imgproxy

About imgproxy

imgproxy is a self-hosted image-processing server that resizes, crops, converts and optimises images on the fly, removing the need to pre-generate every variant an application might request. Processing options and the output format travel in the image URL, so a new size or format is a URL change rather than a pipeline job and a re-upload. It ships as Docker images and Linux packages and runs on essentially any host, and because it runs on your own infrastructure against your own storage, images never leave your environment and cost is your compute rather than a per-transformation bill — a distinction its published customer stories lean on heavily, one citing a roughly 90% cost reduction after moving off a SaaS processor. Security is handled in the core: real image dimensions are checked so image bombs are cancelled before decoding, URL signing prevents attackers generating arbitrary transformations as a denial-of-service vector, and header-based authorisation stops the caching layer being bypassed. The project is open-core. The open-source edition covers JPEG, PNG, GIF, WebP, AVIF and JPEG XL, resize, crop, rotate, watermark, filters, metadata stripping, PNG quantisation and basic smart cropping. Pro adds video, PDF and PSD preview generation, advanced watermarking and compression, GIF-to-MP4, SVG minification, object detection and SSIM-based auto-quality.

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