DEV3 Free Event RSVP Page Maker — Source Code (Next.js + MongoDB)

Source code of the DEV3 Event RSVP Page Maker, a hosted event page with an RSVP form for guest counts and dietary notes, a private guest list with CSV and a standards-compliant .ics download.

Free download: sign in to any DEV3 account and click Download ZIP. Try it live: https://dev3.tech/tools/event-rsvp-page shows the finished tool running.

What is in the download

• Route handlers and pages for the Next.js App Router
• The service layer, Mongoose models and the UI components, in a dev3-tools/ folder that cannot clash with your own files
• README.md (install, environment, customise), .env.example and an MIT LICENSE

What the code does

• Time-zone aware start and end converted to UTC for the calendar file
• Guest-based capacity enforcement
• Manage page with totals, guest list and delete
• Honeypot, rate limits and abuse reporting

Tech stack

Next.js 15 (App Router), React 19, TypeScript, Mongoose on MongoDB, Tailwind CSS 4.

Install and customise

The How to install and How to use tabs list the steps. In short: copy the module into a Next.js app, install the listed packages, add the MongoDB connection string and run it.

Good to know

• This is server code: you need a MongoDB database and your own hosting.
• No emails, reminders or payments.