Disabling HSTS for a specific domain in Chrome

This post explains how to disable HSTS for a specific domain.
It was written using Chrome 91.0.4472.114.

• This does not apply when the domain is preloaded, such as with Strict-Transport-Security: ...; preload.

Disable HSTS

1. Enter chrome://net-internals/#hsts in Chrome’s address bar.
2. Enter the domain to disable under Delete domain security policies, then click Delete.
3. Done

Before disabling

After disabling

You can confirm that the Proceed to [site] (unsafe) button appears.

Check whether the domain is preloaded

Domains submitted to the HSTS Preload List cannot be disabled because Chrome includes the list internally.

Preloaded domain (wikipedia.org)

HSTS Preload List lookup result

Query result in chrome://net-internals/#hsts

Domain with only the header set (can be disabled)