Live Web Preview
Debugging
Also known as:web app preview,in-IDE browser,live rendering
Renders a locally hosted web application within the IDE, allowing developers to view and interact with the app's UI without leaving the coding environment.
Agent Support
| Agent | Support Level | Notes | Actions |
|---|---|---|---|
| Cursor | ✅ Full Support | Cursor 2.0 (November 2025) introduced an integrated browser panel that renders the running web application live inside the editor, enabling side-by-side coding and visual testing without leaving Cursor. | |
| Devin | ✅ Full Support | Devin can start web application servers in its sandbox and take screenshots or interact with the running app via its cloud browser. Users can observe what Devin sees in the session dashboard. | |
| Devin Desktop | ✅ Full Support | Previews let you view your web app locally inside the Devin Desktop IDE or in the browser. | |
| OpenAI Codex | ✅ Full Support | The ChatGPT desktop app has a built-in browser: start your dev server, open the local route, and review the rendered page alongside the code diff. | |
| Replit Agent | ✅ Full Support | Replit provides a built-in web preview panel that renders the running application in real time. Changes made by Replit Agent are reflected immediately in the web preview, allowing developers to see results without leaving the Replit IDE. | |
| Cline | ⚠️ Partial | Cline can use a browser to browse the web as part of a task; an embedded preview panel inside the editor is not documented. | |
| Gemini CLI | ⚠️ Partial | An experimental browser agent (disabled by default, requires Chrome 144+) can navigate pages, click buttons, and extract information. It drives Chrome rather than showing a preview inside an editor. | |
| Google Antigravity | ⚠️ Partial | The browser agent can open, read, and actuate a local Chrome browser to test development websites, capture screenshots, and record actions. This runs in Chrome rather than as a preview panel inside the editor. | |
| Aider | ❌ No Support | Aider has no built-in web preview. It is a CLI coding tool with no browser or UI rendering capabilities. | |
| Claude Code | ❌ No Support | No information on live web preview has been found | |
| GitHub Copilot | ❌ No Support | GitHub Copilot does not include an integrated web preview feature. It focuses on code suggestions within the IDE and doesn't render or preview web applications. | |
| Google Jules | ❌ No Support | Jules operates in a cloud code execution environment. It can run tests and build steps, but does not provide a live web preview of running applications. | |
| Zed AI | ❌ No Support | Zed does not include a built-in web preview panel. Web applications must be previewed in an external browser. | |
| Kiro | ❓ Unknown | Not documented: the full official documentation (https://kiro.dev/llms.txt) was searched on 2026-09-30 without finding this capability. This does not mean the tool lacks it. Dev server support runs long-running processes but no in-editor preview is described. | |
| OpenCode | ❓ Unknown | Not documented: the full official documentation (https://opencode.ai/docs/) was searched on 2026-09-30 without finding this capability. This does not mean the tool lacks it. |
Frequently Asked Questions
How do I open a live web preview in the IDE?▼
To open a live web preview, start your local development server (e.g., 'npm run dev') and use the IDE’s preview feature to open the app in a new tab or panel.
Can I interact with the web app in the preview?▼
Yes, you can interact with the web app in the preview, such as clicking buttons or filling forms, just as you would in a browser.
Does the preview support all web technologies?▼
The preview supports most standard web technologies, but compatibility may vary based on the IDE’s rendering engine and the specific technologies used in the app.
How does the preview handle authentication?▼
Authentication in the preview typically works as it would in a browser, but you may need to log in separately if the preview doesn’t share sessions with your system browser.
Can I debug the web app within the preview?▼
Debugging capabilities in the preview may be limited compared to a full browser’s DevTools, but some IDEs offer integrated debugging tools for the preview.
Is the preview available for all programming languages?▼
The preview is primarily designed for web applications, so it supports languages and frameworks that run in a browser, such as JavaScript, HTML, and CSS.
How does the preview handle local storage and cookies?▼
Local storage and cookies are typically managed within the preview’s isolated environment, similar to a browser tab, but may not persist across sessions.
Can I share the preview with others?▼
Sharing the preview directly may not be supported, but you can share the locally hosted app’s URL if it’s accessible on the network.
Does the preview work with HTTPS?▼
The preview can work with HTTPS if the local server is configured to use HTTPS, but you may need to handle certificate warnings or trust the local certificate.
How do I configure the preview settings?▼
Preview settings can usually be configured in the IDE’s preferences or settings panel, where you can adjust options like the default browser or preview behavior.
Related Features
Console Error Integration
Captures JavaScript console errors from the live web preview and sends them to the AI for analysis, debugging, or automated code fixes.
DebuggingInteractive Element Selection
Allows selecting specific UI elements from a rendered web application and sending them to the AI for context-aware code generation or modification.
DebuggingAutomatic Context Awareness
The capability of an AI coding agent to automatically detect and incorporate relevant context, such as open files, project structure, or custom instructions, without manual intervention.
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