How to Fix a 500 Internal Server Error | 2026 Guide

You open your website and see “500 Internal Server Error”. Your visitors can’t see anything, and you don’t know what went wrong.

Don’t worry. This is one of the most common website errors, and in most cases you can fix it yourself. This guide explains what the error means, why it happens, and how to fix it step by step.

What Is a 500 Internal Server Error?

A 500 error is a general message from your web server. It means the server hit a problem while loading your page, but it can’t tell you exactly what the problem is.

Compare it with a 404 error. A 404 clearly says the page is missing. A 500 only says “something went wrong on the server”. That is why it feels confusing.

You may see it in different forms, such as:

• 500 Internal Server Error
• HTTP Error 500
• HTTP 500 – Internal Server Error
• A plain white blank page (common in Firefox and Safari)

Also Read: How to Fix HTTP 451 Unavailable for Legal Reasons

Common Causes of a 500 Error

Most 500 errors come from a few simple problems:

• A broken or badly written .htaccess file
• Wrong file and folder permissions
• PHP memory limit is too low
• Plugin or theme conflicts (very common on WordPress)
• Database connection problems, such as wrong login details
• Corrupted WordPress core files
• Mistakes in code (syntax errors)
• A slow connection to an outside server that times out
• An older PHP version that doesn’t work with your plugins or theme, or the other way round

Before You Start: Check If It’s a Bigger Outage

Sometimes the problem is not on your site at all. When large services like Cloudflare or a big cloud provider have an outage, many websites show 500 errors at the same time.

Check your hosting company’s status page first. If there is a wider outage, don’t change any settings. Most sites come back on their own once the provider fixes the issue.

How to Fix a 500 Internal Server Error

Follow these steps in order.

Step 1: Reload the Page and Clear Your Browser Cache

Wait a minute and refresh the page. Sometimes the server is just busy. You can also:

• Try another browser
• Clear your browser cache
• Use a tool like downforeveryoneorjustme.com to check if the site is down for everyone

This also helps right after you update a plugin or theme, because a short timeout can happen at that moment and goes away quickly.

Also Read: How to Fix a 502 Bad Gateway Error: Step-by-Step Guide

Step 2: Check Your Error Logs

This is the most useful step. Error logs often show the exact file and line that caused the problem.

• In cPanel, go to Metrics → Errors.
• You can also view logs through SFTP or SSH.
• Apache logs are usually at /var/log/apache2/error.log, and Nginx logs at /var/log/nginx/error.log.

For WordPress, you can turn on debug mode. Open wp-config.php and add:

define(‘WP_DEBUG’, true);

define(‘WP_DEBUG_LOG’, true);

define(‘WP_DEBUG_DISPLAY’, false);

Errors will be saved in wp-content/debug.log. Turn debug mode off after you finish testing.

Step 3: Check Your .htaccess File

A single wrong character in this file can break your whole site.

1. Connect to your site using File Manager or SFTP.
2. Rename .htaccess to .htaccess_old.
3. Reload your site.

If the site works, that file was the problem. To create a fresh one in WordPress, go to Settings → Permalinks and click Save Changes. If you can’t log in, create a new .htaccess file with this default code:

# BEGIN WordPress

<IfModule mod_rewrite.c>

RewriteEngine On

RewriteBase /

RewriteRule ^index\.php$ – [L]

RewriteCond %{REQUEST_FILENAME} !-f

RewriteCond %{REQUEST_FILENAME} !-d

RewriteRule . /index.php [L]

</IfModule>

# END WordPress

Step 4: Fix File and Folder Permissions

Wrong permissions can stop the server from running your files. The safe settings are:

• Files: 644
• Folders: 755
• Never use 777 on anything, because it is unsafe and many servers block it.

You can change permissions in cPanel File Manager or with an FTP client.

Step 5: Increase the PHP Memory Limit

If a script needs more memory than your server allows, it stops and causes a 500 error. Try one of these:

• wp-config.php: define(‘WP_MEMORY_LIMIT’, ‘256M’);
• .htaccess: php_value memory_limit 256M
• php.ini: memory_limit = 256M
• cPanel: go to MultiPHP INI Editor and change memory_limit

If it still fails, a particular plugin or script may be using too much memory.

Step 6: Check Your PHP Version

Old plugins may not work on new PHP versions, and new plugins may not work on old ones. In cPanel, open Select PHP Version or MultiPHP Manager and try a different version, such as PHP 8.1 or 8.2. If the error goes away, update your plugins or theme so they match your PHP version.

Also Read: How to Clear DNS Cache on Windows, Mac, Linux, and Browsers

Step 7: Turn Off All Plugins

Plugins are one of the top causes of 500 errors on WordPress.

• If you can open the dashboard: go to Plugins, select all, and choose Deactivate.
• If you can’t log in: connect by SFTP and rename the plugins folder to plugins_old.

If the site comes back, turn the plugins on one by one and reload after each. When the error returns, you have found the bad plugin. Contact its developer or replace it. Deactivating a plugin does not delete your data.

Step 8: Switch to a Default Theme

A broken theme can also cause this error. Switch to a default WordPress theme from Appearance → Themes. If you can’t log in, rename your theme’s folder inside wp-content/themes/. WordPress will switch to a default theme on its own.

Step 9: Reinstall WordPress Core Files

Core files can get damaged by a failed update or a bad upload. Download a fresh copy of WordPress from wordpress.org, remove the wp-content folder from it, and upload the rest to your site. This does not touch your themes, plugins, or media. Take a backup first.

Step 10: Check Your Database Connection

Open wp-config.php and check that these four values are correct:

• DB_NAME
• DB_USER
• DB_PASSWORD
• DB_HOST

Compare them with your hosting panel. You can also try logging in to phpMyAdmin to see if the database is working.

Step 11: Look for Malware

Hacked files can also trigger 500 errors. Warning signs include:

• Strange code in .htaccess
• Unknown PHP files on your server
• Odd redirects or popups

If you suspect malware, restore a clean backup, run a security scan (for example with Wordfence or Monarx), and change all your passwords.

Step 12: Contact Your Hosting Support

If nothing works, contact your host. Some problems are on the server side and only they can fix them. Send them your error log, the changes you made recently, and the steps you already tried. This helps them solve it faster.

Does a 500 Error Hurt SEO?

It can, but only if it stays for a long time. If your site is down for a few minutes, Google usually won’t notice. If it stays down for many hours (around 6 or more), Google may treat it as a serious problem and your rankings can drop. So fix it quickly.

How to Prevent 500 Errors in the Future

• Take regular backups
• Test updates on a staging site before updating the live site
• Update plugins, themes, and WordPress regularly
• Use a modern, supported PHP version
• Keep permissions at 644 for files and 755 for folders
• Remove plugins you don’t use
• Choose well-maintained plugins and themes
• Use a monitoring tool that emails you when your site goes down

Final Words

A 500 Internal Server Error looks scary, but it is usually caused by something simple, such as a bad plugin, a broken .htaccess file, or a low memory limit. Start with your error logs, then work through the steps one by one. Most of the time you will find the cause quickly, and your site will be back online.