Mobile Friendliness Tester

Name: Tester Przyjaznosci Mobilnej – Free Online Tool
Availability: InStock
Author: Webp

Fast, accurate and free online tester przyjaznosci mobilnej tool running directly in your browser.

Secure (SSL)

Client-Side Processing

100% Free

Go to tool

Instructions

1

Enter data
Enter content, paste text or load a file from disk.
2

Click the button
The tool will immediately process your data in the browser.
3

Get the result
Copy the finished text or save the file to your device.

                                                function runTool() {

                                                  return "Result ready in 0.1s";

                                                }

Settings

Set of links

Output format

URLs

Include legacy Tool Option

Result

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Mobile-friendliness tester - check the website's responsiveness for Google

Google has been using Mobile-First Indexing since 2019 - the mobile version of the website is the main indexed version. Mobile-unfriendly website = lower ranking. The tool checks key aspects of mobile-friendliness: viewport, font size, touch targets, speed and responsiveness.

mobile-friendly tester mobile-friendly test website responsiveness Google mobile SEO

Key requirements mobile-friendly

Viewport meta tag:. Fonts: min. 14-16px (not scaled by viewport). Touch targets: min. 48×48px, spacing min. 8px. No horizontal scrolling. No Flash. Speed: Core Web Vitals (LCP, CLS, FID/INP). Content wider than viewport: error.

Mobile-First Indexing

Google from 2019: indexes the mobile version as primary. Previously: desktop = primary. If you have a separate mobile version (m.domain.pl): make sure it has the same content as the desktop one. If responsive design: no problem. Check: Google Search Console → Mobile Usability report. PageSpeed Insights: separate mobile/desktop results.

Core Web Vitals for mobile

LCP (Largest Contentful Paint): < 2.5s (good). FID (First Input Delay) / INP: < 100ms. CLS (Cumulative Layout Shift): < 0.1. On mobile: LCP is usually worse (slower networks, less power). Optimization: lazy loading, image compression (WebP/AVIF), CSS/JS minification, CDN.

Most common mobile errors

Buttons too small (< 44px). Text too small (< 14px). No viewport meta. A popup that takes up the entire screen (Google penalizes it). Content wider than viewport (horizontal scroll). Loading too slow (> 3s). No alternative to hover-only interactions. Fixed elements covering the content.

Frequently asked questions

How to check mobile-friendliness for free?

Google Mobile-Friendly Test: search.google.com/test/mobile-friendly. Google Search Console: Mobile Usability report. PageSpeed Insights: pagespeed.web.dev. Chrome DevTools: Toggle device toolbar (Ctrl+Shift+M). Lighthouse: Ctrl+Shift+I → Lighthouse → Mobile. BrowserStack: Testing on Real Devices (Paid).

How to fix mobile-friendliness errors?

Missing viewport: add. Buttons too small: CSS min-height: 48px; min-width: 48px for clickable elements. Text too small: CSS font-size: 16px for body. Horizontal scroll: overflow-x: hidden on html, body. Flash: replace HTML5/JavaScript.

How does Google check mobile-friendliness?

Googlebot uses a mobile user-agent (Smartphone Googlebot). Checks: viewport, font sizes, touch targets, content width vs viewport. Rating: "Mobile-friendly" or bugs. Crawl rate: Google may crawl different pages at different rates. Google Search Console: Mobile Usability report shows specific URLs with errors.

How does AMP affect mobile SEO?

AMP (Accelerated Mobile Pages): Simplified HTML pages for mobile, hosted by Google. Status 2024: Google has retired AMP preferences in results (as of 2021). Carousel AMP Pages: Removed from Search. AMP still works and is fast, but it doesn't give you an SEO advantage over well-optimized core web vitals pages.

How to optimize images for mobile?

srcset:. Modern formats: WebP (30% smaller than JPEG), AVIF (50% smaller). Lazy loading: loading="lazy" attribute (native in HTML5). Dimensions in HTML: width and height attributes prevent CLS. Compression: Squoosh, TinyPNG.

Related tools: page speed analysis, responsiveness tester and Google PageSpeed Insights.