sdiff - side-by-side merge of file differences


sdiff [OPTION]... FILE1 FILE2


Side-by-side merge of differences between FILE1 and FILE2.

Mandatory arguments to long options are mandatory for short options too.
, --output=FILE

operate interactively, sending output to FILE

-i, --ignore-case

consider upper- and lower-case to be the same

-E, --ignore-tab-expansion

ignore changes due to tab expansion

-Z, --ignore-trailing-space

ignore white space at line end

-b, --ignore-space-change

ignore changes in the amount of white space

-W, --ignore-all-space

ignore all white space

-B, --ignore-blank-lines

ignore changes whose lines are all blank

-I, --ignore-matching-lines=RE

ignore changes all whose lines match RE


strip trailing carriage return on input

-a, --text

treat all files as text

-w, --width=NUM

output at most NUM (default 130) print columns

-l, --left-column

output only the left column of common lines

-s, --suppress-common-lines

do not output common lines

-t, --expand-tabs

expand tabs to spaces in output


tab stops at every NUM (default 8) print columns

-d, --minimal

try hard to find a smaller set of changes

-H, --speed-large-files

assume large files, many scattered small changes


use PROGRAM to compare files


display this help and exit

-v, --version

output version information and exit

If a FILE is ’-’, read standard input. Exit status is 0 if inputs are the same, 1 if different, 2 if trouble.


Written by Thomas Lord.


Report bugs to: bug-diffutils [AT]
GNU diffutils home page: <>;
General help using GNU software: <>;


Copyright © 2023 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <>;.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.


cmp(1), diff(1), diff3(1)

The full documentation for sdiff is maintained as a Texinfo manual. If the info and sdiff programs are properly installed at your site, the command

info sdiff

should give you access to the complete manual.