Meta Viewport Tag Checker
Checks the page specifies a viewport tag matching the device width.
What this tool checks
Responsive viewport meta tag
Checks for <meta name="viewport" content="width=device-width, initial-scale=1">.
Why it matters: Without a viewport meta tag, mobile browsers render the page at desktop width and zoom out, making it hard to read and use.
If it fails: Add <meta name="viewport" content="width=device-width, initial-scale=1"> to <head>.
Source: developer.mozilla.org/en-US/docs/Web/HTML/Viewport_meta_tag
Related tools
- Favicon CheckerChecks the page declares a favicon, the icon browsers and Google search results show.
- Webpage iFrame TestDetects embedded iframes and checks each has a descriptive title.
- Webpage Tap Target Size TesterChecks links and buttons are large enough to tap accurately on a touchscreen.
- Font Size and Legibility CheckerChecks rendered text is not too small to read comfortably on mobile.
- Mobile Responsiveness TesterChecks the viewport tag, tap targets, font size and horizontal scroll together.