HeaderForge

Edit and apply HTTP request headers, manage reusable rules, and diagnose header conflicts with binary search.

🛠️ HeaderForge — HTTP Request Header Manager HeaderForge is a Chrome extension for developers, QA engineers, and API testers who need to modify HTTP request headers and troubleshoot header-related website issues. Create reusable header rules, apply or disable them when needed, and use built-in binary-search diagnostics to help identify problematic headers. Key Features 1. HTTP Header Injection and Override Add or modify custom HTTP request headers. Manage multiple header fields within a single rule. Apply header modifications using Chrome's Declarative Net Request API. Exclude selected domains from header modification. 2. Reusable Rule Management Create, edit, enable, disable, and delete header rules. Import and export configurations as JSON. Use a master switch to enable or disable header modifications. 3. Binary-Search Diagnostics Test a user-specified URL with different combinations of configured headers. Narrow down potential causes of request failures. Review diagnostic progress and the identified candidate headers. 4. Local-First Configuration Store rules and preferences locally in your browser. No account registration is required. No external developer-operated service is needed for rule management. Who Is HeaderForge For? HeaderForge is intended for web developers, API developers, QA engineers, and technical users working with HTTP request headers during development and testing. ⚠️ Important Notes Enabled rules may affect requests across websites unless domains are explicitly excluded. Review your rules before enabling them. Diagnostic tests send requests to the target URL. Results are intended to assist troubleshooting and do not guarantee identification of every possible website or network issue. HeaderForge supports Chromium-based browsers that provide the required extension APIs.