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Diff Checker: Compare Text
Paste two versions of a text and see exactly what changed, line by line. Additions in green, deletions in red, unchanged context in between.
What the tool does
A diff compares two texts and reports the minimal set of line changes between them. Paste the original on the left and the new version on the right: added lines show in green, removed lines in red, and changed lines as a remove/add pair, with unchanged lines for context.
Worked example
Original has "The cat sat." and the modified has "The cat slept.": the diff shows one removed line and one added line, so you see at a glance that only the verb changed.
When to use it
Reviewing edited copy, checking what changed between config versions, verifying generated output, or comparing two drafts of anything text-based.
Planning estimate only. Results use the list prices shown and may differ from your actual bill. Terms
Frequently asked questions
What is a diff?
A line-by-line comparison showing which lines were added, removed or changed between two versions of a text. It is the same idea behind git diff and code review tools.
Does it compare character by character?
This tool diffs line by line, which is the standard for text comparison. Within changed lines you can see the full old and new versions side by side.
Is there a size limit?
Very large texts (hundreds of thousands of lines) may be too slow for the browser and will show a message. For code repositories, use git diff instead.
Is my text sent to a server?
No. Comparison happens locally in your browser, so drafts and configs stay private.