{ }
JSON Formatter & Validator
Beautify, inspect, and validate JSON payloads. Pinpoints syntax errors with exact line and column numbers, supports custom indentation (2 or 4 spaces), and minifies for production payloads.
Engineering Utilities
Free, Privacy-First Developer Tools
High-speed, browser-based utilities engineered for daily web development. All processing happens 100% client-side in your browser — your tokens, SQL queries, and data never touch our servers.
🔑
JWT Token Inspector & Decoder
Decode JSON Web Tokens safely in your browser. Inspect headers, payload claims (iss, sub, aud), verify expiration timestamps in human-readable time, and check signature algorithms.
💾
SQL Query Formatter & Beautifier
Turn messy single-line SQL queries into clean, readable, standardized SQL statements with capitalized keywords (SELECT, FROM, WHERE, JOIN, GROUP BY) and proper clause indentation.
🔤
Base64 & URL Encoder/Decoder
Encode or decode plain text, UTF-8 strings, and query parameters to and from Base64 and URL-encoded formats. Instant bi-directional conversion with one-click copy.
🛡️
Cryptographic Hash & Checksum Generator
Compute cryptographic hashes (SHA-256, SHA-512, SHA-384, SHA-1) client-side using the native Web Cryptography API. Includes security explanations for password hashing (Argon2 / bcrypt).
Why Use Mangobaz Developer Tools?
🔒 100% Client-Side Privacy
Unlike many online conversion websites, our tools process everything locally in your browser using standard JavaScript and the Web Crypto API. Sensitive tokens and queries are never logged or transmitted.
⚡ Zero Latency
No round-trip HTTP server delays. Conversions, formatting, and validation execute instantly as you type.
📚 Linked with In-Depth Tutorials
Each tool is paired with comprehensive engineering guides written by our team, providing deep context on the underlying RFCs, protocols, and architectural best practices.