Free · no signup · browser-local
Line-by-Line Text Diff Checker for Two Drafts
Paste the original and revised text to see which lines were added, removed or kept. Compare up to 200 lines per version when reviewing edits.
Your text
Result
Getting started
Paste the old and new versions into separate boxes, then inspect the differences.
Before you use the result
Comparison is line-based and limited to 200 lines per side, not word-level editing.
Try an example
Compare “first old” with “first new” to see one removed and one added line.
How it works
A longest-common-subsequence comparison preserves unchanged lines in order.
Frequently asked questions
Compare two drafts line by line and see additions and removals.
How do I use Text Diff Checker?
Paste the old and new versions into separate boxes, then inspect the differences.
Does this tool upload my data?
Inputs and files are processed in your browser. Page-view analytics do not contain your tool input.
What should I check before using the result?
Comparison is line-based and limited to 200 lines per side, not word-level editing.