All tools
Browse every tool by category. Each one runs in your browser, is free to use and needs no account.
20 tools 6 categories
Developer Tools
View category Developer Tools Base64 Encoder & Decoder Encode text to Base64 or decode Base64 back to text, with full UTF-8 and URL-safe support. Runs locally in your browser — no upload, no signup. Developer Tools Hash Generator Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes from text in your browser. Compare digests and copy them instantly. Developer Tools JSON to CSV Converter Convert JSON arrays to CSV and CSV back to JSON in your browser. Handle quotes, delimiters and nested values, then copy or download the result. Developer Tools JSON Formatter & Validator Format, validate and minify JSON in your browser. Choose 2 or 4-space indentation, sort keys, and copy the result instantly. Free, private, no signup. Developer Tools JWT Decoder Decode a JSON Web Token to inspect its header, payload, signature and expiry claims. Nothing is uploaded and no signature is trusted. Developer Tools Unix Timestamp Converter Convert Unix timestamps to readable dates and back. Supports seconds and milliseconds, UTC and your local time zone, with a live current timestamp. Developer Tools URL Encoder & Decoder Encode or decode URLs and query strings with correct UTF-8 percent encoding. Switch between component and full-URL modes, all in your browser. Developer Tools UUID Generator Generate random UUID v4 and time-ordered UUID v7 in bulk, then copy or download them as text. Runs locally with the Web Crypto API. Developer Tools YAML to JSON Converter Convert YAML to JSON and JSON to YAML in your browser. Keep nested structures, choose the indent size and see YAML errors with a line number.
Image Tools
View category Image Tools Favicon Generator Generate a complete favicon set from one image: crop the square area, render 16–512 PNGs, an Apple touch icon, a web manifest and an HTML snippet. Image Tools Image Compressor Compress JPG, PNG and WebP images in your browser. Control quality, resize by width, compare file sizes and download the result without uploading. Image Tools Image Format Converter Convert PNG, JPG and WebP images in your browser. Choose the output format and quality, keep transparency where supported, and download instantly.
Converters
View categoryText Tools
View category Text Tools Case Converter Convert text between UPPER CASE, lower case, Title Case, sentence case, camelCase, PascalCase, snake_case and kebab-case instantly. Text Tools Diff Checker Compare two texts and highlight added, removed and unchanged lines, words or characters. Runs locally in your browser with no upload. Text Tools Word & Character Counter Count words, characters, Chinese characters, sentences and paragraphs as you type. Includes reading time and works entirely in your browser.
Color & Design
View category Color & Design Color Converter Convert colors between HEX, RGB, HSL and HSV, pick from a color wheel, and copy ready-to-use values for CSS and design tools. Color & Design Contrast Checker Check the contrast ratio between text and background colors and see whether they pass WCAG AA and AAA for normal and large text.
Everyday Utilities
View category Everyday Utilities Password Generator Generate strong random passwords with custom length, character sets and no ambiguous symbols. See the entropy and strength, all generated locally. Everyday Utilities QR Code Generator Create QR codes for links, text and messages, then download them as PNG or SVG. Adjust size, colors and error correction; everything runs locally.