data tool
JSON Formatter
Paste JSON and format it locally for debugging, docs, and code reviews.
Paste data here. It stays in your browser.
Copy-ready result appears here.
How it works
- Parses JSON with JSON.parse.
- Stringifies with two-space indentation.
- Shows parser errors when invalid.
Common use cases
- Read API responses.
- Prepare documentation examples.
- Debug webhook payloads.
Code example
JSON.stringify(JSON.parse(input), null, 2)Readability first
Formatted JSON is easier to review in bug reports, API docs, and code reviews. It also makes nested payloads easier to scan.
Keep sensitive data out of screenshots
Before sharing formatted payloads, remove secrets, tokens, private IDs, and customer data.
FAQ
Is my input uploaded?
No. This MVP runs tool logic in your browser and does not send tool input to a server.
Can I use this on mobile?
Yes. Pages are mobile-first and designed for quick copy, paste, and share workflows.
Does the tool store history?
No. The MVP does not store tool input history or create user accounts.
Should I verify important output?
Yes. These tools are designed for productivity, but production changes and financial decisions should be independently verified.
Can the tool run after the page loads?
Yes. The interactive logic runs in the browser once the static page and JavaScript island are loaded.
What input format should I use?
Use the examples on the page as a starting point, then replace them with your own local input.