HTTP status code 503 (Service Unavailable) means: The server is temporarily unable to handle the request because it is overloaded or under maintenance. Yes, a server error: the website failed to handle the request. Usually only the site owner or host can fix it.
Is it an error?
Yes, a server error: the website failed to handle the request. Usually only the site owner or host can fix it.
Common causes
- Server overloaded, out of resources or under maintenance
- Backend server crashed or sent an invalid response
If you are visiting the site
- Wait a few minutes before trying again
- Reload the page
If you run the website
- Add server resources or caching and check for traffic spikes
- For planned maintenance, return 503 with a Retry-After header
- Check the server error logs at the time of the error
Frequently asked questions
What does HTTP 503 mean?
HTTP status code 503 (Service Unavailable) means: The server is temporarily unable to handle the request because it is overloaded or under maintenance.
Is HTTP 503 an error?
Yes, a server error: the website failed to handle the request. Usually only the site owner or host can fix it.
How do I fix a 503 error?
If you are visiting the site: Wait a few minutes before trying again; Reload the page. If you run the website: Add server resources or caching and check for traffic spikes; For planned maintenance, return 503 with a Retry-After header; Check the server error logs at the time of the error.