Derrick Foos's Text Diff Tool

Compare two texts or files side-by-side or as a unified diff. Drop files, paste configs/logs/code, ignore whitespace, and copy a patch-style summary. Everything stays on this device.

Ignore whitespace Ignore case Trim line ends Inline char highlight Context lines

Strip regex before compare — matches are removed from each line for comparison only (display still shows original text)

Skip lines matching regex — entire lines matching this pattern are ignored in the diff

Presets for strip: click a chip to fill the strip box. Invalid regex shows an error on Compare.

A (original / left) 0 lines

Drop a file here or paste below

B (modified / right) 0 lines

Drop a file here or paste below

Paste or drop two texts, then click Compare.

All comparison runs locally. No data is uploaded. Large files (thousands of lines) may be slower.