Napkin – Build back-end functions in the browser

In plain words

Napkin is a tool that lets developers write and run back-end functions directly in their web browser. It simplifies building server-side logic without needing to set up traditional backend infrastructure. The platform is designed for developers who want to prototype or deploy functions quickly during development. What distinguishes it is the ability to handle back-end work entirely through a browser interface, reducing setup complexity.

written from the facts on this page · September 2026

From the sources

Create and deploy serverless cloud functions instantly, all from the browser. Quickly add authentication for your API, schedule tasks, and replay events. The Napkin editor has everything you need to write cloud functions at superhuman speed - code, test tools, auth, env - it's all there ready and waiting. /** * @param {NapkinRequest} req * @param {NapkinResponse} res */ export default (req, res) => { res.json({ "message" : "Hello, world!" }) } Try Example Host APIs without a Server with zero config that scales automatically Napkin functions automatically scale to handle thousands of calls a day for free. So sit back and relax while Napkin handles everything for you. Code your functions in…from napkin.io

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