Network diagnostics
Review servers, CDNs, compression, security headers, resource activity, domains, cookies count, and realtime connections.
Chrome extension
Understand what your page is doing.
Web Technology Inspector reveals the network and browser-platform activity observable from the current page, so you can understand how it is built and behaving without sending data anywhere.
Useful signals, in one place
See the technologies and activity exposed through browser APIs, without inspecting application payloads or identifying application frameworks.
Browser activity
Inspect browser APIs, page timing, service workers, video playback, and WebGL or WebGPU renderer information.
Page signals
Discover PWA, metadata, preload, sign-in integration, and JavaScript global signals observed from the page.
Privacy by design
All diagnostics are processed locally. Web Technology Inspector does not use analytics or telemetry, make outbound requests, sell or share data, read application payloads, or store cookie values.
The extension keeps only derived per-tab diagnostic data during the browser session. Read the full privacy policy for details.