtracting, multiplying and dividing — exactly.Fuel Cost CalculatorA fuel cost calculator for any drive — your units, your currency, split however you like.GPA CalculatorA GPA calculator on the 4.0 scale, weighted by the credits each course is worth.Loan CalculatorA loan calculator for the monthly payment, and how much of it is interest.Percentage CalculatorA percentage increase calculator — and the other three sums people mean.Ratio CalculatorA ratio calculator: reduce to lowest terms, or find the missing number.Roman NumeralsA Roman numeral converter — numbers to numerals, and numerals back to numbers.Salary CalculatorA salary calculator that goes hourly to annual and back — the same pay written every way, before tax.Time Card CalculatorA time card calculator for hours worked, breaks and overtime across a week.Tip CalculatorWork out the tip and split the bill into amounts people can actually pay.VAT CalculatorAdd VAT to a price, or take it back out of one — the sum people get wrong.
PDF to WordConvert PDF to Word — tables, pictures and all — in your browserWord to PDFConvert a Word document to PDF in your browser — nothing is uploaded.Compress PDFReduce PDF size without turning the text into a picture.Merge PDFMerge PDF files into one document.PDF to ImagesPDF to JPG, PDF to PNG — every page as an image, at the size you need.Reorder PDF PagesRearrange, rotate and delete pages from a PDF, then save it back out.Split PDFExtract pages from a PDF or split it into separate files.Images to PDFJPG to PDF and PNG to PDF — photos to PDF, in the order you choose.Rotate PDFRotate PDF pages the right way up — sideways or upside-down.Add Page Numbers to PDFAdd page numbers to a PDF — starting where you want, skipping the pages that should stay clean.Edit PDF TextEdit text in a PDF in your browser — fix a date, a name or a price without sending the file anywhere.Redact PDFRedact PDF pages properly — the words are deleted, not covered, and the file never leaves your computer.Sign PDFSign a PDF — draw your signature, put it where it belongs, and the document never leaves your computer.Watermark PDFAdd a watermark to a PDF — DRAFT, CONFIDENTIAL, or a client's name across every page.
Planning
Security
Auto Redact PDFAuto redact PDF files: it finds the personal information, you confirm, the words are deleted.Password GeneratorA password generator for strong random passwords, in your browser.Cookie CheckerA cookie checker that shows what a website sets, and whether Secure, HttpOnly and SameSite are on.Hash GeneratorA hash generator for SHA-1, SHA-256, SHA-384 and SHA-512.Checksum VerifierA checksum verifier: paste the published SHA-256 and check your download matches.Request a FileRequest files with a link — they upload to you, with no account and no ads.Send a SecretSend a password securely by link that self-destructs after one read.Share a FileSend large files by link, with an expiry date and an optional password.
Text
Readability ScoreReadability score for any text — Flesch–Kincaid, Gunning fog index and more.Word CounterA word counter and character counter, updating as you type.Morse Code TranslatorA morse code translator both ways — text to morse code, and morse code to text.Remove Duplicate LinesRemove duplicate lines, blanks and stray spaces from a list in one pass.Typing TestA typing speed test that shows both your raw and your real WPM.Case ConverterA text case converter: camelCase, snake_case, kebab-case and more.Slug GeneratorA slug generator that turns any title into a clean URL slug.Text DiffA diff checker for text — compare two versions and see exactly what changed, line by line.Lorem Ipsum GeneratorA lorem ipsum generator for placeholder text in mockups and layouts.Compare Two ListsCompare two lists and see what is only in one, only in the other, and in both.
Audio & video
Mic TestA microphone test that answers the real question — will they hear me?Screen RecorderRecord your screen in the browser — nothing is uploaded anywhereWebcam TestA webcam test that tells you what the other end will actually seeAudio TrimmerTrim audio online — cut a piece out of an MP3 or a recording, with nothing uploaded.MP4 to MP3MP4 to MP3 in your browser — the audio out of a video as a real MP3, with nothing uploaded.Transcribe VideoTurn a video or audio recording into text, without uploading it anywhereVideo to GIFConvert video to GIF — MP4 to GIF in your browser, with the frames you choose.
123 tools and counting