HTTP 500 Internal Server Error: Causes and How to Fix It

An HTTP 500 Internal Server Error means something went wrong on the server, but the server cannot specify what. It is the most generic server error, a catch-all when no more specific 5xx code applies. The actual cause is in the server’s error logs, visible only to the administrator.

This is one of the most common and frustrating web errors because it gives no details. As a visitor, you can try client-side fixes. As a site owner, you need to check server logs.

Fix as a Visitor

Hard refresh with Ctrl+F5. Clear browser cache and cookies. Try Incognito mode. Try a different browser. If it fails everywhere, the problem is 100% server-side and you must wait for the administrator to fix it.

Fix as a Site Owner

Check server error logs (Apache: /var/log/apache2/error.log, Nginx: /var/log/nginx/error.log). For WordPress: enable WP_DEBUG in wp-config.php, rename .htaccess and regenerate, increase PHP memory (define WP_MEMORY_LIMIT 256M), deactivate plugins via FTP, switch to default theme. Fix the specific error shown in logs.

Frequently Asked Questions

Does a 500 error mean the site is hacked?

Rarely. Most 500s come from configuration errors, broken updates, or resource exhaustion. Malware can cause PHP errors that result in 500, but it is not the typical cause.

How long does a 500 error last?

Depends on the cause. A momentary glitch resolves in seconds. A broken plugin update persists until fixed. Check server logs for the specific cause and fix accordingly.

Can I fix a 500 error on someone else’s site?

As a visitor, only client-side fixes (cache clear, different browser). The actual fix requires server access that only the site administrator has. Report the issue if you can find their contact info.