HTTP Status Lookup

Look up what a status code means — 200, 301, 404, 502 and friends.

HTML Beautifier

Pretty-print HTML with consistent indentation.

MIME Type Lookup

Find the MIME type for a file extension, or the other way around.

CSS Minifier

Strip comments and extra whitespace from CSS.

Query String Builder

Turn key/value pairs into a URL query string, or parse one apart.

URL Encoder / Decoder

Encode or decode URI components safely.

Number Base Converter

Convert numbers between binary, octal, decimal and hexadecimal.

Hash Generator

Create SHA-256, SHA-1 and SHA-384 hashes in your browser.

User-Agent Parser

Break a user-agent string into browser, engine and OS guesses.

UUID Generator

Mint version-4 UUIDs, one or many at a time.