Text Diff & JSON Diff

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Compare text, code, logs, config files and JSON objects online. Use Text Diff or JSON Diff mode with browser-local processing, no upload and no saved content.

Browser-local · No upload · No saved content

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Text Diff & JSON Diff overview

The Text Diff Checker & JSON Diff Tool compares two versions of content and highlights what changed. Text Diff mode works well for code snippets, logs, Markdown, config files and plain text. It shows added, removed and changed lines, with inline highlighting inside changed rows. JSON Diff mode parses both JSON inputs and recursively compares objects, arrays and values, then reports paths such as $.user.email or $.items[0].status.

Diff data is often sensitive: API responses, internal configuration, user fields, feature flags or production logs should not be uploaded just to find changes. KitVerse runs both text diff and JSON diff locally in your browser. You can compare two payloads for free, copy a diff summary and move between related developer tools like JSON Formatter, Base64 and JWT Decoder without sending the input to a server.

How to use Text Diff & JSON Diff

1Choose Text Diff or JSON Diff mode. Use Text Diff for text, code and logs; use JSON Diff for structured JSON objects or arrays.
2Paste the old content on the left and the new content on the right.
3Enable Ignore whitespace, Ignore case or Sort JSON keys when those differences are not important.
4Review the result: green means added, red means removed and amber means changed. JSON mode also shows the changed field path.

Troubleshooting

JSON mode fails to parse

Structured diff needs both sides to be valid JSON.

Repair common quote, comma or bracket issues in the JSON Formatter first.

Formatting creates noisy changes

Indentation and repeated spaces can hide meaningful edits.

Use Ignore whitespace in Text Diff, or JSON Diff with sorted keys for JSON payloads.

Array reorder creates many changes

JSON arrays are compared by index, so reordered lists can show many edits.

Confirm whether array order matters; if not, sort the source data before comparing.

Text Diff vs JSON Diff

Both modes run locally, but they fit different input types and review workflows.

Mode	Best for	Output	Notes
Text Diff	Plain text, code snippets, logs, Markdown and config files	Added, removed and changed lines with inline highlights	It compares text and does not understand JSON structure
JSON Diff	API responses, JSON config and object arrays	Added, removed and changed fields grouped by path	Both sides must parse as JSON; arrays are compared by position

Text Diff & JSON Diff examples

API response JSON diff

Old response

{ "user": { "role": "editor" }, "plan": "free" }

Diff result

$.user.role changed: editor -> admin
$.plan removed
$.limits added

Useful for checking added, removed or changed fields after an API update.

Config text diff

Old config

cache: enabled
retry: 2
owner: developer

Text diff

cache: disabled
retry: 3
owner: developer

Text Diff mode compares lines and highlights inline changes.

Use cases

API response debugging

Compare old and new API payloads to locate changed paths and values.

Config review

Check feature flags, thresholds and environment values before release.

Code snippet review

Quickly compare two code or log snippets without opening a full Git tool.

FAQ

Is my text or JSON uploaded to a server?›

No. Text Diff and JSON Diff run locally in your browser, and the input is not sent to KitVerse servers.

Does JSON Diff ignore object key order?›

Yes. JSON objects are compared by structure, with optional sorted key display. Arrays are still compared by index.

Can I compare API responses?›

Yes. Put the old response on the left and the new response on the right, then use JSON Diff to see added, removed or changed fields.

Can Text Diff ignore whitespace?›

Yes. Enable Ignore whitespace to normalize repeated spaces and line padding before comparison.

Can I compare code snippets?›

Yes. Text Diff works for code snippets and config files, but it is not a full Git diff and does not perform syntax-aware analysis.

What if JSON parsing fails?›

The tool shows whether the left or right side failed to parse. You can use the JSON Formatter first to repair common JSON issues.

Will my text or JSON be uploaded?›

No. Diff calculation runs locally in the browser and KitVerse does not store the input.

Does JSON mode ignore object key order?›

Yes. JSON objects are compared by structure, with optional sorted key display. Array order is still compared by position.