Informational
HTTP 103: Early Hints
HTTP 103 means the server is sending early hints before the final response.
Meaning
The server can send link hints so the client can start preloading resources.
Common causes
Servers use it to improve page load performance with preloadable assets.
What to check
Check Link headers and ensure the final response still sends the intended status and resources.
Example response
HTTP/1.1 103 Early HintsReferences
- Registry
- IANA HTTP Status Code Registry
- Spec
- RFC 8297 §2
- Guide
- MDN 103 Early Hints
Related HTTP status codes
Nearby codes often answer the next debugging question.