JSON Formatter validates and pretty-prints JSON in your browser. Choose indentation, optionally sort keys, then copy or download the formatted result.
JSON Formatter
JSON Formatter Free
Paste messy JSON and pretty-print it with 2 spaces, 4 spaces, or tabs. Optional alphabetical key sorting - fully local.
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What is this?
How it works
1. Paste unformatted JSON.
2. Choose indent size and key sorting.
3. Click Format JSON.
4. Copy or download the pretty result.
Features
- 2 / 4 space or tab indent
- Optional key sorting
- Clear invalid-JSON errors
- Copy and download .json
Benefits
Clean up API responses and config files for reading and sharing.
Trust & privacy
Your JSON is processed only in your browser. Studix does not upload or store it for this tool.
Frequently asked questions
No. Formatting runs entirely in your browser.
Yes. Enable Sort keys alphabetically before formatting.