djxl(1)
=======
:doctype: manpage

Name
----

djxl - decompress JPEG XL images

Synopsis
--------

*djxl* ['options'...] 'input.jxl' ['output']

Description
-----------

`djxl` decompresses a JPEG XL image or animation. The output format is determined
by the extension of the output file, which can be `.png`, `.jpg`, `.ppm`, `.pfm`.
If the JPEG XL input file contains an animation, multiple output files will be
produced, with names of the form "'output'-*framenumber*.ext".


Options
-------

-h::
--help::
    Displays the options that `djxl` supports.

-j::
--pixels_to_jpeg::
    By default, if the input JPEG XL contains a recompressed JPEG file,
    djxl reconstructs the exact original JPEG file if the output file has the
    `.jpg` (or `.jpeg`) filename extension.
    This flag causes the decoder to instead decode the image to pixels and
    encode a new (lossy) JPEG in this case.


-q 'quality'::
--jpeg_quality='quality'::
    When decoding to `.jpg`, use this output quality. This option implicitly
    enables the --pixels_to_jpeg option.


Examples
--------

----
# Decompress a JPEG XL file to PNG
$ djxl input.jxl output.png

# Reconstruct a losslessly-recompressed JPEG file
$ djxl lossless-jpeg.jxl reconstructed.jpeg
----


See also
--------

*cjxl*(1)