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.TH "tinyxxd" 1 "1 Apr 2026" "" ""
.SH NAME
tinyxxd \- A hexadecimal, binary, and ASCII dump utility with color support
.SH SYNOPSIS
.B tinyxxd
[options] [infile [outfile]]
.sp
.B tinyxxd
\-r [-s [-]offset] [-c cols] [-ps] [infile [outfile]]
.sp
.SH DESCRIPTION
.B tinyxxd
is a versatile utility for creating hex, binary, and ASCII dumps from binary files. It can also reverse these dumps back into binary form. Additionally, it supports various output formats, including C include files and PostScript.
.B tinyxxd
enhances readability by optionally colorizing the output, respecting the NO_COLOR environment variable.
.sp
.SH OPTIONS
.TP
.B \-a | \-autoskip
Toggle autoskip mode. In this mode, a single `*` replaces lines that consist only of zeros. Default is off.
.TP
.B \-b | \-bits
Output a binary digit dump instead of hexadecimal. This option is incompatible with \-ps.
.TP
.B \-c cols | \-cols cols
Format the output to include cols octets per line. Default is 16 (12 in C include style, 30 in PostScript).
.TP
.B \-C | \-capitalize
Capitalize variable names in C include file style (\-i).
.TP
.B \-d
Show the offset in decimal instead of hexadecimal.
.TP
.B \-e
Create a little-endian dump. This option is incompatible with \-ps, \-i, and \-r.
.TP
.B \-g bytes | \-groupsize bytes
Group output into octets of bytes size in the normal output mode. Default is 2 (4 for little-endian).
.TP
.B \-E | \-EBCDIC
Display the characters in EBCDIC encoding instead of ASCII.
.TP
.B \-h | \-help | \-\-help
Print a summary of the options.
.TP
.B \-i | \-include
Output in C include file style.
.TP
.B \-l len | \-len len
Stop after len octets.
.TP
.B \-n name | \-name name
Set the variable name used in C include output (\-i).
.TP
.B \-o offset
Add offset to the displayed file position.
.TP
.B \-p | \-ps | \-postscript | \-plain
Output in PostScript plain hexdump style.
.TP
.B \-r | \-revert
Reverse operation: convert (or patch) hexdump into binary.
.TP
.B \-R when
Colorize the output. when can be 'always', 'auto', or 'never'. Default: 'auto'.
.TP
.B \-s [+][-]seek
Start at seek bytes absolute (or relative, with + prefix) in the input file. When used with \-r, the offset is added to file positions found in the hex dump.
.TP
.B \-t
Append a terminating NUL byte to the array in C include file style (\-i).
.TP
.B \-u
Use uppercase letters for hexadecimal output. Default is lowercase.
.TP
.B \-v | \-version
Show version information.
.sp
.SH EXAMPLES
.TP
.B Create a standard hex dump with color:
.nf
tinyxxd file.bin
.fi
.TP
.B Create a little-endian hex dump:
.nf
tinyxxd \-e file.bin
.fi
.TP
.B Output in binary digit format:
.nf
tinyxxd \-b file.bin
.fi
.TP
.B Create a C include file:
.nf
tinyxxd \-i file.bin > file.h
.fi
.TP
.B Reverse a hex dump into binary:
.nf
tinyxxd \-r dump.hex > file.bin
.fi
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.SH EXIT STATUS
.B 0
\- Success.
.B 1-5
\- Various errors (e.g., file I/O errors, invalid arguments).
.sp
.SH ENVIRONMENT VARIABLES
.TP
.B NO_COLOR
If set, disables color output.
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.SH CAVEATS
.TP
.B Little-endian dumps
The \-e option only affects the hexadecimal representation and not the ASCII (or EBCDIC) characters on the right side of the dump. The option is incompatible with \-r, \-p, or \-i.
.TP
.B Reverse Operation (\-r)
The reverse operation may encounter difficulties with lines that are not formatted as expected. It will skip over non-conforming lines and continue processing. Line numbers are used for positioning when writing output, so the order and completeness of lines are important.
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.SH BUGS
No known bugs so far. Issues can be reported at: https://github.com/xyproto/tinyxxd/issues
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.SH AUTHOR
.B tinyxxd
was written by:
.sp
Bram Moolenaar <Bram@vim.org>
.br
Jürgen Weigert <jnweiger@gmail.com>
.br
DungSaga <dungsaga@users.noreply.github.com>
.br
Atsushi SUGAWARA <peanutsjamjam@gmail.com>
.br
Yegappan Lakshmanan <yegappan@yahoo.com>
.br
Erik Auerswald <auerswal@unix-ag.uni-kl.de>
.br
David Gow <david@ingeniumdigital.com>
.br
Philip H <47042125+pheiduck@users.noreply.github.com>
.br
Aapo Rantalainen <aapo.rantalainen@gmail.com>
.br
Christian Brabandt <cb@256bit.org>
.br
Ken Takata <kentkt@csc.jp>
.br
tristhaus <tristhaus@yahoo.de>
.br
OldWorldOrdr <joey.t.reinhart@gmail.com>
.br
Keith Thompson <Keith.S.Thompson@gmail.com>
.br
Igor Todorovski <itodorov@ca.ibm.com>
.br
Kuratius <Kuratius@gmx.net>
.br
Goffredo Baroncelli <kreijack@inwind.it>
.br
Lennard Hofmann <lennard.hofmann@web.de>
.br
RestorerZ <restorer@mail2k.ru>
.br
Husam Harazi <i@vimmer.dev>
.br
Oliver Webb <aquahobbyist@proton.me>
.br
Andre Chang <andre@augmentcode.com>
.br
Randy Eckenrode <randy@largeandhighquality.com>
.br
Alexander F. Rødseth <xyproto@archlinux.org>
.br
Noah Gitsham <me@noahgitsham.com>
.br
Lukáš Jiřiště <kyci@ljiriste.work>
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.SH VERSION
.B tinyxxd 1.3.16
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.SH SEE ALSO
.B xxd(1)
\- Original hex dump utility.