chkdvifont [-s] [-c] [-{f|F}<font_data_file>] [-t] tfm_file_name
chkdvifont [-s] [-c] [-{f|F}<font_data_file>] [-p] font_file_name
Option -d: force DVI mode
Option -t: force TFM/OFM mode
Option -p: force other FONT mode
By default, the mode is guessed from the file extension.
$ chkdvifont sample.dvi
dvi file name = sample.dvi
comment = TeX output 2007.11.24:0632
factor converting to 10^{-5}m = 25400000/473628672
magnification = 1000
maximum width = 26083328 scaled points = 398 points
maximum height+depth = 11099063 scaled points = 169 points
maximum stack depth = 4
number of pages = 13
page size = 14.0 cm x 6.0 cm
page size magnificated = 14.0 cm x 6.0 cm
Font 14
checksum = 44D3ED74
design size = 1132462 scaled points = 17 points
space size = 1630536 scaled points = 24 points
magnification = +magstep2
font name = cmr17
Font 7
checksum = 4BF16079
design size = 655360 scaled points = 10 points
space size = 655360 scaled points = 10 points
font name = cmr10
$ chkdvifont jis.tfm
"jis" is a jfm file : 0 -> 5
checksum = 00000000
design size = 10485760 2^{-20} points = 10 points
$ chkdvifont jis.vf
"jis.vf" is in VF format
checksum = 00000000
design size = 10485760 2^{-20} points = 10 points
Mapped Font 1
font dsize = 10485760 2^{-20} points = 10 points
font at = 0.962216
font name = rml
Listing the fonts used in a DVI file (as shown in the first example) is almost equivalent to dvifontlist in TeX-Guy package <http://www-masu.ist.osaka-u.ac.jp/%7Ekakugawa/TeX-Guy/> and a script dviinfox <https://ctan.org/pkg/dviinfox>. I don't know any alternatives for obtaining information about TFM, OFM, VF and other font formats.