Quick Answer
This text comparison tool takes two versions of any text, compares them line by line, and highlights what was added, removed or left unchanged — plus an overall similarity score. It is the fastest way to review a colleague's edit, check what changed in a config file, or verify that a draft matches its final version.
Key Takeaways
- Line-level diff with added, removed and identical rows color-coded.
- Similarity percentage at a glance.
- Live comparison — results update as you type in either box.
- Handles large texts smoothly in your browser.
What Is a Text Diff?
A diff is a side-by-side comparison that isolates what actually changed between two versions of a text. Instead of rereading both documents hoping to notice a difference, you get a precise list: these lines were added, these were removed, these are identical. The technique powers version control systems everywhere, and the same idea works just as well on prose, lists and config files.
How to Use the Tool
- Paste Version A into the left box.
- Paste Version B into the right box.
- Read the diff — green for added, red for removed, plain for unchanged.
- Check the similarity score for a quick overall picture.
Reading the Results
Rows are color-coded: added rows exist only in Version B, removed rows exist only in Version A, and unchanged rows appear dimmed in between. The counters above tell you how many lines changed, and the similarity percentage gives a single number for "how close are these two texts." Note that a single changed word inside a long line shows as the whole line changing — that is normal line-level diff behavior.
Where Text Compare Helps
- Reviewing edits: see exactly what a collaborator changed in your draft.
- Config and data files: find the one line that changed between environments.
- Version rollback: confirm a restored backup matches expectations.
- Copy accuracy: verify a pasted excerpt was not silently altered.
Conclusion
Reading two documents to find one difference is a waste of attention. Paste them above and get the answer in a second. For a numeric take on how similar two texts are, the similarity checker is the perfect companion.