Pngcrush is a free and open source optimizer for PNG (Portable Network Graphics) files. It is a command-line tool.
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Category: CLI
zopflipng – PNG optimisation tool using zopfli
Zopfli Compression Algorithm is a compression library programmed in C to perform very good, but slow, deflate or zlib compression.
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OptiPNG – advanced PNG optimizer
OptiPNG optimizes PNG files, i.e. reduce their size to a minimum, without losing semantic information.
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pngquant – command-line utility and a library for lossy compression of PNG images
pngquant is a command-line utility and a library for lossy compression of PNG images.
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Lepton – image compression tool and file format
Lepton is a tool and file format for losslessly compressing JPEGs by an average of 22%.
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MozJPEG – Mozilla JPEG Encoder Project
MozJPEG improves JPEG compression efficiency achieving higher visual quality and smaller file sizes at the same time.
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Guetzli – perceptual JPEG encoder
Guetzli is a JPEG encoder that aims for excellent compression density at high visual quality.
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hyx – minimalistic hex editor
hyx is a minimalistic but powerful hex editor. It’s written in less than 2,300 lines of C.
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hexyl – colored command-line hex viewer
hexyl is a simple hex viewer for the terminal with colored output.
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ImHex – hex editor
ImHex is a hex editor. It can display, decode and analyze binary data to reverse engineer their format, extract information or patch values. There’s also a CLI.
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