JSON Diff

Compare two JSON documents and highlight structural differences in LocalKit. Review API payloads locally—documents stay in your browser with nothing uploaded.

Interactive controls load with JavaScript. Processing stays in your browser—nothing is uploaded.

Loading tool…

How to use

  1. Open JSON Diff — Load the tool.
  2. Paste left & right — Provide both JSON documents.
  3. Run compare — Review added/removed/changed paths.
  4. Copy report — Share or archive the diff text.

Limits

Requires JavaScript. Extremely large inputs may slow the browser tab. Results depend on your browser APIs; there is no server-side processing quota because nothing is uploaded.

When to use

When you want a quick, free utility without creating an account or sending content to an online converter.

When not to use

When you need server-side integration, batch automation at scale, or certified compliance tooling.

Privacy note

Tool inputs are processed in your browser only. Theme, language and favorites may use localStorage; hosting may keep standard access logs (IP, UA, URL) without tool payloads.

FAQ（5）

Deep vs shallow?

The tool walks object trees and reports added/removed/changed paths.

Array order?

Arrays are compared by index; reordered items appear as changes.

Privacy?

Both JSON documents stay in the browser.

Pretty output?

Differences are listed as human-readable path ops you can copy.

Huge JSON?

Very large trees may slow the UI—compare focused subsets when possible.