Compare JSON Online
Semantic JSON comparison — key order and formatting are ignored, so you see what actually changed: added, removed, modified, or type-changed values.
Last updated
🔒 100% private — runs entirely in your browseror try sample data
Semantic JSON comparison — key order and formatting are ignored, so you see what actually changed: added, removed, modified, or type-changed values.
Last updated
🔒 100% private — runs entirely in your browseror try sample data
JSON Diff is a free semantic JSON compare tool. Both documents are normalized with sorted keys before comparison, so key order and formatting never show up as noise — only real data changes do. Perfect for API testing, config validation, and debugging.
Comparing JSON data takes three steps — paste, compare, and review.
Paste the original JSON in the left panel and the modified version in the right. The tool accepts objects, arrays, or any valid JSON structure.
Check Ignore array order if element position doesn't matter, then click Compare. The diff engine parses both inputs and compares them structurally.
Added keys appear in green, removed keys in red, modified values in yellow, and type mismatches in teal — each on its exact line. Click a highlighted line for an explanation, or use Prev/Next to step through every change.
Compare API responses before and after a deploy to catch unintended changes. Paste the before and after JSON from tools like Postman or curl and instantly see which fields changed.
Diff environment config files (e.g., config.staging.json vs config.production.json) to verify that only intended settings differ between environments.
Export query results as JSON and compare snapshots taken at different times. Useful for verifying that migrations, seed scripts, or ETL jobs produce the expected output.
When Git shows a conflict in a JSON file, paste both versions here to see the structural differences clearly — much easier than reading raw merge markers.
JSON Diff parses the payload first, so object key order and insignificant formatting changes do not drown out the real change. That makes it the better choice for API responses, config files, and exported records.
If the exact line order, comments, or whitespace are part of what you want to review, use Text Diff instead of a structured JSON comparison.
If you are comparing Postman responses, package files, or schema snapshots, the JSON Comparison Tools hub will route you to the more specific page.
For API payload changes, try API Response Diff or read How to Diff JSON in Postman. For broader JSON discovery, browse the JSON Comparison Tools hub.
Paste your original JSON into the left panel and the modified JSON into the right panel, then click Compare. The tool instantly highlights added, removed, and modified keys with color-coded diffs. You can also check 'Ignore array order' to compare arrays regardless of element position.
A JSON diff shows the exact differences between two JSON data structures. Unlike a plain text diff, a JSON diff understands the structure of your data — it compares keys, values, arrays, and nested objects semantically, so you see meaningful changes rather than line-by-line text differences.
Yes. This tool runs entirely in your browser using client-side JavaScript. Your JSON data is never sent to any server, making it safe for comparing sensitive API responses, configuration files, and proprietary data.
Yes. The diff engine recursively compares objects and arrays at any depth. Nested changes are highlighted with path-based navigation so you can see exactly where in the structure a value changed, was added, or was removed.
A text diff compares raw lines of text character by character. A JSON diff parses the data first and compares it structurally — so reordering keys in an object or changing whitespace won't show as differences. Use JSON diff for structured data and text diff for source code or plain text.
Yes, completely free with no sign-up required. There are no usage limits, and all features — including deep comparison, array order ignoring, and result copying — are available at no cost.