Code & Text Diff Checker

Compare two blocks of text, JSON, or code side-by-side and spot every change — unified diff, 100% in your browser.

100% In-Browser & Private — your data never leaves this device

PeachTools Pro

Batch processing, unlimited files, ad-free.

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How to use the Code & Text Diff Checker

  1. Paste the original text or code into the left panel.
  2. Paste the modified version into the right panel.
  3. Review highlighted additions and deletions in the unified diff.
  4. Copy or download a .patch when you need to share the change set.

FAQ

Is my code uploaded to a server?
No. Diffing runs entirely in your browser with the jsdiff library.
What is the free word limit?
Free tier compares up to 5,000 words across both inputs. PeachTools Pro removes the cap and adds multi-file diffs.

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