Test d'optimisation mobile
Paste a page\u2019s HTML and instantly see how it renders at every common mobile breakpoint — iPhone SE (375px), iPhone Pro (390px), Pixel (412px), iPad (768px). Plus an audit of viewport meta, font sizes, and tap-target spacing.
Paste HTML
Mobile Audit + Preview
How to use the Mobile-Friendly Test
Paste your page HTML. Pick a breakpoint to preview — iPhone SE (375px) is the most common starting point, then test Galaxy S22 (360px) for the narrowest, then Pixel (412px) for a wide phone, then iPad (768px) for tablet. The tool runs four key audits — viewport meta, device-width, accessibility zoom, and inline font sizes — and renders a sandboxed iframe preview at the chosen breakpoint.
Pourquoi cet outil est important
Google has used mobile-first indexing since 2019: it indexes the mobile version of your site, not the desktop. If your mobile rendering breaks, your rankings break. The viewport meta tag is the single most important mobile signal — without it, Google assumes your page is desktop-only and penalizes mobile users. The tool catches this and other common mobile-rendering issues in one view.
Cas d'utilisation courants
- Pre-launch mobile audit of a landing page
- Spotting accessibility issues (tiny inline fonts, blocked zoom)
- Comparing how a redesign renders at multiple breakpoints
- Checking how text-heavy emails preview at narrow widths
- Diagnosing why mobile rankings dropped after a CSS change
- Building a mobile QA checklist for editors and developers
Why we preview HTML in an iframe
Browsers block fetching arbitrary URLs from a tool running in the browser (CORS). Pasting HTML gives you a sandboxed preview of exactly the markup you paste — useful for staging environments, behind-firewall pages, and HTML you generated programmatically. The preview is sandboxed (no scripts execute) for security.
Foire aux questions
Why does my preview look broken?
The iframe sandbox blocks external scripts and stylesheets for security. The preview reflects the inline HTML/CSS only. For a fully rendered preview use Chrome DevTools device emulation on the live page.
What viewport meta tag should I use?
is the standard. Avoid user-scalable=no — it blocks accessibility zoom and is a Google penalty signal.
What font size is too small for mobile?
Below 14px (16px is ideal). Anything below 12px is unreadable for most mobile users and triggers Google\u2019s “Text too small to read” warning in Search Console.
How does this compare to Google\u2019s official Mobile-Friendly Test?
Google\u2019s test fetches the URL with their crawler — definitive, but only works on publicly accessible pages. Our tool runs on pasted HTML — works on staging, behind firewalls, or for pre-launch validation.
Need a full mobile UX audit and optimization roadmap?
Riman Agency runs mobile-first design and SEO programs.
