How do I compare two versions of text and see the differences?
Paste two texts side by side, the tool highlights what was added, what was removed, and what stayed the same. The classic feature you know from Word ("track changes") or version control systems (Git).
Perfect for comparing contract versions, article drafts, configuration files, or seeing what a colleague changed in your document.
How to use it
- In the left field, paste the original text ("before" version).
- In the right field, paste the new version ("after" version).
- The tool immediately highlights differences: green = added, red = removed, uncolored = unchanged.
- Below the texts you see stats: how many lines were added, removed, kept.
When this is useful
Situations where you need to see "what changed":
- Comparing two contract versions: you sent a contract to the counterparty, got it back with changes. Instead of reading line by line, see the changes here at once.
- Checking what a colleague changed in a document: after an essay review, after editing a shared text.
- Auditing changes in a config file: "what changed between the old and new version of this file?".
- Comparing translations: original article vs translated. See what was added or skipped in one of the versions.
- Note versions: "what did I add since yesterday?". Paste yesterday's and today's version.
- Education, how version control works: IT students see what Git shows on commits. Same thing, without the Git.
To count words in each version, use our text counter. To clean up formatting before comparing, see whitespace cleaner.
Questions and answers
The tool uses the Longest Common Subsequence (LCS) algorithm. In plain words: it finds the maximum number of identical lines in both texts, and marks the rest as "added" or "removed". Same algorithm Git, GitHub, and most file-comparison tools use.