Browse the full library

Strong, random passwords or passphrases generated entirely in your browser

Pretty-print JSON with configurable indentation, in your browser

Create RFC-compliant UUID values in your browser for development workflows

Reduce image file sizes with lossy or lossless compression — JPEG, PNG, WebP, and AVIF — entirely in your browser.

Combine multiple PDFs into one in your browser — drag, reorder, and download. No upload.

Count words, characters, sentences, and reading time in plain text

Encode text to Base64 or decode Base64 back to text in your browser, with URL-safe variant, MIME wrapping, and charset support

Pick colors from any image or spectrum and copy HEX, RGB, HSL, OKLCH, and more — entirely in your browser

Generate random numbers in any range, fully in your browser using the Web Crypto API.

Stopwatch with lap splits and millisecond precision — start, stop, and record lap times in your browser

Resize images to exact dimensions or scale by percentage — entirely in your browser, no uploads.

Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case, slug, and more

A spinning wheel picker — add names, spin, and pick a fair random winner in your browser

Count down a duration or down to any date, with an optional alert when time runs out.

Compute MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes of text or files entirely in your browser

Split a PDF into single pages or custom ranges in your browser — no upload.

Combine JPG, PNG, WebP, HEIC, and more into a single PDF entirely in your browser. Reorder, rotate, and configure pages before downloading.

Test regular expressions with flags

Convert Unix timestamps to dates in any timezone, and dates back to timestamps. Supports seconds, milliseconds, microseconds, and nanoseconds.

Convert Word documents to PDF in your browser — no uploads, no watermarks.

Convert any title or phrase into a clean, URL-safe slug with Unicode transliteration, stop-word removal, and configurable length

Two-way HEX ↔ RGB color converter with alpha, CSS4 syntax, and copy-to-clipboard, in your browser

Browser-based GFM Markdown editor with live preview, syntax highlighting, and copy or download to .md or HTML.

Browser-based converter for PNG, JPEG, and WebP images. Client-side processing — images stay on your device.

Find duplicate keys, trailing commas, comments, and other issues

Build CSS linear, radial, and conic gradients visually with live code output, color pickers, presets, SVG export, and shareable permalinks.

Enter foreground and background colors to instantly see the contrast ratio and WCAG 2.2 AA/AAA pass/fail — with suggestions, history, and a shareable link, all in your browser.

Encrypt or decrypt text using AES-256-GCM, CBC, CTR, or ECB

Decode JWT header, payload, and signature. Check expiry and verify locally — in your browser.

Compare two blocks of text side-by-side or unified — see additions, deletions, and changes line by line in your browser

Add or subtract days, weeks, months, or years from any date, and measure durations between dates or times.

Find and replace text in your browser with live match preview, real-time count, regex, and step-through control.

Show the current local time as a digital readout or a live analog face — fullscreen-ready and computed in your browser.

Ask a yes/no question and get an instant answer from the classic 20-response set.

Spin the wheel for an instant, unbiased yes-or-no decision powered by the Web Crypto API.

Split players into balanced teams by skill and role, all in your browser.

Percent-encode or decode URLs and query strings in your browser with component and full-URL modes

Convert HTML special characters to entities and back in your browser, with named, decimal, and hex output and a sandboxed live preview

Crop images to any aspect ratio directly in your browser. Custom, 1:1, 16:9, or 4:3 — your images never leave your device.

Rotate images 90°, 180°, or 270° and flip horizontally or vertically in your browser.

Upload any image and get a Base64 data URI instantly — all encoding happens in your browser, your image is never uploaded.

Convert JPG images to PNG format in your browser — batch support, before/after preview, and file-size comparison.

Browser-based PNG to JPG converter with adjustable quality and background colour. Batch up to 20 files — images stay on your device.

Convert JPG, PNG, GIF, BMP, and AVIF to WebP — or WebP to any format — in your browser. Client-side processing, nothing uploaded.

Roll polyhedral dice — D4, D6, D8, D10, D12, D20. Mix types, track history. Crypto-grade randomness, runs in your browser.

Strip duplicate lines from a block of text, keep first or remove all, in your browser

Visually adjust corner radii for any element. Copy shorthand, longhand, Tailwind, or custom property CSS — all in your browser.

Build multi-layer CSS box-shadow declarations with a live preview — adjust offset, blur, spread, and color per layer, then copy as CSS or Tailwind

Enter a HEX, RGB, or HSL color and generate harmonious palettes using complementary, analogous, triadic, and other color theory rules — with CSS variable and Tailwind export

Strip whitespace from JSON to produce compact output, in your browser

Upload a file, select an algorithm, and compare against an expected checksum — computed entirely in your browser. No data leaves your device.

Paste a cron expression and instantly see what it means in plain English, plus when it will fire next — with timezone support and special-character handling.

HMAC-SHA1 through SHA-512 with hex or Base64 output — runs in your browser.

Convert a JSON array of objects into a downloadable CSV file — entirely in your browser. Supports nested objects, JSONLines, and a live preview before you download.

Sort lines of text alphabetically, numerically, by natural order, or by character length — ascending or descending — with optional cleanup for duplicates, empty lines, and whitespace.

Generate cryptographically secure random strings, API keys, tokens, and secrets with custom character sets — entirely in your browser.