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JSON Formatter

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About this JSON formatter
JSON (JavaScript Object Notation) is the lingua franca of modern APIs, configuration files, and log exports. This page gives you a fast, private workspace to pretty-print messy payloads, confirm syntax before a deploy, shrink JSON for bandwidth-sensitive clients, and turn tabular JSON into CSV for stakeholders who live in spreadsheets.
Everything runs in your browser: your documents are not uploaded to our servers. That makes this tool suitable for production API responses, internal tokens (still: be careful on shared machines), and one-off debugging sessions.
When this tool helps
  • Validating a response body from REST or GraphQL before you commit it to documentation.
  • Normalizing config JSON so Git diffs stay readable across teams.
  • Minifying JSON for mobile payloads or embedded firmware messages.
  • Exporting an array of homogeneous objects to CSV for finance or operations teams.
How to use this page
  1. Paste or type JSON into the left editor. You can trigger a quick format pass as you type.
  2. Use Format for indented, human-readable output with syntax highlighting on the right.
  3. Use Minify when you need a single-line payload for storage or transmission.
  4. Use Sort Keys to alphabetize keys recursively—ideal before comparing two large objects.
  5. Use JSON to CSV when the root value is an object or an array of objects with similar keys.
  6. Use Copy Result once you are satisfied; the plain text buffer avoids HTML markup from the highlighter.
Tips
  • Very large files may slow down the tab; consider splitting or sampling in those cases.
  • If Validate fails, scroll to the position indicated by your editor—the error is usually a trailing comma or a stray quote.
  • CSV export uses the union of keys across rows; missing keys render as blank cells.
Privacy on this page
Parsing and stringification happen locally via your browser’s JavaScript engine. Clear the editor when you finish if others use the same device.
Frequently asked questions
Does this tool send my JSON to a server?
No. Network calls you see in DevTools should only reflect analytics or ads, not your pasted JSON content.
Why does minified JSON look unreadable?
That is intentional—whitespace is removed to save bytes. Keep a formatted copy in source control for humans.
Why did JSON to CSV fail?
The converter expects an object or an array of objects. Arrays of primitives or deeply nested graphs need a different approach.
Can I sort keys inside nested objects?
Yes. Sort Keys walks the tree recursively so nested structures share the same deterministic ordering.
Is Unicode preserved?
Yes. The editor treats input as UTF-16 JavaScript strings, so international text remains intact.