Powerful developer tools for everyday programming tasks. Format JSON, encode/decode data, generate test data, and more — all running entirely in your browser with zero server processing.
Format, validate, and beautify JSON data instantly.
Encode and decode Base64 strings and files.
Generate random UUIDs (v4) instantly.
Encode and decode URLs and query parameters.
Encode and decode HTML entities for safe web content.
Validate JSON data and get detailed error messages with line numbers.
Decode and inspect JSON Web Tokens to view payload and header.
Test and debug regular expressions with real-time matching and highlighting.
Generate MD5, SHA-1, SHA-256, and other hash values from text.
Format and beautify XML documents with proper indentation.