Text Diff
Find differences between two texts
How to use Text Diff
- Paste your original text on the left and the modified version on the right.
- The differences appear below automatically.
- Switch between side-by-side and unified views.
- Use ignore options to skip whitespace or case differences.
Using diff for writing
Writers use diffs to compare draft versions, check revisions from editors, or confirm that feedback was applied correctly. A visual diff makes it obvious what changed — much faster than re-reading two full documents.
For legal and contractual documents, a diff is essential. Even a small wording change can alter meaning significantly, and seeing the changes highlighted removes ambiguity about what was modified.
For translation review, academic paper revisions, or tracking customer feedback on proposals, a diff tool turns hours of comparison into minutes of scanning.
Frequently Asked Questions
What is the difference between this and the Developer Tools diff checker?
They share the same engine. This page is tuned for prose and general text; the developer one is tuned for code. Pick whichever feels right for your content.
Can I diff very long texts?
Yes, within reason. Texts up to a few hundred thousand characters perform well in modern browsers. For truly massive comparisons, use desktop tools.
Does it detect reorderings?
No. The algorithm finds additions and deletions line-by-line. If text is moved from one spot to another, it shows as a deletion in one place and an addition in another, not as a "move."