I have S3 + cloudflare CDN setup. I am wondering if Discourse is using the full rez image or a compress optimize version shown on the forum post.

Discourse compresses images to save space. See: [image] Faster (and smaller) uploads in Discourse with Rust, WebAssembly and MozJPEG | Blog Blog As of a few weeks ago, image uploads in Discourse are faster AND smaller thanks to a technique that compresses and optimizes the images clientside before they are uploaded. This blog post will describe how this feature works and how we implemented it in Discourse. This is a companion discussion topic for the original entry at https://blog.discourse.org/2021/07/faster-user-uploads-on-discourse-with-rust-webassembly-and-mozjpeg/

Does Discourse used optimized versions of uploads?

Product Support

NateDhaliwal (Nate Dhaliwal) January 20, 2026, 11:59pm 2

Discourse compresses images to save space. See:

A way to monitor user-uploaded files 🖼️

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Faster (and smaller) uploads in Discourse with Rust, WebAssembly and MozJPEG \| Blog Blog	35	5849	May 13, 2025
Image compressor Product Support	4	791	August 21, 2020
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Does Discourse used optimized versions of uploads?

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