320–430
Mobile portrait
From iPhone SE to large Androids. Smallest popular viewport — 320px.
Responsive test
18 presets · max 4 iframes · free in-browser audit
Max 4 devices DOM audit
Urządzenia 4/4 aktywne
Canvas czeka na URL
Wybierz do 4 urządzeń, wpisz adres i kliknij Podgląd. Pełna szerokość ekranu — zoom i przewijanie dopasowują widok.
This tool patches one problem at a time
The Accessibility module in Insight does the same in every audit: Automated WCAG 2.2 tests with a fix list and an action plan.
/ About the tool
One URL. Many viewports.
DevTools shows one viewport at a time. Checking many phones and desktops means constant switching.
Pick up to 4 devices — each is an iframe. Zoom fits the preview.
The Audit button runs local heuristics: horizontal scroll, viewport meta, touch targets and tiny text.
If the site blocks iframes, preview may go through the CometWeb proxy.
/ Glossary
Common breakpoints
744–1024
Tablet
iPad Mini to iPad Pro. Two-column layouts often break here.
1280–1920
Laptop & Desktop
Laptops and FHD. Check max-width and readability.
/ FAQ
Frequently asked questions
The limit protects the audited site from a burst of parallel requests.
No — it is a fast multi-viewport overview.
We proxy when possible. Some sites still will not embed.
/ Related tools