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JSON Diff Tool

Compare two JSON files and see differences highlighted. Line-by-line diff with color coding. Free online.

About this tool

Paste two JSON documents and see a line-by-line comparison with additions highlighted in green and removals in red. Both documents are automatically formatted before comparison, so differences in whitespace are ignored. This is essential for debugging API changes, comparing configuration versions, or reviewing data transformations.

FAQ

Does it ignore whitespace differences?

Yes. Both JSON inputs are parsed and re-formatted before comparison, so differences in indentation, spacing, and key ordering do not produce false diffs.

Can I compare very large JSON files?

The diff tool works with moderately sized JSON (up to a few MB). For very large files, performance depends on your device since all processing happens in the browser.

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