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imgproxy documentation skip to main content imgproxy net community discord x twitter bluesky mastodon threads linkedin 4 0 x latest 4 0 x 3 31 x 3 30 x 3 29 x 3 28 x 3 27 x 3 26 x 3 25 x 3 24 x 3 23 x 3 22 x 3 21 x 3 20 x 3 19 x search getting started imgproxy pro installation configuration usage features image sources cache monitoring image formats support about the processing pipeline health check memory usage tweaks version 4 0 x on this page imgproxy is a fast and secure standalone server for resizing processing and converting images the guiding principles behind imgproxy are speed security and simplicity imgproxy is able to quickly and easily resize process and optimize images on the fly and it s well equipped to handle a large amount of image processing imgproxy is a drop in replacement for all the image processing code inside your web application such as using image processing libraries or calling command line tools with imgproxy you don t need to repeatedly re prepare images to fit your design every time it changes as imgproxy does this on demand to get an even better introduction and to dive deeper into the nitty gritty details check out this article by evil martians imgproxy resize your images instantly and securely features imgproxy is packed with features to the brim to cover all your image processing needs feature imgproxy oss imgproxy pro image formats basic formats jpeg png gif webp avif jpeg xl and more preview generation for video pdf and photoshop documents processing resizing cropping rotating watermarking filters getting image info advanced watermarking color adjustment optimization color profile and metadata stripping png quantization advanced compression settings gif to mp4 conversion svg minification smart features simple smart cropping auto quality by file size object detection advanced smart cropping auto quality by ssim best format selection check out the full feature list for more details how it works imgproxy works as a standalone http server you provide it with a source image url and a set of processing options via a specially crafted url and imgproxy fetches the image processes it according to your specifications and serves the resulting image back to you you can use imgproxy urls directly in your html css or javascript code just like you would with any other image url this way imgproxy offloads all the image processing work from your application the only thing your application needs to do is to generate imgproxy urls with the desired processing options main principles simplicity keep it simple stupid we believe that software should be simple yet powerful if your grandma can t get it up and running you should make it simpler that s why we designed imgproxy to be ready to use in a couple of minutes with minimal configuration check out the getting started guide to see how easy it is no code is better than no code we believe in the single responsibility principle if something can be done better outside of imgproxy we won t reinvent the wheel as a couple of examples https support sounds like a must have feature for a web server however imgproxy will live behind a cdn a load balancer or a reverse proxy in a production environment anyway so there is no need to implement https support inside imgproxy itself rounding image corners or applying masks sounds useful but doing this with css is way easier and more flexible speed we strive to tune every little piece of imgproxy to make it as fast as possible imgproxy takes advantage of probably the most efficient image processing library out there libvips it s scary fast and comes with a very low memory footprint our extensive experience with libvips has enabled us to optimize our image processing pipeline to its maximum you can take a look at some benchmarking results and compare imgproxy with some well known alternatives in our benchmark report security image processing is a wide attack surface that s why we treat security very seriously imgproxy offers several security measures that enable you to strike the optimal balance between security and usability for your specific use case for example imgproxy supports signing image urls to prevent abusing your image processing server for denial of service attacks or simply using it for the attacker s own needs imgproxy checks the image type before fully downloading it to prevent unwanted resource consumption imgproxy checks the real image dimensions before decoding it to prevent so called image bombs like those described in this doc imgproxy supports authorization by http header to prevent direct access to it bypassing your cdn or caching server imgproxy allows restricting image sources maximum image file size processing options etc check out our documentation for more details on security features supporting imgproxy imgproxy is not a side project it s what we do for a living we work hard to make it better every day if you find imgproxy useful and want to support its development here are some ways you can do that imgproxy pro subscription imgproxy pro is a more feature rich version of imgproxy by subscribing to imgproxy pro you not only support the development of imgproxy but also get access to advanced features and priority support sponsorship if you don t need the pro features but still want to support the project consider sponsoring us on github sponsors spread the word if you like imgproxy give it a shoutout we don t spend much on marketing and imgproxy s popularity is primarily a result of our valued users sharing it on social media and blogs special thanks many thanks to evil martians for providing a steady launch pad for imgproxy roman shamin for the awesome logo and website design john cupitt and kleis auke wolthuizen for developing libvips and for helping me optimize its usage with imgproxy kirill kuznetsov for the helm chart license imgproxy is licensed under the mit license see license for the full license text security contact to report a security vulnerability please contact us at security imgproxy net we will coordinate the fix and disclosure edit this page features how it works main principles simplicity speed security supporting imgproxy special thanks license security contact project github docker sponsor imgproxy community x twitter discord bluesky mastodon threads linkedin more imgproxy net blog legal privacy policy cookie policy your privacy choices notice at collection copyright 2026 foxes with matches inc built with docusaurus