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Developing your Extension

In every extension Replit App, you will see a button labeled Extension Devtools in the top-right corner of the workspace.
Devtools button
If you do not see this button, make sure your Replit App is configured to be an Extension.

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Developer Tools

The Extension Devtools pane makes it easy to edit your Extension’s metadata and manage Tools and File Handlers.
Devtools

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Extension Metadata

Click the Edit button in the top-right corner of your Extension preview to edit it. See docs on the manifest file.
Extension preview

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File Handlers

Click the ”+” Icon next to File Handlers or click New File Handler. You will then be prompted to fill out the necessary information for the file handler. See Type Definition. To preview a file handler in action, click the Open button on the right side of an existing file handler.

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Tools

Click the ”+” Icon next to Tools or click New Tool. You will then be prompted to fill out the necessary information for the new tool. See Type Definition. To preview a tool in action, click the Open button on the right side of an existing tool.