Sizzy
What Sizzy is
Sizzy is a desktop Chromium browser for web developers, combining device testing, projects, sessions, debugging, an API client, terminals, and coding-agent sessions in one window. It runs on Linux, macOS, and Windows. Real device sizes appear side by side, with synchronized scrolling, clicks, typing, and navigation. Separate sessions keep cookies, cache, and local storage apart for different user states. The debugging panel includes Chromium DevTools, a shared console, storage and CSS editors, request headers, and an API client. Sizzy can capture device or full-page screenshots, device frames, mockups, and video or GIF recordings. Project timelines can show status from GitHub, Vercel, and Coolify, including self-hosted Coolify deployments. Coding agents use an installed Claude Code or Codex CLI with an existing sign-in or API key; provider usage may be billed separately. Plans are $15 a month monthly, $12 a month billed annually ($144 yearly), or $499 a month for Lifetime. A 14-day trial unlocks every feature without a card or automatic charge.
Who it suits
It is designed for web developers testing responsive interfaces, debugging, managing projects, and using coding agents on desktop operating systems.
What it does well
- Synchronized testing across real device sizes
- Isolated sessions separate cookies and storage
- Includes DevTools, editors, and API client
- Captures screenshots, mockups, video, and GIFs
- 14-day trial requires no credit card
What to know first
- No free plan
- Coding-provider usage may incur separate charges
- Lifetime plan is listed at $499 a month
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Monthly | Billed monthly. Cancel any time. · Every feature; macOS, Windows and Linux | $15 a month |
| Annual | Billed $144 once a year. · Every feature; macOS, Windows and Linux | $144 a year |
| Lifetime | One payment. Future updates included. · Every feature; macOS, Windows and Linux | $499, paid once |
As sizzy.co lists them, read 12 Oct 2026. The maker's own page has the final word.
Verdict
Sizzy brings responsive testing and development utilities into a Chromium desktop application. Its synchronized devices, isolated sessions, debugging tools, and capture options target developers who want these tasks together.
Facts from Sizzy's own pages
- Billing and pricing
- Signup, billing and licenses are managed through the Sizzy portal, and regional pricing is shown at checkout. · sizzy.co, 12 Oct 2026
- Browser engine
- chromium · sizzy.co, 19 Sept 2026
- Capture
- Sizzy supports screenshots of devices or full pages, device frames, mockups, and video or GIF recording. · sizzy.co, 12 Oct 2026
- Coding agents
- Agent sessions use the installed Claude Code or Codex CLI and the user’s existing sign-in or API key; separate agent-provider usage may be billed by those providers. · sizzy.co, 12 Oct 2026
- Debugging
- Its panel includes Chromium DevTools, a console across devices, storage and CSS editors, request headers and an API client. · sizzy.co, 12 Oct 2026
- Free plan
- No · sizzy.co, 19 Sept 2026
- Isolated sessions
- Each browser session has separate cookies, cache and local storage, allowing different user states to be tested at once. · sizzy.co, 12 Oct 2026
- Supported platforms
- desktop · sizzy.co, 19 Sept 2026
- Product
- Sizzy is a desktop Chromium browser made for web developers, combining projects, devices, sessions, debugging, an API client, terminals and coding agents in one window. · sizzy.co, 12 Oct 2026
- Project integrations
- Project timelines can show status from GitHub, Vercel and Coolify, including self-hosted Coolify deployments. · sizzy.co, 12 Oct 2026
- Paid from
- 12 · sizzy.co, 19 Sept 2026
- Support
- The FAQ directs users to the Help Center for documentation and says they can email support directly. · sizzy.co, 12 Oct 2026
- Synchronized device testing
- It displays real device sizes side by side and synchronizes scrolling, clicks, typing and navigation across them. · sizzy.co, 12 Oct 2026
- Trial
- The 14-day trial unlocks every feature, requires no credit card, and does not automatically charge when it ends. · sizzy.co, 12 Oct 2026
Where Sizzy stands on Freedom251
- Web browsers#146 of 154