All tools
All 35 tools, in 8 folders. Each one runs in your browser, so what you put into it is not uploaded anywhere.
- JSON Formatter: Format, validate, repair and explore JSON: tree view, sorted keys, and big numbers kept exactly.
- Regex Tester: Test JavaScript regular expressions live: highlighted matches, capture groups, replace, and a plain-English explanation.
- Hash Generator: Hash text or files with MD5, SHA-1, SHA-2, SHA-3, BLAKE3, CRC-32 and more; verify a checksum; compute an HMAC.
- Unix Timestamp Converter: Turn Unix timestamps in seconds, milliseconds or nanoseconds into dates and back, many at once, with Excel, Windows and Discord times too.
- JWT Decoder: Decode a JSON Web Token, read every claim and its dates, and verify the signature with a secret, a PEM or a key set, told why when it fails.
- URL Encode & Decode: Percent-encode or decode text for a URL with the kinds of escaping told apart, and take a link apart: edit its query, strip its tracking, see its real host.
- Cron Expression Parser: Read a cron expression in plain English, see its next runs in any time zone and what a clock change does to them, or build one; Unix, Spring, Quartz and EventBridge.
- Unit Converter: Convert length, weight, temperature, volume, area, speed, data size and nine more quantities, both ways, with the formula.
- Base64 Encode & Decode: Encode text or files to Base64 and decode it back: URL-safe, MIME line breaks, data URIs, and images you can preview.
- CSV Viewer & Editor: Open a CSV, Excel or JSON file as a table, tidy it (spaces, duplicates, garbled letters, dates and numbers) and save it as CSV, .xlsx or JSON.
- JSON, YAML, XML & TOML: Convert between JSON, YAML, XML and TOML, keeping comments, key order and numbers exactly as written, and told what each format cannot carry.
- Word Counter: Count words, characters, sentences and paragraphs as you type, with reading time, keyword density and readability.
- Case Converter: Convert text to Title Case by Chicago, AP, APA or MLA, sentence case, UPPER and lower case, or camelCase, snake_case, kebab-case and more.
- Text Compare: Compare two texts or files and see every difference, side by side or inline, word by word, with case and spaces ignored if you like.
- Notepad: Notes kept in your browser and nowhere else, written in Markdown with a preview, locked with a password if you like, saved as .md, .html or .txt.
- DOCX Viewer: Open a Word document in your browser, read it on its pages with its tracked changes and comments, and save it as a PDF.
- Color Picker: Pick a colour or paste one in any format and copy it as HEX, RGB, HSL, OKLCH and more, with tints, shades and WCAG contrast.
- Palette Maker: Generate colour palettes: random with locks, harmonies, Tailwind-style 50–950 scales or an image’s colours, exported as CSS, Tailwind, SCSS or JSON.
- Password Generator: Generate strong random passwords, memorable passphrases and PINs in your browser, with the real entropy in bits and the time to crack.
- QR Code Generator: Make QR codes for links, Wi-Fi, contacts, email, SMS and events: static codes that never expire, with colours, a logo, and PNG or SVG download.
- UUID Generator: Generate UUIDs one at a time or a thousand: v4, time-ordered v7, v1, name-based v5 and v3, plus ULIDs and Nano IDs; inspect any UUID.
- Social Media Image Sizes: One picture cut to every size the networks ask for: the Instagram square and story, the X header, the YouTube thumbnail and the rest, in one zip.
- Blur & Mark Up a Screenshot: Cover, blur or pixelate what should not be seen in a screenshot, then mark up the rest with arrows, boxes, numbered steps and labels.
- Image Compressor & Resizer: Compress, resize and convert JPG, PNG and WebP pictures in your browser: many at once, down to a file size you name, never uploaded.
- Remove Metadata & EXIF: See what a photo gives away (where it was taken, the camera and its serial number, data hidden after the image) and remove what you choose, pixels untouched.
- Merge & Split PDF: Merge PDFs, split one into many, and reorder, rotate or delete pages in your browser, with thumbnails, and nothing uploaded.
- JPG to PDF & PDF to JPG: Turn JPG, PNG and other pictures into a PDF, or the pages of a PDF into JPG or PNG pictures, in your browser, with nothing uploaded.
- Compare PDF: Compare two PDFs and see every change marked on the pages, word by word, or the pages compared as pictures; download a report to send on.
- Unlock & Protect PDF: Take the password off a PDF you can open, or put one on with AES-256 and the printing and copying you allow, each copy checked by a second reader.
- PDF Page Numbers: Number the pages of a PDF: any corner, any first page, Roman numerals or Bates numbers across files, each copy read back by a second reader.
- Watermark PDF: Put a text or a logo across the pages of a PDF: centred, at an edge or repeated, at any angle and opacity, each copy read back by a second reader.
- Percentage Calculator: Five percentage questions in one window: fill in any two boxes and the third is worked out, exactly, with the arithmetic shown.
- Date & Age Calculator: Days between two dates, working days with your own weekend and holidays, a date a span away, and an age in years, months, days and everything else.
- Time Zone Converter: One time in every city at once, an hour grid to pick a slot from, and a warning when the gap between two zones changes before the meeting.
- Timer & Stopwatch: Several timers at once, typed as 5, 1:30 or until 17:30, that keep ringing after the window closes; and a stopwatch with laps to copy.
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