JSONFormatter: JSON Tool

JSONFormatter is a fast, privacy-first JSON utility that works completely offline.

No internet, no account, and no data collection. Everything runs locally on your device.

Key Features

• Beautify and format JSON with custom indentation (2 spaces, 4 spaces, tabs)

• Minify JSON by removing whitespace for compact output

• Real-time JSON validation with clear error messages

• One-tap actions: copy, clear, undo, redo

• Local history so you never lose your work

• Convert JSON to XML

• Useful stats like character count and line count

Privacy First

• Works 100% offline

• No data collection or tracking

• No ads and no third-party SDKs

• No permissions required

• Safe for all users, including students

Designed for Developers

• Clean Material Design 3 interface

• Light, dark, and system theme support

• Monospace font for better readability

• Fast performance even with large JSON files

• Share formatted output using Android’s system share

Common Use Cases

• Format messy API responses

• Validate configuration files

• Minify JSON for production

• Learn and understand JSON structure

• Quick JSON edits on mobile

Technical Details

• Android 5.0 (API 21) and above

• App size under 5MB

• Optimized for phones and tablets

JSONFormatter is built by developers who value speed, simplicity, and privacy.

No subscriptions, no hidden costs — just a reliable JSON tool that does its job.