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30 lines
2.1 KiB
Markdown
30 lines
2.1 KiB
Markdown
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Mozilla JPEG Encoder Project [](https://ci.appveyor.com/project/kornel/mozjpeg-4ekrx)
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============================
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MozJPEG reduces file sizes of JPEG images while retaining quality and compatibility with the vast majority of the world's deployed decoders.
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MozJPEG is based on [libjpeg-turbo](https://github.com/libjpeg-turbo/libjpeg-turbo). **Please send pull requests to libjpeg-turbo** if the changes aren't specific to newly-added MozJPEG-only compression code. This project aims to keep differences with libjpeg-turbo minimal, so whenever possible, improvements and bug fixes should go there first.
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It's compatible with libjpeg API and ABI, and can be used as a drop-in replacement for libjpeg. MozJPEG makes tradeoffs that are intended to benefit Web use cases and focuses solely on improving encoding, so it's best used as part of a Web encoding workflow.
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MozJPEG is meant to be used as a library in graphics programs and image processing tools. We include a demo `cjpeg` tool, but it's not intended for serious use. We encourage authors of graphics programs to use MozJPEG's [C API](libjpeg.txt) instead.
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## Features
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* Progressive encoding with "jpegrescan" optimization. It can be applied to any JPEG file (with `jpegtran`) to losslessly reduce file size.
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* Trellis quantization. When converting other formats to JPEG it maximizes quality/filesize ratio.
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* Comes with new quantization table presets, e.g. tuned for high-resolution displays.
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* Fully compatible with all web browsers.
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* Can be seamlessly integrated into any program using libjpeg.
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## Releases
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* [Latest release](https://github.com/mozilla/mozjpeg/releases/latest)
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* [Overview of 3.0 features](https://calendar.perfplanet.com/2014/mozjpeg-3-0/)
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* [Version 2.0 Announcement](https://blog.mozilla.org/research/2014/07/15/mozilla-advances-jpeg-encoding-with-mozjpeg-2-0/)
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* [Version 1.0 Announcement](https://blog.mozilla.org/research/2014/03/05/introducing-the-mozjpeg-project/)
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## Compiling
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See [BUILDING](BUILDING.md).
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