HTTP 303 See Other

HTTP 303 See Other indicates a redirection response outcome.

What it means

See Other describes how the server processed the request and what the client should do next.

Why it happens

Common triggers include protocol conditions, routing decisions, and application behavior.

Common causes

Resource moved to a different URI
Canonicalization or routing rule
Caching or method-preservation choice

How to fix it

Confirm redirect destination and protocol
Prevent redirect chains/loops
Use the correct permanent vs temporary code

Example request/response

GET /example HTTP/1.1
Host: errorlookup.com

HTTP/1.1 303 See Other

Browser/dev/server context

Use browser network tools, server logs, and APM traces together when diagnosing HTTP 303.

Related status codes

FAQ

Is HTTP 303 officially assigned?

Yes. This code is assigned in the IANA registry.