17 free tools · nothing leaves your browser
Free Online Tools
Fast, focused utilities that do one thing well. Everything runs in your browser — nothing is uploaded, nothing is stored.
Developer Tools
View all →Base64 Encoder & Decoder
Encode and decode Base64 online. Full UTF-8 support, runs entirely in your browser, nothing is uploaded.
Color Converter
Convert colors between HEX, RGB and HSL online. Paste any format and get all three, with a live preview. Runs entirely in your browser.
Hash Generator — MD5, SHA-1, SHA-256, SHA-512
Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes from text or a file. Everything is computed in your browser — the file never leaves your device.
What Is My IP — IP Address Lookup
See your public IP address with its network, ISP and location, or look up any IP address. Your own details come from the connection itself, not a third party.
JSON Formatter & Validator
Format, validate and minify JSON online. Instant error messages, runs entirely in your browser.
JWT Decoder
Decode a JSON Web Token to read its header, payload and expiry. Runs entirely in your browser — the token is never transmitted or logged.
Password Generator
Generate strong random passwords in your browser, with the entropy shown and an honest estimate of how long they would take to crack.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back. Handles seconds and milliseconds, UTC and local time.
URL Encoder & Decoder
Encode and decode URLs and query parameters online. Splits any URL into its parameters. Runs in your browser, nothing uploaded.
UUID Generator
Generate RFC 4122 version 4 UUIDs online, in bulk, using your browser's cryptographic random source. Also validates and identifies existing UUIDs.
Text Tools
View all →Case Converter
Convert text between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case and more. Acronyms are handled correctly.
Diff Checker — Compare Text
Compare two blocks of text and see exactly which lines were added, removed or left alone. Runs in your browser; nothing is uploaded.
Word Counter
Count words, characters, sentences and reading time. Handles Chinese, Japanese and Korean correctly, where most counters silently fail.
Image Tools
View all →Image Compressor
Compress JPEG, PNG and WebP images online. Batch processing, quality control and resizing — entirely in your browser, nothing uploaded.
Image Format Converter
Convert images between PNG, JPEG and WebP online. Batch conversion in your browser — no upload, no sign-up, no watermark.
Image Resizer
Resize images online by width, height or percentage. Batch processing with aspect ratio preserved — runs in your browser, nothing uploaded.