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What is Next.js?

Next.js is a React framework for building full-stack web applications. You use React Components to build user interfaces, and Next.js for additional features and optimizations.

Prerequisites

Before you begin, you’ll need to have a Formbox form. If you don’t have one yet, you can create a new form by following the steps in the Introduction guide. Once you have your form, make a note of the form’s endpoint url in the setup tab of your form page, as you’ll need it later.

Creating a new Next project

To get up and running quickly, we will follow the official Next installation guide to create a new Next project. In your terminal, run the following command:
On installation, you’ll see the following prompts: Make sure to select Yes for Tailwind CSS and App Router.
After the prompts, create-next-app will create a folder with your project name and install the required dependencies. Go to the new directory for the new website:
Start the development server:
Open your browser and navigate to http://localhost:3000. You should see a new Next application running.

Adding your Formbox form to your Next project

Now that we have a new Next project set up, let’s add our Formbox form to it. For styling purposes, we’ll use Tailwind CSS. You can learn how to add Tailwind CSS to your project by following the Next installation guide. When running create-next-app, we selected Yes for Tailwind CSS, so it should already be set up in your project. If not, you can add it by following the guide linked above. Once you have Tailwind CSS set up, let’s add our form. Open up the page.tsx file within the root of the app directory and replace everything in the file with the following code block:
page.tsx
Paste the form endpoint url you copied from Formbox into your form’s action attribute as shown in the code block above. Save the file and navigate to http://localhost:3000 in your browser. You should see a form that you can fill out and submit.
And that’s it! Now after filling out and submitting the form you should see the default submission success page displayed.
Last modified on April 8, 2026