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.
HTML File Preview in the Browser Panel
Right-click any `.html` or `.htm` file in the file explorer and pick **Open in 1DevTool's Browser** to render it inside the built-in browser panel — ideal for previewing static sites, build artefacts, exported reports, or scratch HTML. The same context menu pair (in-app browser or your system browser) is also available for PDFs, audio, and video files.
HTTP Basic/Digest Auth in the Browser
The built-in browser panel now handles HTTP Basic and Digest authentication — a credentials prompt appears automatically when a site challenges with 401, exactly the way Chrome handles it. Cancel the prompt to inspect the 401 response directly.
Ready to boost your workflow?
Download 1DevTool for free and experience Preview HTML from the Editor along with 142 other features — all in one app.