JSON Compare
Compare and find differences between two JSON documents online
Comparison Results
Compare Two JSON Documents
Paste JSON inputs side-by-side above, then click Compare to see side-by-side differences.
How to Compare JSON
- 1Input JSON
Paste JSON into both columns or upload local .json files.
- 2Run Comparison
Click the Compare button to run the comparison engine instantly.
- 3Analyze and Export
Scrutinize highlighted additions and deletions, or download/copy the diff results.
Quick Facts
Frequently Asked Questions
What is the JSON Compare tool?
It is a side-by-side comparison utility to find structural and value differences between two JSON objects.
How does the comparison algorithm work?
It parses both inputs, aligns keys, and highlights additions, deletions, and modified values.
Is my JSON data uploaded for comparison?
No. The diff calculations execute entirely client-side in your web browser.
Does it ignore formatting differences?
Yes. It normalizes both JSON structures (ignoring minor whitespace variations) to focus on actual data differences.
Can I compare large JSON structures?
Yes. It is optimized for structural comparisons, though massive datasets may require more browser memory.
How are differences highlighted?
Removed keys are highlighted in red, added keys in green, and changed values in yellow.
What happens if one of the inputs has invalid JSON?
The tool will notify you of syntax errors in the respective pane, as valid JSON is required for comparison.
Can I copy the diff results?
You can edit or copy individual panels after identifying differences.