JSON Formatter & Validator
Format, validate & beautify JSON data
JSON Input
Paste your JSON or upload a file
No JSON to display
Format some JSON to see the preview here
No valid JSON to display
JSON Validation
Validate JSON syntax
No JSON to validate
Settings & Preferences
Indentation
Tree Collapse Depth
Frequently Asked Questions
Everything you need to know about formatting and validating JSON
About JSON Formatter Tool
Our free online JSON Formatter helps developers, testers, and data professionals beautify, validate, and analyze JSON data. Format unreadable JSON with customizable indentation (2 spaces, 4 spaces, or tabs), enable syntax highlighting for better readability, and get detailed validation errors with line and column numbers. The tool provides comprehensive statistics including key count, nesting depth, array count, and object count. Switch between formatted, minified, and raw views, or explore your data visually with the interactive tree view. All processing happens locally in your browser - your JSON never leaves your device, ensuring complete privacy and security for sensitive configuration files and API responses. Perfect for debugging APIs, editing config files, working with database exports, or learning JSON structure. No registration required, unlimited usage, and completely free.