⚙ Encoding & Utility Tools
6 free developer and privacy utility tools. Encode and decode data formats, inspect tokens and cookies, parse user agents, and test regex patterns for PII detection.
Encoding & Developer Utilities
These tools help developers, security researchers, and privacy-conscious users work with common data formats — Base64, URL encoding, JWT tokens, HTTP cookies, and user agents — entirely in the browser without sending any data to a server.
Base64 Encoder / Decoder
Encode text or files to Standard, URL-safe, or MIME Base64. Image files are previewed inline. Swap input and output with one click.
btoa / atob API
URL Encoder / Decoder
Percent-encode and decode URLs and components. Parse full URLs into protocol/host/path/query/hash parts. Build query strings from key-value pairs.
URL API
User Agent Parser
Parse any user agent string into browser name/version, OS, rendering engine, device type, and bot detection. Colour-coded token view, 7 presets.
navigator API
JWT Decoder & Inspector
Decode all three JWT segments. See claims with plain-English explanations, live expiry status, and algorithm security flags. Includes example generator.
Base64URL decode
Cookie String Decoder
Parse Set-Cookie headers into all attributes — HttpOnly, Secure, SameSite, Path, Domain, expiry. Per-cookie security score and tracking detection.
Client-side only
Regex Privacy Pattern Tester
Test regular expressions with inline match highlighting. Built-in 19-pattern PII detection library. Match mode, replace mode, and performance timing.
RegExp engine