Real data. Clear context.
Every network report identifies its source and time. Every chart is derived from the data returned for your query.
Performance
Google PageSpeed Insights runs Lighthouse for your selected device. Scores use Google’s reported categories. Timing metrics use the reported units. Real-user field metrics are shown only if Google supplies them. A free API key can help when anonymous quota is exhausted.
Domain registration
We load IANA’s RDAP bootstrap to find an authoritative service for the domain’s top-level extension. Unsupported TLDs return unknown. We distinguish registry not-found responses from connection errors and rate limits.
DNS
Google Public DNS resolves the requested record types. Answer counts and TTLs reflect that response. Resolver errors are displayed by type; an empty answer does not imply an available domain.
HTTP and HTML
Public HTTP requests follow a bounded redirect chain. Common private destinations are blocked. The analyzer reads up to 2 MB of HTML and reports whether it was truncated. Timing covers one server-side request. Selected header-presence and metadata checks are reported with their criteria.
CDN libraries
cdnjs provides searchable library metadata and versioned assets. Integrity values are displayed only when supplied by cdnjs. CDN detection on websites uses visible response-header evidence rather than guesses.
Local utilities
JSON formatting uses the browser’s JSON parser. No network request is made with the input. Reports are downloadable snapshots, not stored monitoring history.