Streaming native graphics using VNC

This streaming technology allows you to work with legacy applications in your browser from any device! For example, you could run a Python-powered game designed for desktop right on your mobile phone or tablet without making any changes to the underlying code.

Tetris (powered by PyGame)

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How Can I Use VNC?

Any Replit App – in any language – can use a virtual desktop. No changes are needed to execute native graphics programs on Replit. The VNC pane will appear when any application attempts to open a native desktop window.

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Securing Your Replit App

By default, your VNC connection does not have a password and can only be accessed from https://replit.com since the connection relies on the same authentication used for the WebSocket. If you need to access your Replit App via the external noVNC client, you can set a VNC password.

Set a password in your Replit App secrets configuration. Secrets is a secure place to store passwords without the fear of other users accessing your passwords. Setting VNC_PASSWORD will add enhanced security when connecting remotely.

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How Can I Use Fullscreen VNC?

You must have secured your Replit App as instructed above to proceed with these steps.

1. Execute the following command in your “Shell” tab: echo $REPL_ID

2. Construct your connection URL by replacing REPL_ID in with the output from above: <REPL_ID>.id.repl.co
3. Open the noVNC client in a separate browser tab.
4. Open connection settings.

5. Expand the WebSockets field. Enter your connection URL (<REPL_ID>.id.repl.co) in the host field, and leave the path field empty.

6. Change the Scaling Mode to Remote Resizing:

7. Use the runner username and the password configured above when asked for credentials.

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Examples

• PyGame
• Python matplotlib
• Java Processing