Free Responsive Testing Tool

Check Site Mobile Friendly in Seconds

Paste any URL and instantly preview how it behaves on mobile, tablet, laptop and desktop. Drag to resize, watch the layout reflow, and catch responsive bugs before your readers do.

NO SIGN-UP 100% FREE WORKS ON ANY URL LIVE BREAKPOINTS
The Checker

Check Site Mobile Friendly โ€” Live Previewer

480 768 1024 1440
1024px
Nothing loaded yet Paste a URL above and hit "Check Mobile Friendliness" to preview it here.
โ„น๏ธ Note: Some sites block being shown inside another page for security reasons (this is a setting on their end, not a bug here). If a preview stays blank, use Open in New Tab โ†— to test it directly.
Features

Everything you need to check site mobile friendly, in one panel

Built for bloggers and site owners who want fast, visual answers โ€” not a wall of technical jargon.

01

Live device preview

See your blog exactly as it renders on real mobile, tablet, laptop and desktop widths โ€” updated instantly.

02

Drag-to-resize frame

Grab the handle and drag freely between 280px and 1600px to find the exact width where your layout breaks.

03

Breakpoint ruler

Common CSS breakpoints (480 / 768 / 1024 / 1440) are marked right on the slider so you know what you're testing.

04

One-click presets

Jump straight to Mobile, Tablet, Laptop or Desktop with a single tap โ€” no manual typing of pixel widths.

05

Works on any URL

Check your own Blogger site, a client's site, or a competitor's blog โ€” anything with a public web address.

06

No sign-up, ever

Nothing to install, no account, no email required. Paste a link and start checking mobile friendliness immediately.

How To Use

Check site mobile friendly in four quick steps

Paste your URL

Drop your blog or website link into the box at the top of the tool.

Hit Check

Click "Check Mobile Friendliness" and the site loads inside the preview frame.

Switch devices

Tap Mobile, Tablet, Laptop or Desktop, or drag the handle to any custom width.

Spot the issues

Watch for overlapping text, cut-off images, or tiny buttons โ€” then fix your CSS accordingly.

Who Can Use It

Made for anyone who publishes on the web

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Bloggers

Confirm posts read well on phones before hitting publish.

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Web Designers

Preview layouts across breakpoints while designing.

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Developers

Debug responsive CSS without opening dev tools.

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SEO Specialists

Check mobile usability since Google ranks mobile-first.

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Store Owners

Make sure product pages convert on every screen size.

Suggestions

Tips to make your site more mobile friendly

Found an issue while testing? Start with these common fixes.

1

Use a responsive theme

Pick a Blogger template built with fluid grids and media queries from the start.

2

Set a proper viewport tag

Make sure <meta name="viewport"> is present so mobile browsers scale content correctly.

3

Keep tap targets large

Buttons and links should be at least 44ร—44px so they're easy to tap on small screens.

4

Compress your images

Large images slow down mobile load times โ€” resize and compress before uploading.

5

Avoid fixed-width elements

Use percentages, fr, or max-width instead of hard pixel widths.

6

Test at multiple widths

Don't just check one phone size โ€” drag through 320px to 480px to catch edge cases.

FAQ

Common questions

Yes. There's no cost, no account, and no limit on how many URLs you can preview.

Some sites set headers that block being embedded inside another page. Use "Open in New Tab" to view them directly instead.

No โ€” this is a fast visual previewer for design and layout. For official crawlability results, pair it with Google Search Console.

Yes โ€” this whole widget is a single paste-in HTML block, built specifically to drop into a Blogger page or gadget.

Ready to check your site's mobile friendliness?

Scroll up, paste your URL, and see your layout reflow in real time.

About Us

Check Site Mobile Friendly is a free, in-browser tool that lets bloggers, designers and developers preview how any website behaves across mobile, tablet, laptop and desktop widths โ€” instantly, without installing anything.

We built it because responsive design shouldn't require guesswork. Paste a link, drag the frame, and see exactly where your layout needs work.

Contact Us

Questions, feedback, or found a bug? We'd love to hear from you.

Email: yourname@example.com

Response time: We typically reply within 1โ€“2 business days.

Replace the email address above with your own before publishing this page.

Privacy Policy

This tool runs entirely in your browser. We do not store, log, or share the URLs you check, and we do not require any personal information to use the checker.

Cookies

This site may use standard Blogger/Google cookies for analytics and ads, as governed by Google's own privacy policies.

Third-party content

When you preview an external site, that site's own privacy policy applies to any data it collects while loaded in the frame.

Edit this policy to match your actual data practices before publishing.

Terms of Service

By using this tool, you agree to use it only for lawful, legitimate testing of websites you own or have permission to preview.

The tool is provided "as is" without warranty of any kind. We are not responsible for the availability, content, or behavior of any third-party site previewed here.

We reserve the right to modify or discontinue this tool at any time without notice.

Disclaimer

Check Site Mobile Friendly is an independent visual preview tool and is not affiliated with Google, Blogger, or any browser vendor.

Results shown here are for visual/layout reference only and are not an official mobile-usability certification. For authoritative results, always verify with official tools such as Google Search Console.