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How to Fix the HTTP Image Upload Error in WordPress

You are uploading an image to WordPress, and suddenly you get an HTTP error. It stops your workflow and leaves you wondering what just happened.

We have run into this issue many times while adding featured images or updating tutorials. It is frustrating because WordPress does not tell you exactly why it happened.

In this guide, we will show you how to fix the HTTP image upload error in WordPress.

fix the HTTP image upload error in WordPress

Quick Summary: The most common fixes for the WordPress HTTP image upload error are:

  1. Increasing your PHP memory limit.
  2. Switching from Imagick to GD Library.
  3. Shrinking your image file size.

What Causes the HTTP Error During Media Upload in WordPress?

The HTTP error in WordPress usually shows up when you are uploading an image through the media library, but it doesn’t say what actually went wrong.

We have seen this happen for several reasons. Here are the most common culprits:

  • Server timeouts
  • Plugin conflicts
  • Low server memory
  • Temporary glitches

In most cases, WordPress attempts to catch the error and shows you a more descriptive error message like this one:

“The server cannot process the image. This can happen if the server is busy or does not have enough resources to complete the task. Uploading a smaller image may help. Suggested maximum size is 2560 pixels.”

New image upload errors

However, in rare cases, instead of telling you what caused it, WordPress just shows a vague ‘HTTP error’ message.

It may look something like this.

Old vague error message

That is what makes it tricky. There is no single fix. You often have to try a few different things to figure out what is blocking the upload.

Below, we will walk you through the most reliable ways to troubleshoot and fix the problem. You can also use the links below to jump to any specific method:

1. Try Uploading the Image Again

Sometimes, the HTTP error is just a temporary hiccup. That is why our first approach is simply to wait a few minutes and then try uploading the image again, like you normally would.

We have seen this happen during brief traffic spikes or when server resources are stretched. Most good hosting providers automatically resolve these issues in the background.

If the error still shows up, here are a few quick things you can try:

  • Refresh your browser or clear your browser cache.
  • Resize and rename the image before uploading it again. You should reduce the pixel dimensions (width and height) rather than just the file size. You can also check out our recommended image compression plugins.
  • Try saving the file in a different format, such as converting a JPEG to PNG, and then re-uploading it.

If none of these help, then the issue likely isn’t temporary, and you will want to move on to the next solution.

2. Deactivate All Plugins and Your Current Theme

If you recently installed a new WordPress plugin, it may be incompatible with your other plugins and disrupt the image upload process. To see if this is the case, you can deactivate all your WordPress plugins.

If the HTTP error disappears after deactivating a WordPress plugin, then that may be the culprit behind the HTTP upload image error. You can install an alternative plugin or contact the developer for support.

For more information, check out our guide on how to easily deactivate all WordPress plugins and how to deactivate plugins when the WordPress dashboard is inaccessible.

Deactivate all WordPress plugins

Similarly, sometimes theme conflicts can also disrupt the image upload process. Themes can include functionalities that might interfere with how WordPress handles media uploads.

Luckily, identifying a theme conflict is relatively straightforward. You can temporarily switch to a default WordPress theme. For more information, check out our guide on how to properly change WordPress themes.

Activating a default WordPress theme

Once the default theme is active, try uploading an image again. If the error disappears, then the issue likely lies with your current theme. In this case, you can check if a theme update is available. Often, updates fix compatibility issues and bugs.

Or you can reach out to the theme developer for support. They might be able to provide a patch or offer guidance on resolving the conflict.

3. Increase PHP Memory Limit

WordPress is written in the PHP programming language. And the amount of memory allocated for different PHP processes is determined by your web hosting server.

If uploading images requires more PHP memory than is available, then you may see the HTTP image upload error in WordPress.

To fix this, you need to increase the memory PHP can use on your server.

Note: Before editing core files, we recommend creating a backup. You can use a plugin like Duplicator to do this easily.

You will first need to access your site’s files using the File Manager app in your web hosting dashboard or using an FTP client. Next, go to your root directory and find the wp-config.php file.

Edit wp-config.php file

You will then need to edit the wp-config.php file using a text editor and add the following line of code just before the line that says ‘That’s all, stop editing! Happy blogging.’

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

This code increases the WordPress memory limit to 256MB, which would be enough to fix any memory limit issues.

Finally, you must save the file and upload it back to the server.

To learn more, please see our step-by-step guide on how to increase the PHP memory limit in WordPress.

4. Change the Image Editor Library From Imagick to GD Library

WordPress runs on PHP, which uses two modules to handle images. These modules are called GD Library and Imagick. WordPress may use either one, depending on which is available.

However, Imagick often runs into memory issues, causing the HTTP error during image uploads. To fix this, you can make the GD Library your default image editor.

You can do this by simply adding this code to your WordPress theme’s functions.php file or using WPCode (recommended):

function wpb_image_editor_default_to_gd( $editors ) {
    $gd_editor = 'WP_Image_Editor_GD';
    $editors = array_diff( $editors, array( $gd_editor ) );
    array_unshift( $editors, $gd_editor );
    return $editors;
}
add_filter( 'wp_image_editors', 'wpb_image_editor_default_to_gd' );

We use WPCode across our own sites to safely add custom code snippets. It prevents errors that can happen when editing theme files manually.

For more details, you can see our guide on how to add custom code in WordPress.

After adding this code, you can retry uploading files using the media uploader. If this doesn’t solve the issue, then you can remove this code and try other methods described in this article.

5. Limit Imagick by Editing .htaccess

This method allows you to control how Imagick uses server resources. Many shared hosting providers limit Imagick’s ability to use multiple threads for faster image processing. However, you will see an HTTP error when uploading images.

Make sure to back up your .htaccess file before making changes.

An easy fix is to add the following code at the very bottom of your .htaccess file:

SetEnv MAGICK_THREAD_LIMIT 1

This code simply limits Imagick to a single thread for image processing.

6. Update Your PHP Version

If your WordPress site is using an outdated version of PHP, then it could trigger the HTTP image upload error. This is because newer PHP versions have performance improvements and generally use less memory.

You can typically find this setting in your web hosting control panel (cPanel) under ‘PHP Manager’ or ‘Select PHP Version’.

Changing the PHP version in SiteGround

Luckily, it’s easy to check your PHP version and update it. For more details, please see our beginner’s guide on how to update your PHP version in WordPress.

7. Check File and Folder Permissions

WordPress relies on specific file and folder permissions to function properly. Incorrect permissions can prevent WordPress from accessing or modifying files, leading to upload errors.

For instance, if the upload directory lacks proper write permissions, WordPress won’t be able to save uploaded images.

File and folder permissions in WordPress

Folders should typically be set to 755, and files should be set to 644.

To ensure correct file permissions, check out our guide on how to fix the file and folder permissions error in WordPress.

8. Enable Debug Mode

Sometimes, underlying PHP errors can cause the HTTP image upload error, making WordPress troubleshooting difficult.

Enabling debug mode in your WordPress configuration will reveal any PHP errors in the debug log, providing valuable clues about the root cause of the upload issue.

You can enable it by adding this code to your wp-config.php file:

define( 'WP_DEBUG', true );

For instructions on enabling WP_DEBUG mode, refer to our article on how to enable WordPress debug mode. This guide provides step-by-step instructions for adding the necessary code to your wp-config.php file.

9. Check Your Hosting Resources

If your website reaches its storage quota or encounters server resource limitations, you might experience upload errors. For example, insufficient disk space can prevent WordPress from creating new files or folders needed for image uploads.

Most web hosting providers offer a control panel where you can view your website’s resource usage, including ‘Disk Usage’ or ‘Inode usage’. If you are unable to see it, contact your hosting provider’s support team for assistance.

If you’re nearing your storage limit, consider optimizing your resources. For example, large image files can consume significant storage. You can optimize your images to reduce their file size before uploading.

If optimizing resources isn’t enough, consider upgrading to a hosting plan with more storage space. This will provide the additional capacity needed for your website’s files.

If you’re looking for a reliable WordPress hosting provider with generous storage space, Bluehost is a popular option. They offer various plans to suit different website needs.

Bluehost homepage

Frequently Asked Questions (FAQs)

1. What causes the HTTP error when uploading images in WordPress?

This error can happen for several reasons, like low PHP memory, plugin conflicts, or temporary server issues. WordPress doesn’t show a specific cause, so you may need to try different solutions to fix it.

2. Is it safe to switch from Imagick to GD Library?

Yes, switching to GD Library is safe. We’ve done this on several sites to fix image upload issues, and WordPress will fall back to Imagick if needed.

3. Will increasing the PHP memory limit affect my site performance?

It won’t harm performance. In fact, increasing the memory limit can help prevent other issues, especially if your site is running multiple plugins or handling large files.

4. What should I do if none of the methods work?

If you’ve tried everything and still see the error, it’s best to reach out to your hosting provider. They can check server logs or permissions and help you fix the root cause.

More Help With WordPress Errors and Images

If you’re still running into trouble or want to prevent other image-related issues, these guides can help.

We’ve used many of these ourselves while troubleshooting similar problems for our sites and clients:

We hope this guide helped you fix the HTTP image upload error in WordPress. It can take a few tries to find the solution that works, but once it’s sorted, you’ll be back to uploading and publishing without interruptions.

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Reader Interactions

175 CommentsLeave a Reply

  1. This problem can be quite frustrating when a website owner can’t upload an image, and no one knows why at that moment. I’ve dealt with this issue about twice, and luckily, I was able to resolve it by adjusting permissions via FTP, which was the core of the problem. However, it’s good to know other methods and possible causes of the issue. I’ll definitely save this tutorial because I have a feeling it won’t be the last time I encounter this problem, and next time, it might not be folder permissions.

  2. FANTASTIC!!! Every other search I did yielded nothing.

    Godaddy hosting with wordpress installed. Killing imagick did the trick. My lightroom plugin is functioning like a trooper now.

    Thank you so much, just had to share with you.

  3. Hi,
    I started having this HTTP uploading error for images that are larger than 600x900px . The size in KB doesn’t matter – 100KB or 300KB – they are uploading just fine if they are less then 600×900.

    I have tried all the methods you described without success.

    Do you think that changing the theme can help?

    • You would first want to reach out to your hosting provider to ensure you are not running into a safety measure from their end that would cause the error.

      Admin

      • Thanks!
        I called them before posting my question – they told me to contact WP support. To me, it also looks like they installed something on their server but are not willing to admit it.
        I’ll call again.

  4. The functions.php method worked for me. I’ve been trying to fix that for months! You saved me a lot of time. Thank you!!!

    • You would likely need to reach out to your hosting provider and they should be able to help solve the issue

      Admin

  5. Tried all the above and no luck. My issue is only mp3 files, I get the http error. Contacted my hosting provider and they could find nothing wrong. Images upload fine. What am I missing?

    • For MP3 files you may need to increase the memory limit to 512 in case it is due to how large the files are

      Admin

  6. Number 3 worked for me! Thank-you so much, that was so frustrating before. You’re site is always so helpful :)

  7. Thank you so much, I went through all four steps but nothing worked. I went back to step 1 and increased it from 256mb to 512mb which solved the problem.

    • Glad our guide could help be a part of the solution and you were able to get it resolved :)

      Admin

  8. Option #3 worked for me to resolve the HTTP error.

    I installed the code snippets plugin and copied the code from here. It worked perfectly the first attempt.

    Thank you!

  9. Also just check the name of your image you want to upload.
    Make it simple as this has done the trick for me on multiple occasions.

    • Have you reached out to your hosting provider to see if there are any errors on their end?

      Admin

  10. None worked above and then we realize our dev site needed to change the Home and Site URL in General Settings in WP Admin from http:// to https:// then it worked! :D

  11. None of these worked in my case. Mod security was the cause. I had to temporarily disable mod security on my web server.

    • Thanks for sharing what worked for you if other users run into this problem. For most users, they will need to reach our to their hosting provider for assistance in editing mod security

      Admin

  12. SOLVED: my pdf files that would not upload into the Word Press media library with HTTP Error had file names with a semi-colon in them. I deleted the semi-colon and it uploaded just fine. Semi-colons are legal characters in Word docs and pdf files, but apparently won’t upload to Word Press for reasons beyond my knowledge. ; ; ; ;

    • If none of these methods worked, have you tried reaching out to your hosting provider to see if they can see an error on their end?

      Admin

  13. Method #4 worked for me. It seems my host was limiting the plugins processing power. Thanks for sharing these solutions.

  14. Another common problem for this is that you used an apostrophe in the file name. I just encountered this problem :)

  15. I have tried all the methods as mentioned above but none of these worked for me. So I contacted the service provider. They resolve the issue.
    They have refreshed and whitelist another IP for me and it works.
    Hope this may help for you too.

    • Have you reached out to your hosting provider to ensure they don’t see any errors on their end?

      Admin

  16. don’t need to follow all step you just need to re-login your website and clear your temp files, that ok

    • For some people maybe, for others, they do require all of the steps in the article. :)

      Admin

  17. I tried Option 3. Now my entire home page is blank. Individual pages are still there. The Sidebar is still visible, but the rest of the home page is blank.

    Please help if possible.

    Thank you,
    Sandy

    • You may want to ensure you didn’t change your homepage settings while troubleshooting and have you removed the code to see if that solved the missing content?

      Admin

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