Q: What are HTTP headers?
HTTP headers are key-value pairs sent between client and server in HTTP requests and responses. They carry metadata like content type, authentication, caching directives, and more.
Q: What is the difference between request and response headers?
Request headers are sent by the client (e.g., User-Agent, Accept, Authorization). Response headers are sent by the server (e.g., Content-Type, Set-Cookie, Cache-Control).
Q: What format should I use for input?
Enter one header per line in "Header-Name: Header-Value" format. The colon and space after the header name are required.
Q: Is it safe to paste Authorization headers?
Yes. All parsing is done in your browser. No data is transmitted to any server. However, be cautious when sharing your screen.
Q: How many headers are recognized?
Over 30 commonly used HTTP headers are recognized with descriptions. Unknown headers are still parsed and displayed, just without a description.