Skip to content

Most visited

Recently visited



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.

The usage for etc1tool is:

etc1tool infile [--help | --encode | --encodeNoHeader | --decode] [--showDifference
diff-file] [-o outfile]
Option Description
infile The input file to compress
--help Print usage information
--encode Create an ETC1 file from a PNG file. This is the default mode for the tool if nothing is specified.
--encodeNoHeader Create a raw ETC1 data file (without a header) from a PNG file.
--decode Create a PNG file from an ETC1 file
--showDifference diff-file Write the difference between the original and encoded image to diff-file (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).
This site uses cookies to store your preferences for site-specific language and display options.

Get the latest Android developer news and tips that will help you find success on Google Play.

* Required Fields


Follow Google Developers on WeChat

Browse this site in ?

You requested a page in , but your language preference for this site is .

Would you like to change your language preference and browse this site in ? If you want to change your language preference later, use the language menu at the bottom of each page.

This class requires API level or higher

This doc is hidden because your selected API level for the documentation is . You can change the documentation API level with the selector above the left navigation.

For more information about specifying the API level your app requires, read Supporting Different Platform Versions.

Take a short survey?
Help us improve the Android developer experience. (April 2018 — Developer Survey)