EverydayDevTools
CategoriesBlogFAQAboutAuthorContact
Design Tools
Popular
Recently added

Responsive Tester

Load a URL and switch between phone, tablet, and desktop presets, or set a custom viewport size.

Features

  • Device presets
  • Custom width/height
  • Iframe preview
  • One-click load

How to use Responsive Tester

  • 1
    Enter a URL and click Load.
  • 2
    Pick a device preset or custom size.

Examples

Phone preset

Input
https://example.com @ 390×844
Output
Framed preview

About Responsive Tester

Responsive Design Tester embeds a page in selectable viewports so you can smoke-check layouts quickly. Sites that disallow iframes will appear blank.

Frequently asked questions

The site likely blocks embedding via X-Frame-Options or CSP frame-ancestors.

No. Your browser loads it directly in an iframe.

Only if your browser can reach it and the page allows framing.

Related tools

HTTP & API Tools
Popular
New

Meta Tag Generator

Generate SEO and social meta tags for title, description, and Open Graph.

Open tool →
CSS Tools
Popular
New

CSS Flexbox Generator

Visually tune Flexbox properties and copy the CSS.

Open tool →
CSS Tools
Popular
New

CSS Grid Generator

Build a simple CSS Grid with columns, rows, and gap.

Open tool →