Diff checker
Paste two versions of a text and see what changed, line by line, with the changed words marked. It runs in your browser, so nothing you paste is uploaded.
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| 1 | + | Refunds are available within 30 days. | |
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Free, with no sign-in. It runs in your browser, and what you paste is never sent to our servers.
How to use it
- 1Paste the earlier version in the first box and the later one in the second.
- 2Read the result underneath. Green lines were added, red lines were removed, and the words that changed inside a line are marked in a stronger color.
- 3Tick Ignore case, or Ignore leading and trailing spaces, when those differences do not matter to you.
How the comparison works
The checker compares the two texts line by line and finds the smallest set of added and removed lines that turns one into the other. When a block of lines was replaced by the same number of new lines, it compares each pair again word by word. That way you see that one word changed, and not the whole sentence.
The first column of numbers belongs to the original text and the second to the changed text. Windows and Unix line endings count as the same.
What it is good for
Contract and policy edits, two versions of a config file, a paragraph before and after an editor touched it, or two API responses that should match. For source code under version control, your editor or git diff will serve you better, because they know the history.
Run it from any page
Text Diff is also a command in UtilEngine, our launcher extension for Chrome. Press your shortcut on any page and it opens right there, with no tab to switch to. It is one of the 29 developer tools in the launcher. This page stays free either way.
Diff checker questions
Is my text uploaded anywhere?
No. The comparison runs in your browser. The two texts are never sent to our servers.
Does it show changes inside a line?
Yes, when a line was replaced by another line. The words that differ are marked in a stronger color, in red on the removed line and green on the added one.
Can I ignore whitespace?
You can ignore spaces at the start and end of each line. Differences in spacing inside a line still count.
Can it compare two files?
It compares text you paste. Open each file, copy its contents, and paste them into the two boxes.
Is there a size limit?
There is no fixed limit. Very long texts take longer, because the work happens on your own computer.
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