Test Your Website on Mobile Devices
See how your website looks on phones and tablets. Free tool to test any site on mobile screen sizes and spot layout and usability problems.
About Mobile Friendly Test
The Doffl Mobile Friendly Test evaluates how well your web pages render and perform on handheld devices. It checks core mobile usability factors, including responsive layout behavior, viewport settings, and content scaling, directly in your browser.
Whether you are a web developer, SEO specialist, or site owner, this free tool helps you detect display issues before they impact user experience or search rankings. No registration or software setup is required.
Key features
- Instant viewport and responsive design verification
- Checks content scaling across mobile screen dimensions
- Identifies touch target and readability layout issues
- Runs entirely in your browser with zero installation
- Provides immediate feedback on mobile usability factors
- Completely free to use with no account required
How to use Mobile Friendly Test
- Enter the full URL of the webpage you want to evaluate.
- Click the analyze button to initiate the mobile test.
- Review the rendered layout across simulated mobile viewports.
- Inspect the report for sizing, viewport, and usability errors.
Who is it for?
- Web designers testing responsive layouts during site development
- SEO professionals auditing client pages for mobile usability compliance
- E-commerce owners ensuring checkout flows render clearly on smartphones
- Content editors verifying that new articles format properly on mobile devices
Frequently asked questions
What is a mobile friendly test?
A mobile friendly test is an automated check that determines whether a website adapts correctly to mobile screen sizes and offers smooth navigation for smartphone users.
Why is mobile friendliness important for SEO?
Major search engines use mobile-first indexing, meaning they primarily evaluate the mobile version of your page to determine search rankings. Poor mobile usability can negatively affect your organic visibility.
Is this mobile friendly test free to use?
Yes, this tool is completely free to use with no account registration or software installation required.
What causes a webpage to fail a mobile usability check?
Common issues include content wider than the screen, text that is too small to read without zooming, touch elements placed too close together, and missing viewport meta tags.
Can I test specific subpages or only homepages?
You can test any publicly accessible URL, including specific landing pages, product listings, or blog articles.