JSON Diff
Compare two JSON documents structurally
JSON Diff is a free online tool from BrowserUtils that compare two json documents structurally. It runs entirely in your browser — your data never leaves your device. No account required.
Enter JSON in both panels to see structural differences
How to use JSON Diff
- 1 Paste or type your input into the editor above.
- 2 The tool processes your data instantly — right in your browser, with nothing sent to a server.
- 3 Copy the result with one click or continue editing your input.
About JSON Diff
Free online JSON diff tool. Compare two JSON objects and see added, removed, and modified keys with a structure-aware visual diff. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
JSON Diff specs
- Runtime
- 100% client-side (browser)
- Built on
- Native JavaScript JSON.parse / JSON.stringify (RFC 8259 compliant)
- Cost
- Free — no account, no rate limits, no usage caps
- Browser support
- Chrome 90+, Firefox 88+, Safari 14+, Edge 90+
- Part of
- 299 developer tools on BrowserUtils (100% client-side)
Questions
How is JSON diff different from text diff?
Text diff compares line by line, which can produce misleading results when keys are reordered. JSON diff compares the actual structure and values, so reordering keys does not show as a change.
What types of changes are detected?
The tool detects added keys (present only in the second JSON), removed keys (present only in the first), modified values (same key, different value), and type changes (e.g., string to number).
Can I use JSON diff to compare API responses?
Yes, paste two API responses and the tool will highlight exactly which fields changed between them, making it easy to debug API changes or version differences.
Does key ordering matter in the comparison?
No. JSON objects are unordered by specification, so the diff compares by key name regardless of the order keys appear in the document.
Can I use JSON diff to compare configuration files?
Yes, paste your two config file versions and the tool will show exactly which settings were added, removed, or changed between them.
Is the JSON diff tool safe for sensitive data?
Yes, both JSON documents are compared entirely in your browser. Nothing is sent to a server, so you can safely compare private configuration or API data.
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