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HTTP Header
Referer
RequestIndicates the address of the previous web page from which the current request originated.
HTTP header reference, syntax, examples, and developer usage.
What is the Referer header?
The Referer HTTP header is used to transmit metadata between a client and server as part of HTTP requests or responses.
HTTP headers define how content should be interpreted, cached, authenticated, secured, or processed by browsers and APIs.
Direction
This is a request header sent by the client to the server.
Syntax
Referer: <url>
Example
Referer: https://example.com/blog
Common use cases
- Traffic attribution
- Basic analytics
- Security filtering
Common mistakes
- Using the header in the wrong request or response context
- Sending invalid header values
- Incorrect header syntax
- Assuming the header automatically changes server behaviour