blockdiag - Man Page

generate block-diagram image file from spec-text file.


blockdiag [options] file


This manual page documents briefly the blockdiag commands.

blockdiag is a program that generate block-diagram image file from spec-text file.


These programs follow the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is included below. For a complete description, see the See Also.


show program's version number and exit

-h,  --help

Show summary of options

-a,  --antialias

Pass diagram image to anti-alias filter

-c FILE, --config=FILE

read configurations from FILE


write diagram to FILE

-f FONT, --font=FONT

use FONT to draw diagram


use FONTMAP file to draw diagram

-s,  --separate

Separate diagram images for each group


Output diagram as TYPE format


Do not output doctype definition tags (SVG only)


do not make transparent background of diagram (PNG only)

See Also

The programs are documented fully by


blockdiag was written by Takeshi Komiya <>

This manual page was written by Kouhei Maeda <>, for the Debian project (and may be used by others).


May 9, 2011