Is the text diff checker free?

Yes — 100% free, no signup, no usage limits.

Does it save my data?

No. Inputs are processed in your browser and never uploaded to a server.

Yes. The interface is fully responsive and works on iOS and Android.

Yes. The line-based diff works for any text including source code, JSON, Markdown, and plain prose.

Paste two blocks of text and see line-by-line additions, removals, and unchanged lines highlighted in color.

OriginalChanged

+2 −2 line changes

−The quick brown fox
+The quick red fox
 jumps over
−the lazy dog
+the sleepy dog

A text diff checker compares two pieces of text and highlights the differences — added lines in green, removed in red, unchanged in plain.