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[SOLVED] Post-processing of the image failed. If this is a photo or a large image, please scale it down to 2500 pixels and upload it again.

Post-processing of the image failed. If this is a photo or a large image, please scale it down to 2500 pixels and upload it again.

UPDATED: June 21st, 2021

Nothing is worse than a website error. Worse and annoying.. Today, while I tried to manage a WordPress site of a client, I found a WordPress 5.3 Upload error. “Ok”, said to myself, “let’s found the problem and fix it.” . First thing I did was to look at the image properties, to see what is the real size of it. The size of the image were about 1900×320 ( far lower than the recommendation from the inside of the error ).

 

Hmm… Strange. Usually I don’t have this kind of problem, even if I upload big-size images (which is very rare, but anyway). Maybe we’ll discuss more regarding the image optimization process, and how important is this for your business website.

So, discovering this WordPress image post-processing issue, I started to research about it, and to find a quick solve. And I found not one but two quick ways to solve this error and get everything works again.


First thing I did was to take a look on  WordPress Support forum. The users from there usually found quickly these kind of errors and also come with solutions. But this time I was unlucky. Well, next step was to search on Reddit and I found a temporary solution for this problem, until WordPress will solve the issue:

Post-processing of the image failed. If this is a photo or a large image, please scale it down to 2500 pixels and upload it again.

To temporary solve it, you have two options:

1. Add this line to the functions.php of your theme ( or of your child theme ):

add_filter( 'big_image_size_threshold', '__return_false' );

Pay attention to the actions you make, because you can crash the entire website!

2. ( Safer ) Install the “Disable “BIG Image” Threshold” plugin, provided by Jonathan Desrosiers ( Many thanks to you, Jonathan ). You can search the plugin in your Admin Dashboard area -> Plugins, or download it from here: https://wordpress.org/plugins/disable-big-image-threshold/

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