Headers and Basic Authentication
These features are only available in paid plans and our Open Source plan. See our pricing plans for more details.
You can configure custom headers and basic auth for your Netlify site by adding a
_headers file to the root of your site folder.
The format is very simple. You can specify one or several URL paths with their additional headers:
## A path: /templates/index.html # Headers for that path: X-Frame-Options: DENY X-XSS-Protection: 1; mode=block /templates/index2.html X-Frame-Options: SAMEORIGIN
Paths can contain
:placeholder matches anything except
/ while a
* matches anything.
Here’s an example of settings the
X-XSS-Protection headers for all pages on your site:
/* X-Frame-Options: DENY X-XSS-Protection: 1; mode=block
The headers file can also be used to set basic auth headers. It’s a simple way to limit access to particular parts of your site. Basic Auth headers are not enabled for sites in our Open Source plan.
/something/* Basic-Auth: someuser:somepassword anotheruser:anotherpassword
This will trigger the built-in basic browser authentication for any URL under
/something. There’s two users defined here, one with the username “someuser” and password “somepassword”, the other with “anotheruser” and “anotherpassword”.
Unlike other headers in the
_headers file, the
Basic-Auth header will obviously not be sent as a standard HTTP header but used to control the appropriate HTTP headers for basic authentication.
Basic-Auth is only available if you’re on a Basic or higher plan.
Multi-key header rules
_headers file can include multiple headers with the same name. In that case, Netlify, will concatenate the values of those headers into a single header as described in the RCF 7230.
For example, you can include several Link header fields in the file, like this:
/* Link: </style.css>; rel=preload; as=stylesheet Link: </main.js>; rel=preload; as=script Link: </image.jpg>; rel=preload; as=image
And they will be collapsed into one header following the HTTP 1.1 specification:
Link: </style.css>; rel=preload; as=stylesheet, </main.js>; rel=preload; as=script, </image.jpg>; rel=preload; as=image
Testing header rules
You can test if the rules in your
_headers file are correct at Netlify’s Playground. Copy your rules there and click
Test rules. The playground will list all the invalid rules in your file if there is any.