How to Compare Two Texts and Find the Differences (Free)
When two versions of the same text look almost identical, spotting the changes by eye is slow and error-prone. A text diff checker compares them and highlights exactly what was added, removed or changed — instantly. It's invaluable for editors, writers, developers and anyone reviewing edits to a contract or document. This guide shows how to compare two texts for free and read the results.
🔀 Try the Text Diff Checker now — freeOpen →Diffing turns "something changed but I'm not sure what" into a clear, highlighted answer. It saves you from re-reading whole documents to find a one-word edit, helps you review someone else's changes precisely, and catches accidental deletions before they cause problems.
What a diff shows you
A diff compares an original and a revised version line by line (and often word by word) and marks the differences: additions, deletions and changes. Typically additions are shown in one color and deletions in another, so you can see at a glance what moved between the two versions.
This is far more reliable than skim-reading. Even a single changed digit in a price, date or code value stands out immediately, which is exactly the kind of small but important edit the human eye tends to miss.
Everyday uses
- Review edits between two drafts of an article or email.
- See what a collaborator changed in a shared document.
- Check two versions of a contract for altered clauses.
- Compare snippets of code or configuration.
- Spot copied passages when checking for duplication.
Step-by-step
Common mistakes to avoid
Pro tips
Frequently asked questions
What does the diff highlight?
It highlights additions, deletions and changes between the two versions, usually in different colors.
Is it free and private?
Yes — free with no sign-up, and the comparison happens in your browser, so nothing is uploaded.
Can I compare code?
Yes — it works for code and configuration too; watch for whitespace differences that matter in some languages.
Can it check for plagiarism?
It can highlight identical passages between two texts you provide, which helps spot copying, though it isn't a web-wide plagiarism scanner.
Does the order matter?
Yes — put the original first and the revision second so additions and deletions are labeled correctly.
A text diff checker instantly reveals what changed between two versions, so you never miss a small but important edit. Paste both versions, read the highlights, and review with confidence — free and private in your browser.