About the Text Diff Checker
Paste two versions of a text and see additions and deletions highlighted line by line, with a summary of how many lines changed. Comparison runs locally, so even confidential documents are safe.
Useful for reviewing document revisions, comparing config files and spotting exactly what changed between two versions.
How to use the Text Diff Checker
- Paste the original text on the left.
- Paste the changed text on the right.
- Click "Compare" — removed lines show red, added lines show green.
Common uses
Reviewing edits between document versions
Comparing configuration files
Checking contract or policy changes
Frequently asked questions
How does the comparison work?
It uses a longest-common-subsequence algorithm on lines — the same approach used by git diff.
Can I compare code?
Yes, the monospace view makes code comparison easy, and the content never leaves your machine.
Related tools
Word Counter
Count words, characters, sentences, paragraphs and reading time in real time.
Text ToolsCase Converter
Convert text between UPPERCASE, lowercase, Title Case, Sentence case and more.
Text ToolsDuplicate Line Remover
Remove duplicate lines from any list or text, with sorting and trimming options.
Text ToolsText Reverser
Reverse text by characters, words or lines instantly.
Text Tools