Text comparer
Diff two blocks of text word-by-word and highlight every addition and removal — side-by-side or unified, entirely in your browser.
Open Text comparer →What is the text comparer?
A free, private text diff tool that compares two blocks of text word by word and highlights every addition and removal. View the differences side by side or as a unified diff. Everything happens in your browser, so your text is never uploaded — handy for checking edits to drafts, contracts, code snippets or pasted notes.
How to use Text comparer
- Paste both versions — Put the earlier text in the Original box and the newer text in the New box. A live word count sits under each one.
- Compare the texts — Click Compare texts. The tool diffs them word by word and highlights what changed.
- Choose how to view it — Switch between Side by side and Unified to read the changes the way that suits you, with added, removed and unchanged words colour-coded.
- Copy the changes — Use Copy added or Copy removed to lift just the changed words out of the result.
Frequently asked questions
Is my text uploaded to a server?
No. The comparison runs entirely in your browser, so both blocks of text stay on your device and the tool works offline after the first load.
Does it compare word by word or letter by letter?
It diffs at the word level, so whole words are marked as added or removed rather than individual characters.
What's the difference between side-by-side and unified view?
Side by side shows the original and new text in two columns; unified merges them into one stream with additions and removals marked inline.
Can I swap the two sides?
Yes. The Swap button switches the Original and New text so you can flip which version is treated as the baseline.
Tips
- Use Swap if you pasted the versions in the wrong order — no need to re-paste.
- The unified view is best for long passages where two columns get hard to follow.
- Copy removed is a quick way to pull deleted wording out for a change log.