JSON Formatter
Validate JSON and format it with readable indentation.
Your input is processed in this browser. This tool does not upload, save, or log your text.
Developer tools that just work
5 free tools to format, validate and encode data in your browser.
JSON tools
How to use JSON Formatter
- Enter your text or choose Load example.
- Select Process to validate and run the tool.
- Review the result, then copy or download it.
What this tool does
Turn compact JSON into a structured document with two-space indentation. Invalid JSON produces a clear error instead of a partial result.
Supported files, limits & important details
JavaScript number precision applies. Very large integers can lose precision. Duplicate object keys keep the last value.
Input limits are enforced before processing. Clear removes your input and result from this page. This tool does not store your input between visits.
Keep your workflow moving
Questions about JSON Formatter
How do I use JSON Formatter?
Enter your text or choose Load example. Select Process to validate and run the tool. Review the result, then copy or download it.
Are files or text uploaded when I use JSON Formatter?
No. JSON Formatter processes your input in your browser. The tool does not upload your document or text for processing. Keep your original and review the result.
What should I check before relying on JSON Formatter?
Turn compact JSON into a structured document with two-space indentation. Invalid JSON produces a clear error instead of a partial result.
Need help choosing a workflow? Read our practical PDF and file guides. How your data is handled.