Pingo is an experimental lossless and lossy image optimizer for PNG, JPEG, WebP and APNG files, designed to transform image data for the Web. It runs from the command line with optimization levels and quality settings. Its license permits free use for exclusive private usage only, and does not permit repackaging, redistributing, downloading, reselling or reusing it through other services, even for non-commercial purposes.
TinyJPG reduces the file size of JPEG images by analyzing each uploaded image and applying an optimal JPEG encoding strategy. Unnecessary metadata is stripped, and the API resizes images with smart cropping. The site states that images are compressed by 40 to 60 percent.
RIOT is a free image optimizer for Windows, macOS and Linux. It offers automatic image optimization, multi-core batch processing and a live original-versus-optimized preview. The project supports JPEG, PNG, WebP and GIF, and its first public release was in 2008.
YOGA Image Optimizer is a free tool to convert and optimize JPEG, PNG and WebP image files. Users drag and drop images and click Optimize. The project states that optimization can be slow and may require a lot of RAM, especially for JPEGs.
pngquant is a command-line utility and library for lossy compression of PNG images. The conversion reduces file sizes significantly and preserves full alpha transparency. Generated images are compatible with all web browsers and operating systems. It offers a fast mode for real-time processing and integrates with shell scripts, GUIs and server-side software.
BIRME is a free online bulk image resizer that runs in the browser. It resizes, crops, renames, watermarks, and converts JPG, PNG, WebP, and AVIF files without uploading them, and can export results as a ZIP.
pinga is an easy to use GUI image optimizer for PNG, JPEG and APNG that transforms image data for the Web. Its license permits exclusive private use at the user's own risk. Repackaging, redistributing, downloading, reselling or reusing pinga through any other service is not permitted, even for non-commercial or non-profit purposes, and this applies to all versions.
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TinyJPG reduces the file size of JPEG images by analyzing each uploaded image and applying an optimal JPEG encoding strategy. Unnecessary metadata is stripped, and the API resizes images with smart cropping. The site states that images are compressed by 40 to 60 percent.
RIOT is a free image optimizer for Windows, macOS and Linux. It offers automatic image optimization, multi-core batch processing and a live original-versus-optimized preview. The project supports JPEG, PNG, WebP and GIF, and its first public release was in 2008.
YOGA Image Optimizer is a free tool to convert and optimize JPEG, PNG and WebP image files. Users drag and drop images and click Optimize. The project states that optimization can be slow and may require a lot of RAM, especially for JPEGs.
pngquant is a command-line utility and library for lossy compression of PNG images. The conversion reduces file sizes significantly and preserves full alpha transparency. Generated images are compatible with all web browsers and operating systems. It offers a fast mode for real-time processing and integrates with shell scripts, GUIs and server-side software.
BIRME is a free online bulk image resizer that runs in the browser. It resizes, crops, renames, watermarks, and converts JPG, PNG, WebP, and AVIF files without uploading them, and can export results as a ZIP.
pinga is an easy to use GUI image optimizer for PNG, JPEG and APNG that transforms image data for the Web. Its license permits exclusive private use at the user's own risk. Repackaging, redistributing, downloading, reselling or reusing pinga through any other service is not permitted, even for non-commercial or non-profit purposes, and this applies to all versions.
