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Cookie Samesite Simulator

Simulate a previously accepted Domain cookie under explicit schemeful-site assumptions. Additional site inputs avoid guessing registrable domains without a Public Suffix parser; verify them yourself. Checks domain/path slash boundary, HTTPS, None+Secure, Strict, and explicit-Lax safe top navigation. Excludes cookie acceptance, host-only mode, expiry, partitioning, browser third-party rules and unspecified-Lax grace periods.

cookie-samesite-simulatorLOCAL WORKSPACE

Enabling local controls…

Inputs and settings

Processed in this tab without uploading or storing inputs. Each text field is limited to 32 KiB and complete output to 1 MiB; additional format and model limits apply.

Results

Review the settings and run. Editing inputs clears old results.

Processing model and limits

Simulate a previously accepted Domain cookie under explicit schemeful-site assumptions. Additional site inputs avoid guessing registrable domains without a Public Suffix parser; verify them yourself. Checks domain/path slash boundary, HTTPS, None+Secure, Strict, and explicit-Lax safe top navigation. Excludes cookie acceptance, host-only mode, expiry, partitioning, browser third-party rules and unspecified-Lax grace periods.

Data and model checked: HTTP cookies SameSite ↗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

Simulate a previously accepted Domain cookie under explicit schemeful-site assumptions. Additional site inputs avoid guessing registrable domains without a Public Suffix parser; verify them yourself. Checks domain/path slash boundary, HTTPS, None+Secure, Strict, and explicit-Lax safe top navigation. Excludes cookie acceptance, host-only mode, expiry, partitioning, browser third-party rules and unspecified-Lax grace periods.