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Paste two texts and instantly see every addition, deletion and unchanged line — with split and unified views.
Paste two texts above to see their differences
Supports line-by-line diff with split and unified views
Compare config files, YAML, JSON or code before deploying to spot unintended changes.
Track revisions between drafts. See exactly what changed between versions of an article.
Compare expected vs actual output in test results or API responses.
Identify changes between contract revisions, policy documents or agreements.
Compare submitted assignments against originals to spot changes or check plagiarism.
Compare source text revisions to update only the changed parts of a translation.
The tool uses the Longest Common Subsequence (LCS) algorithm — the same core approach used by Git and Unix diff. It finds the minimal set of additions and deletions needed to transform text A into text B.
Split view shows the two texts side by side with differences highlighted in their respective columns. Unified view shows a single column with additions in green and deletions in red — similar to a Git diff.
When enabled, leading and trailing spaces on each line are stripped before comparison. Useful when comparing code that was reformatted but not changed logically.
Treats uppercase and lowercase as identical when comparing. 'Hello' and 'hello' will be treated as the same line.
Yes! The diff checker works on any plain text including code, prose, CSV data, JSON (paste it unformatted), and more.
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