Error Code Portal
CloudflareCloudflare HTTP errorsError code

503

Error 503: service temporarily unavailable

Alternative forms: Error 503

What does this code mean?

Code 503 · An issue reported by Cloudflare HTTP errors.

Official explanation · Original text

HTTP error 503 occurs when your origin web server is overloaded. There are different causes identifiable by the error message or the location of the error:

Troubleshooting and diagnostic links

First check that the document's product, version, and environment match your situation.

Source and terms of use

Error 503: service temporarily unavailable ↗

Creator: Cloudflare, Inc. and contributors
License: Creative Commons Attribution 4.0 International
Checked on: 2026-11-12

Modifications: Selected introductory official description; Markdown stripped; original Korean product context added. Direct official error page retains the complete cause and resolution instructions.

Source details · Original licenses and notices