[Answers](https://scrapfly.io/blog)   /  [http](https://scrapfly.io/blog/tag/http)   /  [What case should HTTP headers be in? Lowercase or Pascal-Case?](https://scrapfly.io/blog/answers/what-case-should-http-headers-be)   # What case should HTTP headers be in? Lowercase or Pascal-Case?

 by [Bernardas Alisauskas](https://scrapfly.io/blog/author/bernardas) Aug 03, 2023 1 min read [\#http](https://scrapfly.io/blog/tag/http) 

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HTTP headers are often presented in varying case though usually in Pacal-Case like `Content-Type`. According to HTTP specification **header names are case-insensitive**, so `content-type` is the same as `Content-Type`.

However, various browsers treat this issue differently. For example, for **HTTP1.1** protocol, Chrome and Firefox will show the header name in the same case as it was sent by the server or **Pascal-Case**. This means when web scraping using HTTP1.1 it's important to replicate the exact case of expected headers to prevent the scraper from being blocked.

For **HTTP2**+ all headers are **required to be lowercase** so the scraper should always send headers in lowercase when scraping through HTTP2-capable clients.



 

    



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