You drag an image into the WordPress media library and it fails with a curt “HTTP error.” No detail, no explanation. It’s one of those errors with several possible causes, so let’s rule them out one at a time.
Start simple: retry and rename
Sometimes it’s a temporary hiccup. Reload the page and try again. If a specific file keeps failing, check its filename — special characters, apostrophes and very long names can trip up the uploader. Rename it to something plain like product-photo.jpg and retry.
Check the file size and dimensions
Huge images can exceed your upload limit or exhaust PHP memory mid-processing. If you’re uploading photos straight off a camera or phone, they may be 5000px wide and several megabytes. Resize them to sensible web dimensions first, or raise your upload limit and memory (see our guides on both). A 300KB image is plenty for most web use.
Raise PHP memory and execution time
Image processing is memory-intensive. In wp-config.php add define('WP_MEMORY_LIMIT', '256M'); and, in cPanel’s INI Editor, raise max_execution_time to 300. Underpowered limits are a frequent cause of this error on larger images.
Switch the image editor library
WordPress uses either the Imagick or GD library to process images, and occasionally Imagick misbehaves on shared hosting. Adding a small snippet to your theme’s functions file to prefer GD can resolve stubborn cases. If you’re comfortable, this is a known reliable fix; if not, a plugin can do the same.
Rule out a plugin conflict
Image optimisation and security plugins sometimes interfere with uploads. Temporarily deactivate your plugins and try again. If it works, reactivate them one at a time to find the one at fault.
Check the uploads folder permissions
WordPress needs to write to wp-content/uploads. Confirm that folder is set to 755 in File Manager and is owned correctly. If the folder isn’t writable, uploads fail.
Work down this list and you’ll almost always find the cause — it’s usually memory or a huge file. If uploads still fail after all this, it may be a server limit we need to lift, so open a ticket.
