iFrame Test is a free online utility that allows you to instantly check if any website can be embedded. By simply entering a URL, the tool performs a live embedding test and provides an immediate visual result, showing whether the site loads correctly or is blocked. This offers a reliable way to verify embeddability before development. Beyond this primary function, the site provides resources for web developers and security auditors. These include a generator for secure iframe embed code with sandbox attributes and a tool to help build correct Content-Security-Policy (CSP) headers to manage embedding permissions effectively.
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