Text Compare
Compare two texts side-by-side and highlight differences by line, word or character
100% free. Runs entirely in your browser - your files and data never leave your device and nothing is uploaded to any server.
About this tool
Compare two blocks of text side-by-side and highlights exactly what's different between them - added, removed, or changed content - useful for reviewing document edits, comparing two versions of writing, or spotting subtle differences between similar-looking text.
How to use this tool
- Paste old and new versionsProvide both texts in separate panels for diff analysis.
- Run comparisonHighlight inserted, removed, and modified segments.
- Inspect critical changesReview semantic edits and accidental regressions quickly.
- Export or copy findingsShare differences with collaborators for approval cycles.
How to see what changed in a text
Paste the original into one box and the edited version into the other. Differences are highlighted as you type: choose line mode to see which lines changed, or character mode to spot a single changed letter, number or punctuation mark.
It is useful for checking what an editor changed in an article, comparing two versions of a contract clause, or confirming that a pasted text matches the original exactly.
Key features
- Makes subtle edits visible immediately.
- Useful for contracts, docs, and content reviews.
- Reduces missed-change risk in manual proofreading.
- Speeds collaborative revision workflows.
Common uses
- Reviewing legal/policy document revisions.
- Comparing article drafts before publication.
- Checking generated content changes after edits.
- Validating configuration/template modifications.
Tips for better results
- Normalize whitespace first to reduce noise-only diffs.
- Compare focused sections for very large documents.
- Review deletions carefully, not only additions.
- Use clear labels for baseline vs revised versions.
Mistakes to avoid
- Comparing texts with different encoding/line-ending styles blindly.
- Ignoring structural differences hidden by formatting changes.
- Using diff output without contextual editorial review.
- Copying panels in wrong order and misreading results.
Frequently asked questions
They serve a very similar purpose - comparing two texts and highlighting differences. This version is positioned for general text comparison (documents, writing), while the Diff Checker leans toward developer/code use cases, though both work on any text content.
Good text comparison highlights specific words/characters that changed within a line, not just flagging that "something in this line is different" - giving you a precise view of exactly what changed.
Yes, though very large documents may take a moment longer to process and the visual diff can become harder to scan - comparing smaller, focused sections often gives clearer, more actionable results.
Paste your original on one side and the edited version on the other. Highlighted additions and deletions show every change, so you can accept or push back on each one.
Paste plain text into both sides, and trim extra spaces and line breaks first. Differences in spacing otherwise show up as changes even when the wording is identical.
Yes. Paste the source text and the quoted version - any altered word, missing line or changed number is highlighted.