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Backend in the Browser.

Build production-ready API endpoints. No infra. No boilerplate. Just code.

https://sandbox.npkn.net
Code
Python 3.8
Sample Sandbox Code

Write. Run. Deploy.

Code with confidence while Napkin handles the annoying bits.

Simple

Zero configuration required.

Secure

Automatic HTTPS.
Private by default.

Scalable

Your backend is guaranteed to grow without interruption.

Runnable

Run and view your code response immediately.

Debuggable

Test, lint, and view code errors right in the browser.

In Sync

Your code is automatically saved and backed up in the cloud.