It’s a beautiful sunny day, you’re up early sitting on your porch admiring the weather and you pull out your laptop excited by the endless possibilities of a productive day to follow.
You open your browser, go over to the search bar, and type in your website URL. Just as you’re taking a sip of your coffee your eyes wander to the screen and you see this
Vibes ruined, day ruined, mood ruined! But it can get way worse! What if you don’t know what the http status code error even means?
We’ve all been there. Trying to get work done only to be stopped in our tracks by an http error code. It's truly a nightmare, especially for a non-technical person who lacks the know-how to decipher the code.
That is exactly why we’ve decided to write this guide for you. We’ll take you through the dark seedy underbelly of the world of http error codes and walk you through what each means and what to do when you run into one.
But first, we need to understand what an http error code is.
What Is the WordPress HTTP Error?
The WordPress HTTP error is not a status code. It appears in the media library when an image upload fails, and the message gives you no reason at all. The usual causes are a low PHP memory limit, an oversized file, the image editor library WordPress picked, or wrong permissions on the uploads folder.
That distinction matters, because the fixes are different. A 500 or a 503 comes from the server and takes the whole page down, which is much closer to a WordPress dashboard that will not load at all. The HTTP error stops one upload while the rest of your dashboard keeps working, so start with the PHP limits and the file itself before you go anywhere near the server.
How to Fix the HTTP Error When Uploading Images
Work down this table in order. The first three rows account for most cases, and each one is a two minute check.
| Cause | What you see | Fix |
|---|---|---|
| Expired login session | Fails after a long editing session, works after a refresh | Reload the page, sign in again, retry the upload |
| PHP memory limit too low | Large images fail, small ones go through | Add define( 'WP_MEMORY_LIMIT', '256M' ); to wp-config.php |
| File is over the upload cap | Fails instantly, always on the same big file | Raise upload_max_filesize and post_max_size, then check Tools > Site Health > Info > Media Handling |
| ImageMagick is failing | Every image fails, whatever the size | Force the GD library with the wp_image_editors filter |
| Uploads folder not writable | Nothing uploads and no month folder is created | Set folders to 755 and files to 644 inside wp-content/uploads |
| Special characters in the filename | One file fails, the rest are fine | Rename it using letters, numbers, hyphens and underscores only |
| Plugin or theme conflict | Started right after an update | Deactivate plugins one at a time, then switch to a default theme to confirm |
To force the GD library, drop this into your theme's functions.php or a site specific plugin. It tells WordPress to try GD before ImageMagick, which clears the error on hosts where the ImageMagick module is old or partly compiled.
add_filter( 'wp_image_editors', function( $editors ) {
return array( 'WP_Image_Editor_GD', 'WP_Image_Editor_Imagick' );
} );If none of that helps, stop guessing and read the log. Add define( 'WP_DEBUG', true ); and define( 'WP_DEBUG_LOG', true ); to wp-config.php, retry the upload, then open wp-content/debug.log. The real error is almost always named there in a single line, and it usually points at memory or at the image editor. When memory is the culprit it rarely stops at uploads, so check whether you also have a slow WordPress admin to go with it.
A cluttered library makes all of this harder to spot, because every failed retry can leave an orphan file behind. It is worth cleaning up your WordPress media library once the uploads work again, and if you are running thousands of files, our guide to managing a large media library covers the load side of the problem. WP Adminify media folders keep new uploads sorted as they arrive, so a gap is obvious the day it appears.
What is an HTTP Status Code Error?
HTTP status codes are messages from web servers to your browser. They help explain what happened when you try to visit a webpage. These are important! Why? Because it simply shows what's wrong with your site.
Here’s how it works:
- Requesting a Page: Suppose, you typed a web address or clicked a link. Now the browser asks it's (the URLs) server for information for the given URL/Link.
- Server Processes the Request: Once the server get the request and search information for the page.
- Server Sends a Response: Then the server processes and approves the information and sends a response with status codes.
There are five (5) types of status codes. Which are following:
- 1xx Informational: The server request was received and current processing.
- 2xx Success: The request was successful, and the server has sent the page or file you wanted. The request is successfully processed. And it sent you required information.
- 3xx Redirection: The page you're looking for is moved, so you need to move on to a new page.
- 4xx Client Error: There is a problem with your request. Either the page is missing or you don't have access to the page.
- 5xx Server Error: This is a server-sided issue. The server failed to process the request you gave.
Status codes gives you information on why a page isn’t loading. It indicates what might be wrong and how to fix it.
If you don't, well do not worry! Because this article is for you. And I'll try my level best to inform you all the things you should know in a very simple way.
However, you might think what these error codes are actually referring to. As, mostly the terms are quite specific. Although developers and web designers easily understands it, a basic user might not.
So, before I share details about the status codes, I've listed the frequently used terms for you.
Terminology List
HTTP
This is the system that lets your browser talk to websites. It moves data between your device and the server.
Status Code
A 3-digit number that shows what happened when you tried to load a page. It tells you if things went right or wrong.
URI (Uniform Resource Identifier)
This is a web address that points to something online. URLs (like the ones you type in the browser) are one type of URI.
Server
A powerful computer that stores websites. It sends pages, images, and data to you when you ask for them.
Client
That’s your device or browser. It asks the server for stuff like pages or files.
Browser
An app you use to visit websites. For example: Chrome, Brave, Firefox, Safari, and Edge.
Redirect
A web page automatically sends you to another page. This happens when a link has changed to a new directory. A misconfigured redirect can also trap you in a WordPress login redirect loop, where the login screen keeps reloading instead of opening the dashboard.
Cache
It is the temporary storage for browsers. It helps to load websites faster the next time you visit.
Permissions
Rules that decide who can view, change, or use files on a site or server.
Logs
Records of what happened on a server. They help you find and fix problems.
Plugin
An extra tool you add to your WordPress site to add new features or functions.
Theme
The design and layout of your WordPress site. It controls how your site looks.
Host / Hosting Provider
A service that stores your website and makes it available online. They keep your site running and accessible to visitors.
Common WordPress HTTP Status Code Errors
Informational Responses (1xx)
1xx status codes are messages from the server that tell you the request has been received and is being processed. These are not final responses, but rather updates that the server is working on your request.
1xx codes are generally not common in everyday browsing. They are more like behind-the-scenes updates to let the browser know the server is handling things.
Successful Responses (2xx)
2xx codes mean your request worked properly. The server received your request, and processed it. Meaning the server responded just as expected.
Redirection Messages (3xx)
3xx codes mean your browser needs switch to finish the request. Usually, this happens when a page/URL moved to a new location.
Client Error Responses (4xx)
4xx codes mean there was a problem with the request. Maybe you typed the wrong URL. Or, you tried to access a restricted page.
Server Error Responses (5xx)
5xx codes mean the server ran into an error and couldn’t finish the request. This indicates a server-sided error.
Some Common WordPress Error Codes
If you manage a WordPress site, you’ve probably come across a few error codes. These HTTP status codes can be confusing. But they actually give you helpful insights about what’s going wrong.
Here are some of the most common error codes WordPress users get.
403 Forbidden Error
403 error occurs when you're blocked from accessing the page. It happens because of incorrect file permissions.
How to fix it: You need to tweak your .htaccess file. Temporarily disable all the security plugins to fix it. Or seek assistance from the hosting provider.
404 Not Found Error
The most common error is 404 not found. This means your permalink settings are broken or your .htaccess file is corrupted.
How to fix it: Resetting permalinks regenerating the .htaccess file will fix 404 errors
400 Bad Request Error
400 bad request usually happens during AJAX requests. Plugin conflicts, theme issues, or bad server settings are the main cause of it.
How to fix it: Try disabling plugins one by one. If the issue still persists, switch to a default theme. Sometimes increasing the PHP memory limit would do the trick.
415 Unsupported Media Type
415 error means uploading a wrong media file. When you upload a he file type that isn't allowed or your server doesn’t recognize, 415 appears.
How to fix it: Check if the server's MIME types are properly configured. And upload only the supported formats.
500 Internal Server Error
500 status code means its an internal server error. Plugin conflicts, corrupted WordPress files, or low PHP memory are the main reason for this.
How to fix it: Increase your PHP memory limit, disable all plugins, or reinstall core WordPress files.
503 Service Unavailable
When the server is down for maintenance or overloaded, 503 error appears. A server hungry plugin might cause this issue.
How to fix it: Generally it fixes automatically within few minutes. But if the issue still appears, contact your hosting provider.
Final Thoughts
Running a WordPress site? Then you must know about HTTP status codes.
These codes tell you the details when a page doesn’t load. Sometime you might be at fault and in other cases it might be the server.
You can detect issues faster if you know the status codes. You’ll know what went wrong and how to fix.
Do read this guide top to bottom. It will help you understand and solve problems quickly.
WordPress HTTP Error FAQs
How do I fix an HTTP error in WordPress?
Retry the upload first, because a dropped login session causes a surprising number of them. If it fails again, raise the PHP memory limit to 256M, confirm the file is under your upload cap, rename it without special characters, and check that wp-content/uploads is writable. Force the GD image library if every image fails.
How to fix HTTP error 500 in WordPress?
A 500 is a server error, not an upload error, so treat it separately. Rename .htaccess to .htaccess-old and reload the site. If it returns, resave your permalinks to rebuild the file. If it does not, deactivate all plugins, switch to a default theme, and raise the PHP memory limit, testing after each step.
How do I increase the WordPress memory limit?
Add define( 'WP_MEMORY_LIMIT', '256M' ); to wp-config.php, above the line that tells you to stop editing. Some hosts cap memory at the server level, so open Tools > Site Health > Info > Server afterwards and confirm the new value took effect. If it did not, ask your host to raise the PHP memory limit.
How do I enable WP_DEBUG in WordPress?
Open wp-config.php and set define( 'WP_DEBUG', true ); and define( 'WP_DEBUG_LOG', true );. Add define( 'WP_DEBUG_DISPLAY', false ); so visitors never see the errors. WordPress then writes everything to wp-content/debug.log. Switch all three back off once you have found the cause.
What causes the WordPress white screen of death?
A fatal PHP error with error display switched off. The usual triggers are a plugin or theme that is incompatible with your PHP version, a memory limit that runs out mid request, or a syntax error in a file you just edited. Enable WP_DEBUG_LOG and the log will name the file that threw it.
What is causing a 500 error when logging into WordPress?
A login that returns 500 usually points at a corrupted .htaccess file, a security or login plugin that is failing, or a memory limit that runs out while the dashboard loads. Rename .htaccess, then rename the plugins folder over FTP to disable everything at once, and try signing in again.
