oxipng

all

Losslessly improve compression of PNG files.

Options (4)

-o, --optboolean

Compress a file with a set optimization level (default is 2)

Example: oxipng {{[-o|--opt]}} {{0|1|2|3|4|5|6|max}} {{path/to/file.png}}

-i, --interlaceboolean

Set the PNG interlacing type (`off` removes interlacing, `on` applies Adam7 interlacing, `keep` preserves existing interlacing; default is `off`)

Example: oxipng {{[-i|--interlace]}} {{off|on|keep}} {{path/to/file.png}}

-a, --alphaboolean

Perform additional optimization on images with an alpha channel

Example: oxipng {{[-a|--alpha]}} {{path/to/file.png}}

-z, --zopfliboolean

Use the much slower but stronger Zopfli compressor with max optimization

Example: oxipng {{[-z|--zopfli]}} {{[-o|--opt]}} max {{path/to/file.png}}

Compress a PNG file (overwrites the file by default)

oxipng path/to/file.png

Compress a PNG file and save the output to a new file

oxipng --out path/to/output.png path/to/file.png

Compress all PNG files in the current directory using multiple threads

oxipng "*.png"

Compress a file with a set optimization level (default is 2)

oxipng [-o|--opt] 0|1|2|3|4|5|6|max path/to/file.png

Set the PNG interlacing type (`off` removes interlacing, `on` applies Adam7 interlacing, `keep` preserves existing interlacing; default is `off`)

oxipng [-i|--interlace] off|on|keep path/to/file.png

Perform additional optimization on images with an alpha channel

oxipng [-a|--alpha] path/to/file.png

Use the much slower but stronger Zopfli compressor with max optimization

oxipng [-z|--zopfli] [-o|--opt] max path/to/file.png

Strip all non-critical metadata chunks

oxipng --strip all path/to/file.png