Tools that run in your browser

Your files stay on your machine. No sign-up, no watermarks, no limits — because there is no server to impose one.

• Background remover
  Take the background out of a photograph and get the cutout back at the size you put in. The model runs in this tab, so the picture never leaves your machine — and there is no watermark, no account, and no 500-pixel preview you have to pay to escape.
• Colour extractor
  Get the dominant colours from an image, ready to paste into a stylesheet.
• Image compressor
  Make JPG, PNG and WebP files smaller — by a quality setting, or by naming the file size you have to come in under and letting it find the quality that gets there.
• Image converter
  Open a PNG, JPG, WebP or AVIF and save it in another format, using the codecs your browser already ships. Drop in a whole folder, set the quality once, and save the lot.
• Image cropper
  Drag a rectangle and keep what is inside it.
• Image resizer
  Say what size you want in whichever way you already think about it — a width, a percentage, a longest side, or a file size to come in under — and drag the crop while the result redraws next to it.
• Image to text
  Read the words out of a photo, a screenshot or a scan. The recogniser runs inside this tab, so the picture never leaves your machine — and every word it was unsure about is marked, so you know which ones to check.
• Text behind image
  Put a word behind the person in a photo, so they stand in front of it. The subject is cut out here, inside this tab, which is why the picture never has to leave your machine and why the file comes back at the size you dropped in.

• Audio trimmer
  Cut a section out of a track on a real waveform, with the two points where you put them and the result on screen before you save. An MP3 is copied out frame by frame instead of being decoded and encoded again, so what you get back is the audio that went in.
• GIF maker
  Turn a few seconds of video into a GIF you can paste anywhere — and keep the file small enough that it actually loads where you paste it.
• Transcribe audio to text
  Drop in a recording and get the words out — as plain text, as a timestamped transcript, or as a subtitle file. The model runs in this tab, so the recording never leaves your machine.
• Video frame extractor
  Get the exact frame you wanted as a picture you can use — the one where the ball crossed the line, or one every two seconds across the whole clip.
• YouTube frame by frame
  Step through any YouTube video one frame at a time, at the frame rate the video actually uses. Then save the frame you land on, without the paused controls in shot.
• YouTube thumbnail downloader
  Paste a link and save every thumbnail YouTube published for it. Full HD where it exists, in PNG, JPG or WebP, with the black bars trimmed off.

• Convert a file
  Images, video, documents, ebooks and 3D formats. Drop a file in, pick what you want out. Runs on our own hardware rather than in your browser.
• Images to PDF
  Photos and screenshots into a document, with the pictures going in as the bytes they arrived as. Most converters change your picture and do not mention it — this one tells you what it is about to do before you press the button.
• Merge PDF
  Every page from every file lands on one canvas. Drag any page anywhere, turn it, drop it, and change your mind as often as you like.
• PDF to images
  Export pages as PNG or JPG, at whatever size you need.
• Sign PDF
  Draw a signature, type one, or photograph the one you already have on paper. Put it where you want it and save — with the document you started from still there, byte for byte, underneath.
• Split PDF
  Put scissors between any two pages and the document becomes several files. Or switch to picking pages, and keep only the ones you want.
• The editor
  Build a page, or a poster, and take it away as a file. The reason the rest of these exist.

• Case converter
  Change text between sentence case, title case, camelCase, snake_case and the rest — including the ones programmers need and most converters get wrong.
• Line sorter and deduplicator
  Sort, dedupe and tidy a list of lines.
• Lorem ipsum generator
  Placeholder text by the word, sentence or paragraph — in classic Latin or in English that reads like real copy, which is what you want when you are testing a layout someone will actually read.
• Notepad
  Start typing straight away. Every note is kept in this browser, on this device — no sign-up, no account, nothing uploaded, and a save state you can check rather than a promise you have to take on trust.
• Text diff
  Compare two pieces of text and see exactly what changed — line by line, or word by word within a line, which is the view that shows you a single altered number.
• Text to speech
  Paste text, choose a voice, and get an audio file you can keep. The model runs in this tab — so there is no account, no monthly allowance of characters, and the words you paste never leave your machine.
• Word and character counter
  Counts words, characters, sentences, paragraphs and reading time as you type — against the limit you are actually writing to, whether that is a tweet, a meta description or an essay.

• Base64 encoder and decoder
  Encode and decode Base64 — text or files, standard or URL-safe — in your browser, with Unicode handled properly rather than mangled.
• Hash generator
  SHA-256, SHA-384, SHA-512 and MD5 of text or a file, computed in your browser — so you can check a download without handing the file to anybody.
• JSON formatter and validator
  Format, minify and check JSON — with errors that point at the character that broke it, and large numbers that survive the trip unchanged.
• QR code generator
  Make a QR code for a link, some text, a wifi network or a contact card — as an SVG that stays sharp at any size, generated in your browser so the code is never logged.
• Regex tester
  Every match, where it starts, and what it captured.
• UUID generator
  Generate v4 and v7 UUIDs in bulk, from your browser's own cryptographic random source — so they are as unguessable as the ones your server would make.

• Colour converter
  Paste hex, RGB or HSL. Get all of them back.
• Contrast checker
  Whether text on a background is actually readable.
• Palette generator
  One colour in, a palette and a shade ramp out.
• Patterns, surfaces and textures
  Nineteen repeating patterns and seventeen generated surfaces, or the same thing from a photograph of a wall — tiling without a seam, lit as a material, or written out as a normal map.

• Percentage calculator
  The three questions, answered separately.
• Scientific calculator
  Type an expression, or use the keys.
• Unit converter
  Including the gigabyte-versus-gibibyte question.

• Flashcards
  Paste a list and you have a deck — the separator is worked out rather than asked about. Then study it with spacing that puts your attention on the cards you keep getting wrong, or print it double-sided with the answers actually lining up.
• Pomodoro timer
  Focus for twenty-five minutes, break for five, and let the timer keep the count. It stays accurate while the tab is in the background, tells you the clock time each phase ends at, and keeps today's blocks here rather than behind an account.
• Typing practice
  A test that tells you what to practise rather than just how fast you were. Four speed figures instead of one flattering number, a heatmap of every key, a breakdown by finger, and the words that actually cost you the seconds.

• File transfer
  Phone to laptop, laptop to laptop, your machine to someone else's across the country. Open this page on both, read six characters off one screen, and the file goes straight from one device to the other.
• Share a file
  Send something too big for email and get a link that expires when you say it does. Upload-based, so the other person does not have to be there.