Text Diff
Compare two versions of a text side by side. Changed lines are highlighted, with the exact words that were added or removed.
Free · No upload · 100% on your device
How to use Text Diff
- Paste the original text on the left, or open a file.
- Paste the changed text on the right.
- Choose the settings in the side panel. The comparison updates as you type.
- Copy or download the result.
Private by design. Everything you type, open or record is processed in this browser tab and is never uploaded to KittySuite.
About Text Diff
Lines are matched with the longest common sequence, the method used by version control, then changed lines are compared word by word. Ignore case or spacing to focus on real changes. The plain result uses + and − markers you can paste into a review.
Everything runs in this browser tab: your text is never uploaded or stored, and the result updates as you type. It keeps working offline once the page has loaded.
Text Diff: frequently asked questions
How do I compare two texts?
Paste the original on the left and the changed version on the right. Changed lines are highlighted with the exact words added or removed.
Can I ignore changes in spacing or capitals?
Yes. Turn on “Ignore case” or “Ignore spacing” to focus on real changes.
How are lines matched?
With the longest common subsequence, the method used by version control, then changed lines are compared word by word.
Can I share the result?
Yes. Copy the plain result with + and − markers or download it as a .diff file.