Developer Tools
Free online tools that run entirely in your browser.
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.
Regex Tester
Test regular expressions with live highlighting, capture groups and replace preview. Runs in a Web Worker with a time limit, so a runaway pattern cannot freeze the page.
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.