Developer Launches Browser-Only HTTP Header Analyzer With Security Scoring

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A developer has released HTTP Header Analyzer, a client-side tool that evaluates HTTP response headers for security without any server-side processing or external dependencies. Users paste headers in Key: Value format and receive a security score from 0 to 100, graded A+ through F, based on the presence and correct configuration of critical headers. The tool assesses nine headers in total, including Content-Security-Policy and Strict-Transport-Security, awarding weighted points and flagging misconfigured values with plain-English explanations. It also categorizes headers into Security, Cache, Content, and Other groups, and supports sample presets for Nginx, Express, Apache, and an intentionally insecure configuration. Built as a single HTML file using vanilla JavaScript and CSS, the tool runs entirely in the browser and covers 147 test cases.

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