# Resizing images after upload settings **URL:** \ **Category:** Self-hosting\ **Created:** [October 27, 2017, 1:58am UTC](https://meta.discourse.org/t/resizing-images-after-upload-settings/72889 "2017-10-27T01:58:41Z")\ **Posts on this page:** 1\ **Showing post:** 14
**Author:** ![zogstrip](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/zogstrip/32/512781_2.png) [@zogstrip](https://meta.discourse.org/u/zogstrip)\ **Post date:** [October 27, 2017, 10:13am UTC](https://meta.discourse.org/t/resizing-images-after-upload-settings/72889/14 "2017-10-27T10:13:15Z")
> [@schungx](#): > > It has been said that Discourse will scale down very large images in the background; how large is very large, and how much to scale down has always remained a mystery. It’s not a mystery if it’s written in [plain text](https://github.com/discourse/discourse/blob/master/lib/upload_creator.rb) 😉 Ok, so here’s what happens when a user uploads an image - NGINX accepts the image up to its “`client_max_body_size`” setting (defaults to 10MB, can be overwritten in `app.yml`) - Then, we’ll convert [large](https://github.com/discourse/discourse/blob/90d6677d97626346ea8e0c6321f19ebda6aeb918/lib/upload_creator.rb#L124) PNG/BMPs to JPEG to keep the filesize at bay - Then, we’ll halve (up to 3 times) the uploaded image until it’s lower than the “`max image size kb`” site setting - If the image is still larger, then we’ll reject it 💥 - Then, go on with the upload process (fix orientation, crop, optimize…) --- _[View the full topic](https://meta.discourse.org/t/resizing-images-after-upload-settings/72889)._