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% ETC1TOOL(1)
% The Android Open Source Project
# NAME
etc1tool - ETC1 conversion tool
# SYNOPSIS
**etc1tool** _infile_ [--help | --encode | --encodeNoHeader | --decode] [--showDifference _difffile_] [-o _outfile_]
# DESCRIPTION
**etc1tool** is a command line utility that lets you encode PNG images to the
ETC1 compression standard and decode ETC1 compressed images back to PNG.
Default is **--encode**
# OPTIONS
_infile_
: The input file to compress.
--help
: Print this usage information.
--encode
: Create an ETC1 file from a PNG file.
--encodeNoHeader
: Create a raw ETC1 data file (without a header) from a PNG file.
--decode
: Create a PNG file from an ETC1 file.
--showDifference _difffile_
: Write difference between original and encoded image to _difffile_. (Only valid
when encoding).
-o _outfile_
: Specify the name of the output file. If _outfile_ is not specified, the output
file is constructed from the input filename with the appropriate suffix
(**.pkm** or **.png**).
# SEE ALSO
https://developer.android.com/tools/help/etc1tool.html
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