Fast JSON Formatter 4+

Format, validate, and query JSON fast. Pretty-print or minify, JMESPath search, syntax highlighting, and error tips. Data stays on your device.

JSON Formatter is a fast, privacy‑first toolkit for reading, validating, and transforming JSON on iPhone, iPad, and Mac. Paste or open JSON to instantly pretty‑print or minify, catch syntax errors, and explore data with JMESPath queries. Built for speed and clarity, everything runs on‑device so you can work confidently anywhere.

Key Features

- Pretty‑print and minify JSON with instant formatting
- Validate structure and highlight errors with helpful tips
- Search and filter using JMESPath queries
- Syntax highlighting for readable, color‑coded JSON
- Quick copy, share, and export options
- Keyboard shortcuts and dark mode for focused workflows
- Works offline; data never leaves your device
Privacy & Performance

- All processing happens locally; no accounts, no tracking.
- Optimized for Mac to deliver a smooth, responsive experience.