9 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.
JSON Formatter & Validator
Format, validate and minify JSON online. Instant error messages, runs entirely in your browser.
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.
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.