Bezel — Responsive Design Tester & Mobile Device Emulator

Test responsive design on 90+ device frames, phones to foldables. Accurate touch, DPR & client-hint emulation. Free, no ads.

Bezel puts your site inside a real device, and the page believes it. This is not a resized window. Bezel renders your page inside a photorealistic device frame with a true emulation layer, so the page reports genuine touch events, the correct pixel density, and honest client hints. The real mobile bundle loads, the media queries fire the way they will on the actual device, and what you see on screen is exactly what ships. It is the most accurate way to see your responsive design on a phone, a tablet, or a foldable without keeping a drawer full of hardware on your desk. Accuracy you can trust Bezel's accuracy goes far beyond the viewport. It matches the device's screen and pixel density, its user-agent and client hints, and real touch behavior, so the page makes exactly the decisions it would on the actual hardware. High-density assets load, fine detail lands where it should, and touch and hover states behave like a real screen instead of a shrunk desktop. When Bezel shows you a layout you can trust it, and you can stop guessing whether the real device will agree. Why you need it Shipping responsive work means committing to how a page behaves on screens you often cannot hold. Bezel closes that gap. Reproduce a mobile-only bug on the exact viewport and pixel density that triggers it, confirm a media query breaks precisely where you intended, and check a foldable or tablet layout you own no hardware for. Then capture a device-framed screenshot for an app store, a landing page, or a pull request, or record a short clip or GIF of the real interaction to drop straight into your docs and release notes. It is the difference between hoping your site looks right on mobile and knowing it does. Everything you get for free Bezel is free forever, with no ads and no account. That includes more than 90 real devices spanning phones, tablets, foldables, and watches, the full accurate emulation of touch, pixel density, user-agent, and client hints, and the freedom to frame anything you can open, including localhost, staging, and pages behind a login. You also get tools to inspect and measure element size, spacing, fonts, and color contrast, an eyedropper to sample any pixel on the page, and both viewport and full-page screenshots. Nothing you test ever leaves your machine. Bezel Pro Pro is built for the people who live in this work every day. Compare several devices side by side, live and in sync, and record the framed device as WebM, MP4, or GIF. Spoof the entire environment, including geolocation, timezone, language, network conditions, and dark mode, and send custom request headers for auth tokens, feature flags, and staging gates. Add custom screen sizes for any device you need, switch on presentation mode to hand a clean, framed demo to a client, and export framed and composite images without limit. Works with any page Because Bezel lives in your browser, it frames the tab you already have open. Localhost, a private staging URL, a single-page app, or a dashboard behind a login all work instantly, with no tunnels to configure and no URLs to upload. Getting started takes three steps: click Bezel on any tab, choose a device, and watch the page reflow exactly as it would on the real thing. Private by design Bezel runs entirely on your machine. The pages you open, your screenshots and recordings, and your settings are never uploaded. The only time Bezel contacts a server is to verify a Pro licence, and that request carries nothing about you or your browsing. You can read the full policy at https://bezel.tools/privacy. One tool for every browser Bezel works across Chrome and every other Chromium browser, including Edge, Brave, Arc, Opera, and Vivaldi. Install it once and use the same tool everywhere you work. Questions or feedback are always welcome at https://bezel.tools Device names shown in Bezel are trademarks of their respective owners. Bezel is an independent tool and is not affiliated with or endorsed by them.