Continuing the discussion from Client side image optimization enabled by default : I’m the admin on a self-hosted Discourse instance for local photographers where we mostly upload high quality media. I’d like to change the default image width for the composer to resize down to but I’m not seeing it …

[image] gallery3540: image resize dimensions threshold it is a hidden setting so it can be changed in rails console config/site_settings.yml a77759856 composer_media_optimization_image_resize_dimensions_threshold: default: 1920 hi…

Does the app need to be rebuilt after making this change?

No, but you need to refresh the page.

Is there a way to verify that I’ve configured it properly? Hard refresh (Ctrl+F5) didn’t seem to work, so I rebuilt the app anyway which didn’t make a difference either. Images are still resizing down to 1920px. /var/www/discourse# rails c Loading production environment (Rails 8.0.5) discourse(prod…

i usually do a restart when changing a site setting ./launcher restart app

in rails console again, what value does it return when you enter: SiteSetting.composer_media_optimization_image_resize_dimensions_threshold i just tested this specific change and it updated

[image] Lilly: in rails console again, what value does it return when you enter: SiteSetting.composer_media_optimization_image_resize_dimensions_threshold It returns 1440 This image has an original resolution of 3089x2048, and here’s what it’s resized to after being uploaded just now as a te…

Hmm, no dice. I’ve set both of these values to 1440 and then to be safe did /var/discourse/launcher rebuild app but images are still resizing to 1920. edit: actually after doing a rebuild and then going back to rails, the two variables are back to being undefined. Could something be overwriting th…

That’s not how you check a setting, you need to prepend SiteSetting. to the site setting name.

That did it! Totally getting my resolution ratios wrong though, in my head I was thinking 1440p which is the height, not the width :stuck_out_tongue: Imagine my surprise when the images are now coming out even smaller than before.

Composer image resize threshold

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Falco (Falco) May 1, 2026, 5:00pm 9

composer_media_optimization_image_resize_dimensions_threshold controls when it triggers.

If you want it resized to 1440, you need to set that as composer_media_optimization_image_resize_width_target.

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Composer image resize threshold

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