Diff Checker
This line-by-line diff tool compares your original and changed text right in the browser, highlighting every added, removed, and unchanged line so you can quickly review what changed — no upload required.
No differences found — the texts are identical.
How it works
Paste your original text on one side and the changed version on the other. The tool splits both into lines and computes the longest common subsequence to find the smallest possible set of additions and removals, then highlights the result line by line.
Tip
Diffing works best when both texts are broken into lines the same way — pasting from the same source (like two versions of a config file or an article draft) gives the clearest comparison.
Is there a size limit?
To keep comparisons instant, each text is capped at 2,000 lines. For anything larger, use a dedicated diff tool or version control instead.
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