2xx Success
Cacheable by default
203 Non-Authoritative Information
The request succeeded, but a transforming proxy modified the response the origin sent.
What causes it
- A proxy that compresses images, strips comments or rewrites HTML.
How to fix it
- If you need untouched bytes, send `Cache-Control: no-transform`.
At a glance
- Class
- 2xx Success
- Reference
- RFC 9110 §15.3.4
- Standardised
- Yes
- Retry the request?
- No — fix the request