Mobile-Friendly Checker
Check viewport, tap targets, and mobile usability signals.
Source
Fetch a page or paste HTML — we audit mobile signals.
Score
-8 per warning, -18 per error.
Checks
Start here · What does mobile-friendly mean?
Mobile-friendly pages fit small screens, allow zoom, keep text readable, and make links and buttons easy to tap.
This checker fetches a page or accepts pasted HTML, then looks for common mobile signals such as the viewport meta tag, responsive images, fixed-width inline styles, tiny font declarations, and tap targets.
It is a quick HTML audit, not a full phone lab test. Use it to find obvious issues before you test the page manually on real devices.
When to use this tool
- Publishing a new template
Check a blog post, product page, or landing page before launch so missing viewport or fixed-width layout issues do not slip through.
- Mobile usability cleanup
Use it when users complain about pinching, horizontal scroll, tiny text, or hard-to-tap buttons.
- Image-heavy page review
Scan galleries, product pages, and tutorials to see whether images use responsive sizing hints.
- Accessibility sanity check
Catch zoom restrictions and very small text signals that make pages harder to use.
Examples
Walk through these with the form above — they are practice scenarios, not live data.
Landing page HTML
Try this
Fetch a live SaaS feature page or paste its rendered HTML.
What to look for
Start with viewport and pinch-zoom findings, then review fixed-width and tap-target notes.
Product category page
Try this
Fetch a category URL with many images and filter buttons.
What to look for
Look for responsive image warnings and remember that tap targets still need a real device review.
Short tutorial
Follow in order the first time you use the tool; later you can skip to the step you need.
- Step 1 - Fetch or paste HTML
Use the live page when possible. Paste rendered HTML if the page is behind a staging gate.
- Step 2 - Check the score
The score subtracts points for warnings and errors. Treat it as triage, not a final mobile performance grade.
- Step 3 - Fix viewport and zoom issues first
A missing viewport or disabled zoom affects many users at once, so handle those before smaller polish items.
- Step 4 - Review layout and images
Investigate fixed-width elements, tiny fonts, and images without responsive sizing.
- Step 5 - Test on a phone
After code changes, open the page on at least one real phone and rerun the checker.
More detail
New here? Skim Start here first, then run one Examples scenario in the form above.
Mobile-Friendly Checker does one job: check viewport, tap targets, and mobile usability signals. It lives under Technical SEO on SEOToolkits, where the beginner idea is simple: Technical SEO keeps pages crawlable, indexable, fast enough, and understandable to search engines.
FAQ
- Does this replace Google's mobile-friendly testing?
- No. This is a fast HTML-level audit. Use it alongside browser testing, Search Console reports, and real device checks.
- Why is disabling zoom a warning?
- Users with low vision often rely on pinch zoom. Blocking zoom can create accessibility and usability problems.
- Why does the tool mention tap targets but not measure them?
- HTML alone cannot reliably measure rendered button sizes. The tool counts interactive elements and reminds you to review them manually.
- Can a page be mobile-friendly but slow?
- Yes. Mobile layout and mobile speed overlap, but they are not identical. Use Page Speed Analyzer next.
Related tools
Same workflow cluster on SEOToolkits — open another module without leaving context.
Page Speed Analyzer
Lighthouse-style report with prioritized fix recommendations.
Image SEO Analyzer
Audit alt text, file size, format, lazy-loading, and dimensions.
Core Web Vitals Estimator
Estimate LCP, INP, and CLS heuristics from a live URL fetch and HTML parse.