Diff Checker
Compare two texts and see the differences highlighted line by line.
of changes
Use the arrows or press N / P
About this tool
Compare two texts and see differences highlighted line by line. Additions, removals, and unchanged lines with line numbers. Free, browser-based.
Frequently asked questions
What is a diff checker?
Compares two texts and highlights additions (green) and removals (red) line by line.
What algorithm is used?
LCS (Longest Common Subsequence) for accurate minimum-edit results.
Can I compare code files?
Yes. Any text works: code, JSON, SQL, Markdown, config files, or plain text.