JSON Formatter
Pretty-print, validate, and minify your JSON data instantly. 100% private and secure.
How to Use JSON Formatter
Paste/Load JSON
Paste your raw text, click 'Load Sample' to test, or upload a .json file.
Validate & Format
Check real-time error details. Format will prettier-print instantly on valid entries.
Explore & Save
Navigate using the interactive collapsible tree, copy code, or download your files.
Frequently Asked Questions
Is my JSON data safe?
Yes, 100%. All processing, validation, formatting, and file exports happen completely inside your web browser. Nothing is ever sent online or to third-party APIs.
What does the Tree Viewer tab do?
It creates a beautiful interactive interface mapping out complex keys. You can collapse/expand objects and arrays to quickly scan deep hierarchies without reading raw lines.
How does the syntax validator show errors?
If parsing fails, it instantly displays a red diagnostics box showing the raw parsing error message, along with the precise line and column index of the issue.