What Is URL Masking?
URL masking (also called domain masking or URL cloaking) is a technique that displays the content of one URL while keeping the original URL visible in the browser's address bar. It typically works by embedding the destination in an iframe.
Why It Matters
URL masking is a niche technique with specific use cases. Unlike a standard 301 redirect — which changes the URL in the browser bar — masking keeps the original URL visible while showing the destination content underneath. It’s a form of URL forwarding that prioritizes branding over SEO.
This sounds appealing but comes with significant trade-offs, especially for SEO. Unlike proper domain forwarding, masked domains don’t pass link equity and can trigger mixed content warnings if the destination uses HTTP.
How It Works
URL masking typically uses an HTML iframe that fills the entire browser window:
<html>
<head><title>Masked Domain</title></head>
<body style="margin:0">
<iframe src="https://real-site.com" style="width:100%;height:100%;border:none"></iframe>
</body>
</html>The visitor sees vanity-domain.com in their address bar, but the content comes from real-site.com. The browser’s address bar never changes as the user navigates within the iframe.
Key Trade-offs
SEO impact: Search engines see the iframe wrapper, not the actual content. The masked domain gets no SEO benefit — all ranking power stays on the destination domain.
User experience issues: Back/forward buttons may not work as expected. Bookmarking captures the masked URL, not the actual page URL. Copy-pasting the URL shares the masked domain, not the specific page.
Security concerns: Modern browsers increasingly restrict iframe behavior. Some sites send X-Frame-Options or Content-Security-Policy headers that prevent their content from being embedded in iframes.
When to Use URL Masking
Use URL masking when:
- You have a short vanity domain for a marketing campaign
- The branded URL must stay visible in the address bar
- You don’t need the vanity domain to rank in search results
Use a 301 redirect for everything else.
How Domain Forward Handles This
Domain Forward offers URL masking on Premium plans and above. For most use cases, we recommend standard 301 redirects with path forwarding instead, as this gives you full SEO benefits while still consolidating your traffic.
Related Terms
Related Features
Frequently
asked questions
Yes. Since the masked URL displays content via an iframe, search engines can't properly crawl or index the content under the masked domain. The SEO value stays entirely on the destination domain, and the masked domain appears empty to search engines.
URL masking makes sense when you want your vanity domain to remain visible in the address bar for branding reasons and you don't need the masked domain to rank in search engines. Common examples include short promo domains for landing pages.
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