Preview HTML from the Editor
A globe button appears in the editor toolbar when the open file is .html or .htm. One click renders it in the built-in browser panel so you can see the visual output immediately without opening a separate browser window or running a local dev server.
Screenshot coming soon
Why You Need This
How this feature boosts your daily productivity
Writing static HTML — landing pages, email templates, documentation — normally means switching to a browser, navigating to the file, and refreshing. The editor toolbar button eliminates that context switch: the preview lives in the same window as your code, separated by a panel split.
How It Works
Get started in 4 simple steps
Set Your URL
Enter your local dev server URL or set a default per project. The browser loads your app instantly.
Navigate & Test
Use back, forward, and refresh controls. Open multiple tabs for different routes or states.
Debug with DevTools
Right-click or use the keyboard shortcut to open Chrome DevTools. Inspect elements, network, and console.
Iterate Rapidly
See code changes reflected in the browser without switching windows. Your dev loop stays inside 1DevTool.
Without 1DevTool
The manual way vs. the 1DevTool way
The Hard Way
The 1DevTool Way
Key Capabilities
Everything included with Preview HTML from the Editor
Why It Matters
The productivity impact of having browser preview built into your workspace
Tighter Dev Loop
See changes instantly without alt-tabbing to Chrome. Your code, terminal, and preview live in one window.
Built-in DevTools
Full Chrome DevTools for network, console, and DOM inspection. Debug without switching apps.
Multi-Tab Preview
Preview multiple routes or states simultaneously. Compare the login page and dashboard side by side.
Per-Project URLs
Each project remembers its default preview URL. Switch projects and the browser loads the right dev server.
More in Browser Preview
Other features in this category you might find useful
Embedded Browser
Preview your local dev server with a full browser — URL bar, tabs, back/forward, and refresh controls.
DevTools Access
Open Chrome DevTools for network inspection, console debugging, and element inspection inside 1DevTool.
Live Browser Automation
Let an AI agent drive the Browser panel you already have open — same tabs, same navigation history, same signed-in sessions. Sixteen browser_* MCP tools cover navigating, clicking, typing, reading the page, and screenshotting, all scoped to one project and tab.
Comment On Web Pages And Send To AI
Drop numbered comments directly on any page in the built-in browser, then bundle them into a single AI prompt with element refs, screen position, route, and screenshots attached.
Ready to boost your workflow?
Download 1DevTool for free and experience Preview HTML from the Editor along with 170 other features — all in one app.