demo · v142

Process Tree Visualizer

Toggle which origins have Origin-Agent-Cluster: ?1 and watch Chrome 142's renderer process layout side-by-side with the old site-keyed layout. Same five frames, totally different process tree.

which origins opt in?

https://www.example.com (main) https://app.example.com (subdomain frame 1) https://api.example.com (subdomain frame 2) https://docs.example.com (subdomain frame 3) https://other.test (cross-site frame)

site-keyed (legacy)

origin-keyed (Chrome 142+)

this page is origin-isolated?

—

crossOriginIsolated?

—

this origin

—

relevant headers

// Each origin sends this from its top-level response to opt in.
HTTP/1.1 200 OK
Origin-Agent-Cluster: ?1

// If you also need SharedArrayBuffer / high-resolution timers:
Cross-Origin-Opener-Policy: same-origin
Cross-Origin-Embedder-Policy: require-corp

which origins opt in?

site-keyed (legacy)

origin-keyed (Chrome 142+)

relevant headers

see also