Free Iframe Tester Tool
Preview a website in an iframe, check its embedding restrictions, and generate responsive HTML embed code.
Checking response headers…
Fetching the public response. This can take a few seconds.
Response headers & redirects
No URL loaded
Enter a URL above or load the demo page.
Customize your embed Dimensions, sandbox & code
Sandbox settings affect the preview and exported code. Scripts + same-origin are convenient for third-party embeds, but are not a security boundary for untrusted content hosted on your own origin.
<!-- Your iframe code will appear here. -->Responsive previews
Preview embedded pages at desktop, tablet, and mobile dimensions.
Header diagnostics
Inspect X-Frame-Options and CSP to identify embedding restrictions.
HTML code generation
Configure dimensions and sandbox permissions, then copy the HTML.
Iframe guides
All guidesFrequently asked questions
What is an iframe tester?
An iframe tester lets you preview a webpage inside another webpage. This tool also fetches the target’s public response headers, explains framing restrictions, and generates HTML you can use in your own project.
Why does a website refuse to connect in an iframe?
The site may send X-Frame-Options: DENY or SAMEORIGIN, or a Content-Security-Policy frame-ancestors directive that excludes this origin. HTTPS issues, redirects, authentication, and browser privacy settings can also prevent an embed from working.
Can I embed any website?
No. The website owner controls where their content can be embedded. This tool respects those restrictions. If you do not control the site, use an official embed URL, supported API, or a normal link.
Does a successful header check guarantee my iframe will work?
No. The server checks a public, unauthenticated response. Your browser may receive different headers or redirects. Cookies, sandbox permissions, nested ancestors, and the parent page’s own frame-src policy can also affect the result. Always verify the preview and your actual integration.
Can this tool inspect iframe cookies or JavaScript errors?
Not for arbitrary third-party sites. Browser same-origin rules prevent access to their document, cookies, storage, and console. Use your browser’s developer tools or add explicit cooperation in an embedded app you control.
Related iframe tools
Generate embed code or inspect response headers separately.