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Helping busy developers monitor, debug, and observe their systems. Explore Resources from Request Metrics.

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Online HTTP Cache Checker

This tool shows how web browsers will cache a URL. HTTP caching reuses previously loaded resources and can greatly impact performance. Learn more about [HTTP Caching](/web-performance/http-caching).

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Request Metrics monitors your software's APIs, behavior, and performance as your users see them. We're making Observability tools for everyone.

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