Dev UtilitiesLesson 148Free preview

HTTP Header Analyzer

This lesson is part of Web Developer Tools · All levels

Summary

HTTP Header Analyzer checks the header on request and response to help understand site behavior. You can see Content-Type, cache rules, cookies, CORS, as well as security header like CSP and HSTS. From these results, problems like an incorrect MIME type, a bad cache, or a loose security policy can be found faster.

Key points

HTTP header names are not sensitive to capital or lowercase letters
Content-Type determines how the browser interprets the body
Cache-Control sets the age of the cache and revalidates it
Important security headers include CSP, HSTS, and X-Content-Type-Options
Set-Cookie uses the attributes HttpOnly, Secure, and SameSite

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