Iframe Embed Compatibility Checker

Check if a webpage allows iframe embedding with X-Frame-Options, CSP, and browser sandbox tests.

Target Website URL

Embedding Origin

Audits X-Frame-Options, CSP frame-ancestors, redirect chains, and sandbox browser behavior.

Key Capabilities

6 capabilities

#	Capability
01	Audits X-Frame-Options (DENY, SAMEORIGIN, ALLOW-FROM) directives
02	Evaluates Content-Security-Policy frame-ancestors rules against embedding origins
03	Interactive in-browser sandboxed iframe rendering preview probe
04	Traces redirect chains that might alter embedding security headers
05	Clear technical diagnosis distinguishing frame restrictions from CORS
06	Actionable configuration guides for developers to safely enable or restrict embedding

How to Use the Iframe Embed Compatibility Checker

Step 01

Enter Target URL

Provide the webpage URL you wish to embed.

Step 02

Specify Origin

Enter your embedding website domain (defaults to https://althunt.io).

Step 03

Inspect Verdict

Review whether embedding is allowed, blocked, or restricted, and test the sandbox preview.

Frequently Asked Questions

What is the difference between X-Frame-Options and CSP frame-ancestors?

CSP frame-ancestors is the modern W3C standard that supersedes X-Frame-Options, allowing granular origin whitelists. When both are present, modern browsers prioritize CSP frame-ancestors.

Does CORS affect iframe embedding?

No. Cross-Origin Resource Sharing (CORS) governs XMLHttpRequest, fetch(), and cross-origin resource reads. Iframe embedding is controlled exclusively by frame headers (X-Frame-Options and CSP frame-ancestors).

How do I allow my website to be embedded on a specific partner domain?

Set Content-Security-Policy: frame-ancestors 'self' https://partner.com. This protects against clickjacking on untrusted sites while permitting authorized partners.

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