Format, minify, escape, and convert Unicode in JSON

Visually edit JSON data, supports code mode and tree mode with real-time sync

Quickly format and beautify HTML code

Quickly format and beautify JavaScript code, supports ES6+

Quickly format and beautify CSS code

Quickly format and beautify SQL statements

Test HTTP/HTTPS APIs online, supports GET, POST, PUT, DELETE and more

Test WebSocket connections online, view message history in real-time

Test regular expressions online with real-time match results

Calculate MD5, SHA-1, SHA-256 hashes of files, processed locally without upload

Encode/decode Base64, URL, HTML entities, and generate MD5 hashes

Compare two texts and highlight differences, supports line-by-line and character-by-character comparison

Generate and parse Cron expressions with second precision, preview next 5 execution times

Parse JWT tokens, view Header, Payload, and Signature information

Generate various Nginx configuration files online, covering basic, security, advanced, and application scenarios