No Local HSTS is a free Chrome extension designed for web developers who test websites on their local machines. This tool effectively strips the Strict-Transport-Security (HSTS) header from responses originating from localhost servers. By doing so, it allows developers to seamlessly switch between HTTP and HTTPS without the automatic redirection that HSTS enforces.

This extension is particularly beneficial when working on projects that require both protocols, as it mitigates the complications that arise from HSTS settings. By disabling these headers, No Local HSTS provides a smoother development experience, enabling developers to test their applications without interruptions or forced upgrades to HTTPS.