JSON Compare & Diff
Related tools
Featured
JSON Formatter & Beautifier
Format, indent, validate, and beautify JSON with custom spacing.
JSONFormatter
JSON Validator & Linter
Validate JSON syntax and view exact error line, column, and diagnostic tips.
Json validatorJson linter
JSON Editor
Edit JSON files with a real code editor, tree view, validation, and syntax highlighting.
Json editorOnline json editor
JSON Sorter
Sort JSON keys alphabetically in ascending or descending order.
Json sorterSort json keys
JSON Tree Viewer
Visualize JSON hierarchy with collapsible outline tree view.
Json treeJson viewer
JSON Minifier
Minify JSON by stripping whitespace and formatting for production.
JSONMinify
Diffing JSON as plain text is misleading: reordering keys or reindenting a file produces a wall of red and green that says nothing about whether the data actually changed. This JSON compare tool diffs the parsed structure instead of the raw characters, so it reports what genuinely differs — keys that were added, keys that were removed, and values that changed — while ignoring formatting and key order. That makes it useful for the everyday cases where text diff falls down: checking whether an API response changed between two deploys, confirming a config migration preserved every setting, or working out why one environment behaves differently from another. Paste the two documents, and the differences are listed by path so you can jump straight to the field that matters. Both documents are parsed and compared locally in your browser, so nothing is uploaded and you can safely compare payloads that contain tokens or customer data.
Features
- Structural diff that ignores key order and whitespace
- Reports added, removed, and changed keys separately
- Identifies differences by full path (e.g. user.address.city)
- Compares nested objects and arrays at any depth
- Validates both inputs before comparing, with clear errors
- Handles large documents without a server round-trip
- Works on API responses, config files, and fixtures
- Fully client-side — neither document is uploaded
Why use this json compare?
- Shows real data changes instead of formatting noise
- Pinpoints the exact path that differs, not just the line
- Keeps both payloads private with local-only processing
- No signup and no limit on how many comparisons you run
- Faster than eyeballing two files side by side
Frequently asked questions
How is this different from a plain text diff?
A text diff compares characters, so reordering keys or changing indentation shows as a difference. This tool parses both documents and compares the resulting structures, so only genuine data changes are reported.
Does key order affect the comparison?
No. JSON objects are unordered by specification, so two documents with the same keys in a different order are treated as identical.
How are arrays compared?
Arrays are ordered in JSON, so elements are compared by position. Moving an item to a different index is reported as a change at both positions.
Is my data sent anywhere?
No. Both documents are parsed and compared in your browser. Nothing is uploaded, stored, or logged, so comparing payloads containing secrets is safe.
What happens if one document is invalid JSON?
The tool reports the parse error and the location it was found, so you can fix the malformed document first. A comparison only runs when both inputs parse successfully.
Can I compare JSON that differs only in number formatting?
Values are compared after parsing, so 1.0 and 1 are equal as numbers, while "1" as a string is different from 1 as a number.