kb/data/developer.mozilla.org/en-US/docs/Glossary/HSTS-0.md

9.9 KiB

title chunk source category tags date_saved instance
HSTS - Glossary | MDN 1/3 https://developer.mozilla.org/en-US/docs/Glossary/HSTS reference web, html, css, javascript, documentation 2026-05-05T05:33:24.010388+00:00 kb-cron

MDN HTML HTML: Markup language

HTML reference

HTML guides

Markup languages

CSS CSS: Styling language

CSS reference

CSS guides

Layout cookbook

JavaScriptJS JavaScript: Scripting language

JS reference

JS guides

Web APIs Web APIs: Programming interfaces

Web API reference

Web API guides

All All web technology

Technologies

Topics

Learn Learn web development

Frontend developer course

Learn HTML

Learn CSS

Learn JavaScript

Tools Discover our tools

About Get to know MDN better

Blog

  1. Glossary
  2. HSTS

HSTS

HTTP Strict Transport Security lets a website inform the browser that it should never load the site using HTTP and should automatically convert all attempts to access the site using HTTP to HTTPS requests instead. It consists in one HTTP header, Strict-Transport-Security, sent by the server with the resource. In other words, it tells the browser that changing the protocol from HTTP to HTTPS in a URL works (and is more secure) and asks the browser to do it for every request.

In this article

See also