zappem.net/pub/debug/xxd

xxd - a Go package for generating hex dumps

Overview

Under Linux there is a handy stand alone command xxd that can be used to generate HEX dumps of binary data files. This package reproduces one of its output formats: the output of xxd -g1.

With data := []bytes{0x00, 0xf0, 0x07, ... 0x5b, 0x00, 0x20}, of 64 bytes total length, for example, xxd.Print(0, data) will generate the following output:

00000000: 00 f0 07 20 c5 63 00 20 8f 31 00 20 79 31 00 20  ... .c. .1. y1. 
00000010: 95 31 00 20 9b 31 00 20 a1 31 00 20 00 00 00 00  .1. .1. .1. ....
00000020: 00 00 00 00 00 00 00 00 00 00 00 00 31 3a 00 20  ............1:. 
00000030: a7 31 00 20 00 00 00 00 f1 3a 00 20 11 5b 00 20  .1. .....:. .[. 

Each line is aligned to a multiple of 16 bytes, but data is output starting at the offset indicated by the first argument. As such, xxd.Print(5, data) will generate:

00000000:                00 f0 07 20 c5 63 00 20 8f 31 00       ... .c. .1.
00000010: 20 79 31 00 20 95 31 00 20 9b 31 00 20 a1 31 00   y1. .1. .1. .1.
00000020: 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ...............
00000030: 00 31 3a 00 20 a7 31 00 20 00 00 00 00 f1 3a 00  .1:. .1. .....:.
00000040: 20 11 5b 00 20                                    .[. 

Automated documentation for this Go package is available from .

License info

The xxd package is distributed with the same BSD 3-clause license as that used by golang itself.

Reporting bugs and feature requests

The xxd package was developed purely out of self-interest to help debug other programs and packages. Should you find a bug or want to suggest a feature addition, please use the bug tracker.