JSON diff

Compare values and locate changes.

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Privacy details

JSON diff processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

Copy link includes the inputs you choose to share in the address. Anyone with that link can reopen them. Files and generated results are excluded. Password and key tools share settings only.

JSON input

Compare with JSON

Options and local file

Open a text file on this device

Optional settings apply only to this tab.

Your result

Reset reloads the tool with its starting values and releases open files and device controls. Saved drafts stay on this device until you delete them.

Links include your inputs and settings. Anyone with the link can see them, so leave out private text. Files and generated results are left out; random draws run again.

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Updated 2026-09-20

JSON diff explained

Compare parsed JSON values while ignoring object-key order and insignificant whitespace. Each addition, removal or changed value includes a JSON Pointer path. Arrays are compared by index, so reordered array values are changes.

Next: JSON formatter

Next: JSON tree viewer

Next: ENV to JSON converter

A worked example

Comparing {"score":8} with {"score":9} reports one changed value at /score, with 8 before and 9 after.

Before you use the result

Duplicate keys and unsafe large integers are rejected. This is a value comparison, not a line diff or a move detector. Numbers use JavaScript decimal precision; quote exact financial decimals.

Cite this page

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ToolOctopus. “JSON diff.” Updated 2026-09-20. https://tooloctopus.com/json-diff.

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