Diff Compare
Compare text, spot changes and review differences line by line.
How to compare two texts
- Paste the original version into the left panel and the modified version into the right panel.
- The comparison runs automatically as you type and updates in real time.
- Look for rows marked as added, removed, or unchanged in the result area.
- Use the counters to see how many lines changed and copy the result when you finish.
- Paste clean, similarly formatted texts so line numbers point to meaningful changes.
When it helps
- Reviewing changes between two versions of a document or config file.
- Spotting accidental deletions or additions in source code.
- Comparing draft revisions before you share or publish them.
- Confirming that an edited text matches the intended changes.
- Comparing two versions of a translation or a written contract.
Frequently asked questions
Is the text I paste kept private?
Yes. Both texts are compared only in your browser and are never uploaded. The page has no server storage or tracking.
What are the limitations?
The tool compares line by line, so changes inside one long line appear as a removed and an added line rather than a word-level edit. Very large inputs may slow down your browser.
Does it update automatically?
Yes. The comparison refreshes as you type in either panel, so you can see the result without pressing a button.
What do the numbers mean?
The counters show how many lines were added, how many were removed, and how many stayed the same between the two texts.
Can I copy the comparison?
Yes. The copy button places the visible result on your clipboard so you can paste it into a note or report.
Why does one edit show as two lines?
When a line changes, the tool marks the old version as removed and the new version as added. This is how a line-based diff works. If you change a single word in a long line, both lines appear in the result. Splitting long lines into shorter ones gives a finer comparison.