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Mozilla JPEG Encoder Project
============================
This project's goal is to reduce the size of JPEG files without reducing quality or compatibility with the vast majority of the world's deployed decoders.
MozJPEG reduces file sizes of JPEG images while retaining quality and compatibility with the vast majority of the world's deployed decoders.
The idea is to reduce transfer times for JPEGs on the Web, thus reducing page load times.
MozJPEG is based on [libjpeg-turbo](https://github.com/libjpeg-turbo/libjpeg-turbo). 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.
'mozjpeg' is not intended to be a general JPEG library replacement. It makes tradeoffs that are intended to benefit Web use cases and focuses solely on improving encoding. It is best used as part of a Web encoding workflow. For a general JPEG library (e.g. your system libjpeg), especially if you care about decoding, we recommend libjpeg-turbo.
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.
More information:
## Features
* [Mailing List](https://lists.mozilla.org/listinfo/dev-mozjpeg)</a>
* [Version 3.0 Announcement](https://boomswaggerboom.wordpress.com/2014/12/30/mozjpeg-3-0-released/)
* Progressive encoding with "jpegrescan" optimization. It can be applied to any JPEG file (with `jpegtran`) to losslessly reduce file size.
* Trellis quantization. When converting other formats to JPEG it maximizes quality/filesize ratio.
* Comes with new quantization table presets, e.g. tuned for high-resolution displays.
* Fully compatible with all web browsers.
* Can be seamlessly integrated into any program using libjpeg.
## Releases
* [Latest release](https://github.com/mozilla/mozjpeg/releases/latest)
* [Version 3.0 Announcement](https://boomswaggerboom.wordpress.com/2014/12/30/mozjpeg-3-0-released/) ([overview of 3.0 features](https://calendar.perfplanet.com/2014/mozjpeg-3-0/))
* [Version 2.0 Announcement](https://blog.mozilla.org/research/2014/07/15/mozilla-advances-jpeg-encoding-with-mozjpeg-2-0/)
* [Version 1.0 Announcement](https://blog.mozilla.org/research/2014/03/05/introducing-the-mozjpeg-project/)