The developer tool for responsive design testing. Enter any website URL and instantly preview how it renders across desktop, tablet, and mobile viewports — side by side.
Works with any website — test any URL instantly
From a single URL to a full multi-viewport report — Devicely shows you exactly how your site looks on every screen.
Paste any public URL and see a live rendering of the page across multiple device viewports simultaneously — no install, no setup.
See desktop, tablet, and mobile renderings simultaneously in one view. Spot layout breaks and overflow issues at a glance.
Choose from presets mapped to real devices — iPhone, Galaxy, iPad, MacBook. Test at the exact resolution your users see.
React, Next.js, Vue, Astro, WordPress — if it has a URL, Devicely can preview it.
Switch between portrait and landscape modes to verify your layout handles rotation correctly.
No account, no install, no config. Open the tool, paste your URL, and start testing immediately.
Enter any public website URL into the tool — your live site, a staging environment, or any URL you want to inspect.
Select from preset device sizes — iPhone, Galaxy, iPad, MacBook — or set a fully custom width and height.
All selected viewports render together so you can immediately spot layout breaks, overflows, or misaligned elements.
Test your site across the full range of devices your users actually own — from compact phones to ultrawide monitors. Preset sizes map to real-world hardware so you're always testing at accurate dimensions.
Paste any URL to run a Lighthouse audit and see Performance, Accessibility, SEO, and Best Practices scores for both mobile and desktop.
Powered by Google PageSpeed Insights API · Results may vary based on server load and network conditions
Paste your URL and see exactly how your site looks on mobile, tablet, and desktop — instantly, for free.