Text Diff
Compare two texts line by line. Added lines are green, removed lines are red. Ignore case or extra spaces, then copy the unified diff.
4 lines
5 lines
+2 · -1 · 3 unchanged
How it works
Paste both versions
Put the original on the left and the edited copy on the right. The comparison updates as you type.
Tune the match
Ignore letter case or extra spaces if you only care about wording. Swap sides to reverse original and changed.
Read and copy
Green lines were added, red lines were removed. Copy the unified diff for a review, ticket, or commit note.
What is a text diff?
A text diff shows how one version of a document changed into another. Writers use it to review edits, developers to check patches, and editors to catch accidental deletions. This page runs the comparison locally so drafts never leave the browser.
Why use this tool
- Live line-level diff in this tab
- Added lines in green, removed lines in red
- Ignore case or collapsed whitespace
- Swap sides, load a sample, copy unified output
- Counts of added, removed, and unchanged lines. No daily cap
Questions
What does Text Diff do?
It compares two blocks of text line by line and highlights what was added or removed, similar to a simple git diff.
How do I use Text Diff?
Paste original text on the left and the new version on the right. Green means added, red means removed. Copy the result when you need it elsewhere.
Is this a character-level or word-level diff?
It is line-level. A changed sentence counts as one removed line and one added line, even if only a few words changed.
What do Ignore case and Ignore extra spaces do?
Ignore case treats Hello and hello as the same line. Ignore extra spaces trims and collapses runs of whitespace so indentation-only changes drop out of the diff.
Is there a size limit?
Each side is compared up to 800 lines so the page stays responsive. Longer files should be split or compared in a desktop diff tool.
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Tools stay free. A one-time tip is optional and helps keep them running.
When to use Text Diff
Text Diff is one of those utilities you open for a few minutes, finish the task, and close without leaving a trail of uploads. Compare two texts line by line. Writers, students, and support teams paste drafts here to measure, reshape, or clean text without opening a heavy office app. Compared with installing a desktop suite only for text diff, a dedicated page keeps the interface small and the intent obvious. Quota cookies may still track anonymous daily free-plan uses. That is different from receiving your file bytes or pasted text. This page has no daily free-plan cap, so you can run it as often as you need. If a free-plan limit applies, the workspace shows remaining uses before you commit a download, so you are not surprised after a long wait.
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