JSON Diff

Comparison modes

• Structural mode: lists each difference by JSON path (e.g. a.b[0]) with type (added/removed/modified).
• Text mode: shows line-by-line differences similar to git diff.
• Deep recursive comparison of objects and arrays; key order does not matter.
• Comparison runs entirely in the browser. No input is uploaded.

Example: field modification

Structural mode locates differences by path and is unaffected by formatting. Text mode is sensitive to indentation, so format both sides first for best results.

Left:  {"id":1,"name":"Ada","role":"admin"}
Right: {"id":1,"name":"Ada","role":"editor","active":true}

Diff:
  role:   admin    -> editor
  active: (added)  -> true

Limits

• Number precision: JavaScript uses IEEE 754 double-precision; very large integers may lose precision.
• Same value but different type (e.g. 1 and "1") is treated as a difference.
• Array order matters: elements with the same values but different positions are flagged as differences.

Frequently asked questions