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JSON Compare – Best JSON Comparison Tool You Ever Need

Compare two JSON files locally in your browser. Highlight differences, missing keys, and value changes. No uploads.

All comparison happens in your browser. No data is uploaded.

Sync scroll Collapse unchanged

Tip: Long-press any collapsible arrow to copy the JSON block linked to that bracket. Performance: if Original or Modified JSON has 5000+ lines, compare switches to an efficient mode.

Original JSON

Upload JSON

Structure Preview

Modified JSON

Upload JSON

Structure Preview

Difference Summary

0 differences found

Structural 0

Value 0

Collection 0

Missing keys

Value changes

Type mismatch

Collection changes

Show only missing keys Show only value changes

Scroll to view more differences.

How it works

Paste or upload JSON into the Original and Modified panels.
Click Compare to see highlighted differences side by side.
Use the summary list to jump between changes.

JSON Compare – Best JSON Comparison Tool You Ever Need

Original JSON

Modified JSON

Side-by-side Comparison