HTTP 303 See Other vs 530 Site Frozen
HTTP 303 (See Other) is a 3xx Redirection response, while 530 (Site Frozen) is a 5xx Server Error response. 303 indicates that the server is redirecting to a different resource using GET, typically after a POST operation (Post/Redirect/Get pattern). In contrast, 530 means that cloudflare-specific. Used by Pantheon hosting to indicate a frozen site.
Description
The server is redirecting to a different resource using GET, typically after a POST operation (Post/Redirect/Get pattern).
When You See It
After form submissions to prevent resubmission on browser refresh.
How to Fix
Follow the Location header with a GET request. This is intentional — part of the PRG pattern.
Description
Cloudflare-specific. Used by Pantheon hosting to indicate a frozen site.
When You See It
When a site on Pantheon hosting has been frozen due to inactivity.
How to Fix
Reactivate the site on the hosting platform.
Key Differences
303 is a 3xx Redirection response, while 530 is a 5xx Server Error response.
HTTP 303: The server is redirecting to a different resource using GET, typically after a POST operation (Post/Redirect/Get pattern).
HTTP 530: Cloudflare-specific. Used by Pantheon hosting to indicate a frozen site.
You encounter 303 when after form submissions to prevent resubmission on browser refresh.
You encounter 530 when when a site on Pantheon hosting has been frozen due to inactivity.
When to Use Which
For 303 (See Other): Follow the Location header with a GET request. This is intentional — part of the PRG pattern. For 530 (Site Frozen): Reactivate the site on the hosting platform.