Compare two texts and see what changed, line by line.
Comparing two versions of a document, piece of code, or block of text by eye is slow and error-prone, especially when the changes are small but scattered throughout a large amount of text. A diff checker automatically highlights exactly what was added, removed, or changed between two versions, line by line, which makes reviewing edits far faster and more reliable than manual comparison.
This is a core part of software development workflows (reviewing code changes) but is just as useful for comparing contract revisions, tracking edits between draft versions of a document, or spotting differences between two similar pieces of text.
Paste your original text into one box and the revised version into the other. The tool compares them and highlights additions, deletions, and changes so you can see exactly what's different between the two versions at a glance.
Comparisons are typically shown line by line, which makes it easier to see structural changes in documents, code, or paragraphs, though smaller inline changes within a line are also highlighted.
Yes, the tool works with any plain text, including source code, configuration files, or written documents.
Depending on the content, differences in spacing or line breaks can show up as changes, since the comparison is based on the exact text provided.
No, the comparison runs entirely in your browser, so the text you paste isn't transmitted or stored externally.
Comparing two drafts of a contract or essay to quickly spot every wording change between revisions, without having to manually reread both versions side by side.