DOKK / manpages / debian 12 / guetzli / guetzli.1.en

guetzli - perceptual JPEG encoder

guetzli [flags] input_filename output_filename

Guetzli is a JPEG encoder that aims for excellent compression density at high visual quality. Guetzli-generated images are typically 20-30% smaller than images of equivalent quality generated by libjpeg. Guetzli generates only sequential (nonprogressive) JPEGs due to faster decompression speeds they offer.


Print a verbose trace of all attempts to standard output.

--quality Q

Visual quality to aim for, expressed as a JPEG quality value.

--memlimit M

Memory limit in MB. Guetzli will fail if unable to stay under the limit. Default is 6000 MB


Do not limit memory usage.

This manual page was written by ChangZhuo Chen <> for the Debian GNU/Linux system (but may be used by others).