Cross Origin Isolation Planner
Plan COOP/COEP with explicit compatibility blockers. same-origin-allow-popups does not establish basic cross-origin isolation; credentialless drops credentials only for no-cors requests and does not bypass CORS. Assumes secure context, top-level response policy and allowed embedding. Suggested CORP applies to your resource response, not third-party resources. Actual crossOriginIsolated must be checked after deployment.
Enabling local controls…
Results
Review the settings and run. Editing inputs clears old results.
Processing model and limits
Plan COOP/COEP with explicit compatibility blockers. same-origin-allow-popups does not establish basic cross-origin isolation; credentialless drops credentials only for no-cors requests and does not bypass CORS. Assumes secure context, top-level response policy and allowed embedding. Suggested CORP applies to your resource response, not third-party resources. Actual crossOriginIsolated must be checked after deployment.
Data and model checked: MDN crossOriginIsolated ↗Source tool controls ↗
How to use this tool
Load the example, confirm field units and processing rules, then run locally. Editing any input clears the old result. Copy or download the complete output explicitly.
When not to use it
Plan COOP/COEP with explicit compatibility blockers. same-origin-allow-popups does not establish basic cross-origin isolation; credentialless drops credentials only for no-cors requests and does not bypass CORS. Assumes secure context, top-level response policy and allowed embedding. Suggested CORP applies to your resource response, not third-party resources. Actual crossOriginIsolated must be checked after deployment.