JSON Diff
Paste two JSON values and compare them with a structural summary and an optional formatted line diff. Everything stays in your browser.
How it works
Click Compare after pasting valid JSON on both sides. The Structural tab lists each change with a path (dot and bracket notation), change type, and short previews. The Formatted line diff tab shows pretty-printed JSON with keys sorted so small object reordering does not add noise.
For package.json dependency summaries (semver-aware), use the Package.json and Lockfile Diff tool, which reuses this structural engine for full-file views.
Frequently asked questions
Is my JSON uploaded?
No. Parsing and diff run entirely in your browser.
How is this different from a text diff?
Structural mode shows changes by JSON path (keys and array indices). The line diff tab compares pretty-printed JSON with stable key ordering.
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