Developer JSON Utility
JSON Formatter & Beautifier
Format, validate, minify, search, and inspect JSON. Beautify compact payloads, minify formatted documents, and validate syntax instantly with PHP-backed parsing.
Input
Paste or drop JSON
Formatted Output
Highlighted JSON
Structure
JSON tree view
Validation
Document metrics
- Lines
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- Objects
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- Arrays
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- Keys
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- Values
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- Depth
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Professional JSON Formatting
Format, validate, and minify JSON instantly
Stackaris JSON Formatter beautifies compact JSON payloads, minifies formatted documents for production, validates syntax with detailed error reporting, and highlights code for easy review. Perfect for developers working with APIs, configuration files, logs, and data processing workflows.
Server-side JSON validation
PHP-backed parsing provides robust JSON validation with detailed error messages. Identify syntax errors with exact line and column numbers for quick fixes.
Live formatting & minification
Beautify or minify JSON instantly with syntax highlighting. Live mode automatically formats as you type, or use the Format button for manual control.
Developer-friendly editor
Line numbers, drag-and-drop file upload, copy with one click, download formatted results, and keyboard-friendly controls make JSON handling effortless.
Frequently Asked Questions
JSON formatting and validation
How do I beautify minified JSON?
Paste or upload your minified JSON, then select the Beautify mode and click Format. The tool will expand the JSON with proper indentation and line breaks.
Can I minify JSON for production?
Yes. Select Minify mode to remove all whitespace while preserving Unicode characters and unescaped slashes, making JSON smaller for transmission.
How do I validate JSON syntax?
This tool validates JSON as you type or format. Invalid JSON displays an error message with the exact line and column where the syntax error occurs.
Can I upload JSON files?
Yes. Use the Upload button or drag a JSON file onto the input editor. The file content is instantly loaded for formatting and validation.
Do I need to create an account?
No. This JSON formatter is completely free and requires no signup, login, or account creation.