Sizzy

How is Sizzy different from Chrome DevTools device mode?

DevTools emulates one viewport at a time inside a debugging panel. Sizzy shows every device side by side in one window, with synchronized scrolling, clicking, and typing across all of them. You fix a breakpoint once and instantly see the result everywhere - no switching presets, no resizing, no guessing.

Responsively is free and open source. Why pay for Sizzy?

Responsively is a solid free tool, and if side-by-side previews are all you need, it may be enough. Sizzy goes further: more accurate device simulation with frames and user agents, synchronized interactions and forms, multiple isolated sessions for testing auth states, project workspaces, Photo Studio for marketing screenshots, and active full-time maintenance since 2018. The 14-day trial is the easiest way to feel the difference.

How does Sizzy compare to Polypane?

Both are paid browsers built for developers, and both are good. Polypane leans into accessibility audits and meta previews. Sizzy focuses on fast multi-device workflows: synced sessions, device frames, screenshot tooling, throttling, and a workspace that remembers your projects. Most developers try both trials and keep the one that fits how they work - we're confident enough in Sizzy to recommend exactly that.

Do my Chrome extensions work in Sizzy?

Yes. Sizzy is built on Chromium, so React DevTools, password managers, ad blockers, and the rest of your extensions install and work the way you expect.

Which platforms does Sizzy support?

Sizzy runs on macOS, Windows, and Linux. One license covers your day-to-day development machine setup.

How does the free trial work?

Create an account on portal.sizzy.co and you get 14 days of full access - every feature unlocked, no credit card required. When the trial ends you simply pick a plan; you'll never be charged automatically because we never asked for a card.

Is there a way to avoid a subscription?

Yes. Besides monthly ($15/mo) and annual ($12/mo billed yearly) plans, there's a one-time $499 lifetime license that includes every future update and is immune to price changes.