Documents
Document Diff Checker
Paste two drafts or open text files. One comparison lines them up and marks added, removed, and changed lines. Use it for a document draft, a config file, or a changelog. Trailing spaces can be ignored. The texts are not stored.
Quick start
- 1
Paste both versions
Put the original on the left and the revision on the right, or open a text file for either side.
- 2
Choose the space rule
Turn on Ignore trailing spaces when only the end of a line changed.
- 3
Compare
Added lines, removed lines, and changed pairs are marked. Unchanged lines stay in place.
- 4
Export
Copy or download the report. The texts are not stored.
Features
Side by side
Original and revised lines stay aligned, with line numbers on each side.
Added, removed, changed
A removed line paired with the new line beside it is marked as changed.
Drafts and configs
Paste text or open a .txt, Markdown, JSON, YAML, or log file on either side.
Specifications
- Marks
- Added, removed, changed, unchanged
- Limit
- 2,000 lines · 200,000 characters each
- Spaces
- Trailing spaces optional
- Privacy
- Not stored
Use cases
- Check a draft against the previous version.
- See what changed in a config file.
- Review a changelog before you publish it.
Frequently asked questions
What counts as a changed line?
A removed line that is paired with the added line beside it is marked changed. Extra lines on only one side stay added or removed.
Does this compare Word or PDF files?
No. Paste the text, or open a plain-text file such as .txt, Markdown, JSON, YAML, or a log.