instant.tw

HSTS Header Builder

HTTP Strict Transport Security header tells browsers to always use HTTPS for your domain.

Generated header

 
Preload caveats: only enable if your entire apex + subdomain tree is HTTPS-ready. Removal from the preload list takes 6-12 weeks.
  
   
     
   
  
 
About this tool
 
 HSTS Header Builder is a single-purpose utility on instant.tw,
        a free toolbox of  calculators, converters,
        generators, and quick lookups. Everything works in your browser — nothing
        is uploaded, nothing is stored on a server unless explicitly noted.

 
Category: Developer Tools — Advanced. Browse more Developer Tools — Advanced tools.