How to Code a Simple Web App Using AI Tools in Less Than 2 Hours

You want to build a web app but dread the hours of coding? You're not alone. Many indie hackers and solo founders feel overwhelmed by the technical skills required. The good news? With the rise of AI tools in 2026, you can create a simple web app faster than ever. In this guide, I’ll walk you through the process using a mix of AI tools that can help you code your app in less than 2 hours.

Prerequisites: What You Need Before You Start

Before diving in, make sure you have the following:

• A computer with internet access
• Basic understanding of HTML, CSS, and JavaScript (no expert skills required)
• Accounts set up with the following AI tools:
  • OpenAI (for coding assistance)
  • Glitch or Replit (for hosting your app)
  • Figma (for designing your app interface)

Step 1: Define Your App Idea (15 min)

Spend some time narrowing down your app idea. It could be a simple to-do list, a budget tracker, or a blog platform. Keep it simple! The goal here is to focus on core functionality. Write down the features you want, like user input, data storage, and display.

Step 2: Design Your App Interface (20 min)

Using Figma, sketch out your app's UI. This doesn’t need to be perfect; you just need a rough idea of layout and color scheme. Figma has a free tier, which is sufficient for this project.

What Figma Does:

• Allows you to create UI designs easily
• Free tier available

Limitations:

• Collaboration features are limited in the free version.

Step 3: Generate Code with AI (30 min)

Here’s where the magic happens. Use OpenAI's Codex to generate the code for your app. You can prompt Codex with specific requests like, “Generate a simple HTML form for a to-do list.”

OpenAI Codex Pricing:

• Free tier available (limited usage)
• Paid plans start at $20/month for higher usage

Best For:

• Quickly generating code snippets

Limitations:

• May require some tweaking for perfect functionality.

Our Take:

We frequently use Codex for generating boilerplate code. It saves us tons of time, but we always double-check the output.

Step 4: Host Your App (30 min)

Use Glitch or Replit to host your app. Both platforms allow you to run your code in the cloud, making it accessible to anyone with a link.

Comparison of Hosting Tools

| Tool | Pricing | Best For | Limitations | Our Verdict | |----------|-----------------------------|------------------------------|--------------------------------------------------|----------------------------------| | Glitch | Free tier + $10/month pro | Quick app prototypes | Limited storage on free tier | Great for quick iterations | | Replit | Free tier + $20/month pro | Collaborative coding | Performance can lag with high traffic | Good for small to medium apps |

Our Take:

We prefer Glitch for its simplicity and ease of use, especially for quick prototypes.

Step 5: Testing Your App (15 min)

Once hosted, test your app thoroughly. Make sure all functionalities work as expected. Get a friend to try it out and provide feedback.

Troubleshooting:

• If the app crashes, check the console for errors.
• Common issues may involve missing dependencies or incorrect paths.

Conclusion: Start Here

In just under 2 hours, you can have a simple web app up and running using AI tools. Start by defining your app idea, design it in Figma, generate code with OpenAI Codex, and host it on Glitch.

What’s Next?

Once your app is live, consider gathering user feedback and iterating on your design. You can also explore additional features or monetization strategies.

What We Actually Use

For our projects, we rely on:

• Figma for design
• OpenAI Codex for code generation
• Glitch for hosting

These tools keep our workflow efficient and cost-effective, typically costing around $0-20/month for indie scale.