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Dev tools · March 12, 2019

HttpModifier

Modify HTTP Headers On-The-Fly

HttpModifier launched on March 12, 2019 with 3 votes. The site was still online in September 2026, 7 years on.

What it does

With HttpModifier you can add, remove or change any HTTP request or response headers without modifying the server code. For example, you can add CORS headers, change User-Agent name, remove cookies, disable caching and much more.

How to Modify HTTP Request and Response Headers

Learn how to modify HTTP request and response headers and body on the fly. Note: HTTP Modifier applies to regular HTTP and HTTPS traffic. gRPC calls are captured without modifying their messages, and WebSocket connections are captured without modifying their frames. If you need to replace the entire server response rather than modify parts of it, use the Auto-Responder instead. Combined with the TCP/IP Redirector , the HTTP Modifier also enables transparent redirection of HTTP traffic between endpoints. When a browser blocks cross-origin requests , use the HTTP Modifier to inject Access-Control-Allow-Origin and related CORS headers into responses — verify frontend behavior before…from httpdebugger.com

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