Text comparison tool

Compare two versions of text and highlight exactly what changed. Great for API responses, configs, drafts, and logs.

String or text comparison

Version A
Version B

Common use cases

Use this when you want a fast, visual answer to “what changed?” — without opening an IDE, Git diff, or a heavyweight comparison tool. It’s especially handy for JSON/API responses, copied logs, configuration files, and text drafts.

If you don’t care about exact changes and just want a percentage, use the Similarity score tool instead.

How to use

  1. Paste the original text into Version A.
  2. Paste the updated text into Version B.
  3. Click Compare to see highlights and the “changed lines” summary.

FAQs

Is my data stored?
This tool sends the text to the server to compute a diff. It’s designed not to persist your pasted content.
Does it work for code?
Yes — it’s plain text. It highlights character-level differences and is useful for snippets, configs, and logs.
What does “changed lines” mean?
It counts how many line positions differ between A and B. It’s a quick summary, not a semantic measure.
Why are spaces highlighted?
Whitespace changes can matter (especially in JSON and code). This tool intentionally shows them.
How do I compare JSON more cleanly?
Format first using the JSON viewer, then compare the formatted outputs.
Looking for similarity instead of exact diffs?
Try the Similarity score tool.