Paste original and changed text to see exactly what was added, removed, or kept — highlighted line by line with live counts.
Differences appear here instantly as you type...
How is this different from List Comparer?
List Comparer finds set overlap; Diff Checker shows ordered line-by-line changes with context, like git diff.
Does it work for code?
Yes — paste two versions of code, config, or articles; whitespace-insensitive mode helps with reformatted files.
Is there a size limit?
Lists up to 1000 lines use precise LCS diff; larger inputs fall back to fast multiset comparison.
