DEV3 Free Appointment Booking Page Maker — Source Code (Next.js + MongoDB)

Source code of the DEV3 Appointment Booking Page Maker, a Next.js module for hosted booking pages: weekly hours, services and slot lengths, time-zone-safe slot generation and one booking per slot, in MongoDB.

Free download: sign in to any DEV3 account and click Download ZIP. Try it live: https://dev3.tech/tools/appointment-booking-page-maker 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

• Slot generation from opening hours in any time zone
• Double-booking prevention on the server
• Public booking page and token-protected manage page
• Booking export and report/abuse model

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 payments, reminders or calendar sync are included.