How to Fix an "HTTP Error" When Uploading Images in WordPress

An HTTP error that appears when you try to upload a photo to the WordPress Media Library almost never means your internet connection failed. It usually means the server couldn't finish processing the image, most often because of a memory limit, a timeout, or a conflict with a plugin or theme. The fix depends on which of those is the cause, so work through the checks below in order.

Common Causes

• The image file is large and WordPress runs out of memory while creating thumbnail sizes.
• The server hits a timeout before processing finishes, often on shared hosting during busy periods.
• A plugin (especially image optimization, security, or page builder plugins) is interfering with the upload process.
• The PHP image library WordPress uses to resize photos (GD or Imagick) is misconfigured or missing a required extension.

Quick Fixes to Try First

1. Refresh the page and try uploading the same image again. Some HTTP errors are one-off timeouts and succeed on a second attempt.
2. Try uploading a much smaller test image (under 500KB). If the small image uploads fine, the original file's size or dimensions are the problem, so resize or compress it before uploading again.
3. Try uploading from a different browser or in an incognito/private window, in case a browser extension is interfering with the upload request.

Increase Your Site's Memory and Upload Limits

If large images consistently fail, WordPress may be running out of memory. Add this line to your wp-config.php file, just above the line that says /* That's all, stop editing! */:

define('WP_MEMORY_LIMIT', '256M');

If that doesn't help, the limit may need to be raised at the server level rather than inside WordPress. See How to Increase PHP Upload and Memory Limits for Your Website for the control panel steps.

Rule Out a Plugin or Theme Conflict

1. Go to Plugins in your WordPress dashboard and deactivate all plugins except WordPress's own defaults.
2. Try uploading the image again. If it now works, reactivate your plugins one at a time, testing an upload after each, until you find the one causing the error.
3. If the error disappears with a default theme active (try switching to a theme like Twenty Twenty-Four), your theme may be the cause instead.

Deactivating a plugin does not delete its data or settings, so it's safe to test this way and reactivate afterward.

Switch the PHP Image Processing Library

WordPress uses either the GD or Imagick PHP extension to resize and process uploaded images. If one is missing, outdated, or misconfigured on your hosting account, uploads can fail with an HTTP error even when the file itself is fine. A plugin such as one that lets you choose the image editor engine can switch WordPress from Imagick to GD (or back), which resolves the issue in many cases. If you're not sure which extensions are active on your account, your hosting provider's support team can confirm this for you.

Still Not Working?

Check your site's disk space and file permissions next: an account that's full, or an uploads folder with incorrect permissions, can also produce an HTTP error on upload rather than a clearer "disk full" message. If none of the above resolves it, the image file itself may be corrupted; try opening it in an image editor and re-saving it as a fresh JPEG or PNG before uploading again.