Text Diff Checker
Compare two texts side-by-side with line, word and character diff
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Paste two pieces of text and instantly see what changed — added, removed and modified lines, words or characters. A fast browser-based diff viewer for code reviews, document comparisons, copy-paste audits and writing edits.
How to compare two texts
1
Paste both versions
Drop the original and the modified text into the two fields.
2
Pick granularity
Switch between line, word and character diffing.
3
Review changes
Inspect the highlighted output and stats summary.
Line, word, char
Choose the granularity that matches your task.
Color highlights
Green for additions, red for deletions, side-by-side display.
Stats summary
Total added/removed lines and words at a glance.
Local only
Diffs happen in your browser using the diff library — nothing is uploaded.
FAQ
Line diff shows whole lines that changed. Word diff highlights changed words within unchanged context. Char diff highlights individual characters — useful for typo or whitespace audits.
Yes. Paste both file contents into the fields. For large files prefer line diff for readability.
Line endings are normalized before diffing, so mixed CRLF/LF won't cause false positives.
No. Comparison runs entirely in your browser using the jsdiff library.
Practical limit is around a megabyte. Beyond that, the diff algorithm slows down significantly in any tool.