Free text comparison tool
Compare two texts.
Understand every change.
Paste the original and revised versions to see exactly what was added, removed, rewritten, or moved.
- Free to use
- No account
- Texts are not stored
Read changes in context
See what changed, not just which lines differ
A moved paragraph is not a deletion followed by an addition. A rewritten sentence belongs beside the wording it replaces. DiffToken keeps those relationships visible.
Review it your way
Choose the view that fits the task
Move between three views without losing your place or running the comparison again.
Unified
Read the revised document as one continuous flow with changes marked in place.
Side by side
Keep the original and revised versions visible together for a broad review.
Line by line
Align corresponding lines to inspect rewrites, small edits, and moved content closely.
Useful beyond a quick diff
Built for the revisions you actually review
Editorial revisions
Compare an author's draft with the copy-edited version. Catch rewritten headlines, removed claims, and paragraphs moved for a better flow.
Contracts and policies
Review two versions of a clause or policy. Find changed dates, amounts, obligations, and exceptions without rereading every unchanged line.
AI-assisted rewrites
Compare a generated rewrite with your source. See what the model rephrased, omitted, added, or moved before you accept the result.
Documentation and localization
Check release notes, help articles, translated copy, or configuration excerpts after an update.
Privacy by default
Your text is compared, not collected
Your text is processed only to calculate the comparison you requested.
- No account is required
- Texts are transmitted over HTTPS
- Compared text is not retained after processing
For highly sensitive or regulated information, use an approved offline comparison tool.
Common questions
Text comparison FAQ
Does DiffToken store my text?
No. Your text is processed to calculate the comparison and is not retained after processing.
Can it detect a passage moved elsewhere?
Yes. Enable move detection to link relocated content between its previous and new positions.
What is the difference between word and character precision?
Word precision highlights complete words and suits most reviews. Character precision refines similar words down to the letters that changed.
Which comparison view should I use?
Unified is best for continuous reading, side by side keeps both documents visible, and line by line aligns corresponding lines for close review.
Can I compare long documents?
Yes. For very long documents, comparing one section at a time can make the result faster to scan and easier to review.