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Mobile Friendly Test

Check your HTML and preview your website on desktop, tablet, and mobile screens with our simple online mobile friendly testing tool.

Mobile-Friendly Website Test

Check your HTML and preview your website at different screen widths

Analyze HTML
Live Device Preview
Checklist
Desktop (1280px)
Tablet (768px)
Mobile (375px)
Best-effort: many sites send an X-Frame-Options or Content-Security-Policy header that blocks embedding entirely — if a frame stays blank, that's the site refusing to be framed, not a bug here. When it works, this shows the real, live page at each width.
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How to Check Your Website’s Mobile-Friendliness

Hey guys, a website may look great on a computer, but what about when someone opens it on a phone or tablet? A good website should adjust to different screen sizes and stay easy to use.

Sometimes a page may look perfect on a desktop but look too wide, too small, or hard to use on a phone. That is why we made our Mobile Friendly Test. It gives you a quick way to check your HTML and see how your page looks at different screen sizes.

Now, let us see what our tool can do and how you can use it.

What is a Mobile-Friendly Test?

A Mobile Friendly Test online is a simple way to check if a web page is ready for people using phones and tablets. It looks at important parts of your HTML, such as the viewport tag, zoom settings, small fonts, fixed-width elements, responsive CSS, and website icons.

Our tool also lets you see your page at Desktop (1280px), Tablet (768px), and Mobile (375px) widths. This helps you spot things that may not look right on smaller screens.

How to Use Our Mobile Friendly Test

Here are the simple steps to use our tool:

  • Step 1: Open the Tool: Visit the Mobile Friendly Test on LGATools.com.
  • Step 2: Add Your HTML: If you want to check your markup, paste your HTML into the tool.
  • Step 3: Analyze the HTML: Open the Analyze HTML tab and run the check.
  • Step 4: Read the Checklist: Look at the results and see which checks have a ✓ and which have a ✕.
  • Step 5: Open Live Device Preview: Use the preview area when you want to see your page at different widths.
  • Step 6: Check Each View: Look at the Desktop (1280px), Tablet (768px), and Mobile (375px) views.
  • Step 7: Make Changes: If you find something that does not look right or a check needs attention, update your page and test it again.

How to Add Our Mobile Friendly Test on Your Site

Want to place our tool on your own website? You can use the embed option from LGATools:

  1. Go to LGATools.com and sign up or log in.
  2. Open the dashboard and select Generate API.
  3. Choose the tool and click Generate Code.
  4. Select a plan and complete checkout.
  5. Go to the Tool List page after payment.
  6. Copy the generated embed code.
  7. Paste it into your website's Custom HTML section.
  8. Publish or update the page.

Features of Our Mobile Friendly Test

Our online mobile friendly checker gives you simple checks and previews to help you review your web page:

  • Analyze HTML: Check your HTML markup for important mobile-related signals.
  • Viewport Meta Tag Check: Finds whether your HTML has a viewport meta tag.
  • Zoom Check: Checks if pinch-to-zoom has been disabled.
  • Responsive CSS Check: Looks for @media queries inside embedded <style> blocks.
  • Tiny Font Check: Finds font sizes below 12px in embedded CSS.
  • Fixed-Width Check: Looks for inline fixed-width elements over 480px.
  • Favicon / Touch Icon Check: Checks if your HTML has a favicon or Apple touch icon.
  • Desktop Preview: View your page at 1280px width.
  • Tablet Preview: View your page at 768px width.
  • Mobile Preview: View your page at 375px width.
  • Easy Checklist: Shows the HTML check results with clear ✓ and ✕ marks.
  • Live Page Preview: Shows the real page inside the preview when the website allows iframe loading.
  • Best-Effort Preview: Tells you when a website blocks iframe loading through settings such as X-Frame-Options or Content-Security-Policy.
  • Browser-Based Analysis: The HTML check runs entirely in your browser.
  • Load Example: Use sample HTML to quickly see how the checker works.
  • Clear and Reset: Remove the current content and start a fresh check.
  • Embedding: Put our website mobile friendly checker on your own website with the available embed option.

Use Cases of Mobile Friendliness Test

Our mobile friendliness checker can be useful in many website tasks. Here are some common ways you can use it:

  • New Website Pages: Check your page while you are building it.
  • Mobile Layout Checks: See if your page looks right on a phone-sized screen.
  • Tablet Checks: Review your page at a tablet width before publishing it.
  • Desktop Checks: See how your page looks on a wider screen.
  • HTML Learning: Students can use the checklist to learn about common HTML settings.
  • Website Updates: Check a page again after making changes to its layout or code.
  • Responsive Design Work: Review your page when you are working on different screen sizes.
  • Client Projects: Developers can use it for a quick review of a client's page.
  • HTML Templates: Test a template before adding it to a website.
  • Before Publishing: Do a quick check before making a new page live.

Why Our Tool Makes Mobile Checking Easier

We made our mobile friendly website test to make page checking feel simple instead of confusing. You can quickly review your page and understand the results without dealing with a long or difficult report.

  • Saves Your Time: Get a quick idea of how your page is doing without checking every part by hand.
  • Easy to Understand: The simple results help you know where you may need to look.
  • Useful for Quick Reviews: Check a page while you are building, changing, or fixing it.
  • Helps You Spot Issues: A quick check can point you toward parts of your page that may need another look.
  • Good for Different Users: Website owners, students, and developers can all use it for simple page checks.
  • No Complicated Process: You can start checking without going through many steps.
  • Helps Before Publishing: Use it as a quick review before making your page live.

How to Make Your Page Better for Mobile

A mobile-friendly page should be easy to read and use on a small screen. Keep your content simple, make sure important buttons are easy to tap, and avoid elements that are too wide for the screen:

  • Check the Mobile View: Open the 375px preview and look for anything that feels too wide or difficult to use.
  • Use Readable Text: Avoid very small text that can be hard to read on a phone.
  • Keep Content Flexible: Make sure images, boxes, tables, and other elements can fit smaller screens.
  • Use Responsive CSS: Add suitable @media rules when your layout needs to change for smaller screens.
  • Do Not Block Zoom: Let users zoom in when they need a closer look.
  • Check the Viewport: Make sure your page has a proper viewport meta tag.
  • Test More Than One Screen: Check the desktop, tablet, and mobile views instead of relying on only one size.
  • Review After Changes: Test the page again after making important layout or design changes.

Problems and Fixes

Here are some common issues you may see while using the tool:

  • Problem: The Live Device Preview stays blank. Fix: Some websites block iframe loading with X-Frame-Options or Content-Security-Policy. If this happens, the website is refusing to be shown inside the frame. It does not necessarily mean there is a problem with our tool.
  • Problem: No responsive @media queries are found. Fix: Our check looks inside embedded <style> blocks. It cannot see @media rules stored in external CSS files.
  • Problem: The viewport check shows ✕. Fix: Check your HTML and add the viewport meta tag if your page needs it.
  • Problem: Tiny font sizes are found. Fix: Look through the embedded CSS and review any font size below 12px.
  • Problem: A fixed-width element is found. Fix: Check the inline style and see if the element needs a more flexible width.
  • Problem: The page looks good at 1280px but not at 375px. Fix: Check your layout and responsive rules for the smaller screen. Look for content that becomes too wide or difficult to use.
  • Problem: The favicon or touch icon check fails. Fix: Add the needed icon markup to your HTML if you want to use these icons.

Understanding the Device Preview

The Live Device Preview gives you three views of your page.

  • Desktop (1280px): This is the widest view and gives you an idea of how the page looks on a desktop-sized screen.
  • Tablet (768px): This view gives you a smaller space and helps you see how the layout changes.
  • Mobile (375px): This is the narrowest view. It is useful for spotting content that may not fit comfortably on a phone-sized screen.

Keep in mind that this is a best-effort preview. Some websites do not allow themselves to be loaded inside an iframe. When that happens, the preview may stay blank because the website has blocked framing.

Final Thoughts

So guys, we have reached the final part of our guide. By now, you know how to use the HTML checker, how to view your page on desktop, tablet, and mobile widths, and how to understand some common issues.

Personal Recommendation: I recommend making a quick three-screen check before putting your page online. It is an easy step that can help you notice layout problems that may be missed when checking only one screen.

If you have a question, suggestion, or problem with our tool, please get in touch through LGATools.com. We always appreciate your feedback and are here to help whenever you need us.

Simple FAQs

You may have some questions about how to check mobile friendly website, so we have answered the most common ones below:

1. What is a mobile friendly website checker?

A mobile friendly site test helps you check some important parts of a web page for mobile use. Our tool also lets you see how a page looks at Desktop (1280px), Tablet (768px), and Mobile (375px) widths.

2. How do I test if my website is mobile-friendly?

You can use our tool for a quick check:

  • Add your HTML code.
  • Open the Analyze HTML tab.
  • Review the checklist results.
  • Open Live Device Preview to view the page at different widths.
  • Check the desktop, tablet, and mobile views for layout problems.

3. What does the Analyze HTML tab check?

The HTML check looks for several useful signals in your markup:

  • Viewport meta tag
  • Disabled pinch-to-zoom
  • Responsive @media queries
  • Font sizes below 12px
  • Fixed-width elements over 480px
  • Favicon or Apple touch icon

4. What are the device widths in the Live Device Preview?

The preview gives you three different views. Desktop uses 1280px, Tablet uses 768px, and Mobile uses 375px. You can compare these views to see if your page changes well as the screen gets smaller.

5. Why is my website blank in the Live Device Preview?

A blank preview does not always mean there is a problem with the tool. Some websites have security rules that do not allow their pages to be loaded inside an iframe. This can happen because of settings such as X-Frame-Options or Content-Security-Policy.

If this happens, the website itself may be refusing to be shown inside the preview. You can still use the Analyze HTML section to check the HTML signals supported by the tool.

6. Does the website mobile friendly test check external CSS?

Not completely. The responsive CSS check looks for @media queries inside embedded <style> blocks. External stylesheets are not visible to this check, so their media queries will not be included in the result.

7. Why is the viewport meta tag important?

The viewport tag helps the browser handle a web page on different screen sizes. If it is missing or not set correctly, a page may not behave as expected on a phone. Our checker looks for this tag in the HTML you provide.

8. Can I check my page without publishing it?

Yes. You can check your HTML while you are still working on your page. This is useful when you are building a new page or fixing an existing one.

You can also use the device preview to look at the page before making it live. This can help you find layout problems early.

9. Is my HTML safe when I use the Analyze HTML feature?

The Analyze HTML check runs entirely in your browser. This means the HTML analysis is performed on your own device rather than needing the code to be sent away for the check.

10. What does a ✕ result mean?

A ✕ means the checker did not find the expected signal for that particular check. It does not always mean your whole website is bad or unusable.

For example, a responsive CSS check may show ✕ when your @media rules are in an external stylesheet, because that stylesheet is not visible to the tool.

11. Can I use this tool to check a website after making changes?

Yes. It is useful to run another check after changing your HTML or page layout. You can compare the results and look at the different device views again.

This is especially helpful before publishing a new page or finishing a major design update.

12. Is this a complete mobile website test?

No. Our tool is made for a quick mobile-friendly check, not a complete test of every part of a website. It checks the HTML signals listed in the tool and provides live previews at three screen widths.

So, if you want a simple way to review your markup and see how a page looks on different screen sizes, this tool can be a useful starting point.

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