Have you ever needed a specific tool for your workflow but didn’t have the technical knowledge to build it?
That was exactly my situation. I needed a Chrome extension to organize my digital assets, but I had never built a Chrome extension before .
Yet, I managed to create a fully functional Chrome extension in approximately 60 minutes with AI .
And it is now Published on the Chrome Store .
The total cost? Just $3 in API usage.
In this guide, I’ll walk you through exactly how I used AI to build “ My Assets ” – a Chrome extension that helps content creators organize and access frequently used digital assets.
I’ll share the development process, explain the Chrome extension structure, provide code examples ( plus the full code ) and give you insights to help you build your own chrome extensions faster than you thought possible.
As someone who regularly creates content across multiple platforms, I found myself constantly switching between tabs and tools to grab:
Links I reference frequently
Brand colors I use in my designs
Images I include in my content
Emojis I add to my posts
This constant context-switching was disrupting my flow and wasting valuable time.
I needed a centralized tool that would:
Store my frequently used links with descriptions
Save my brand colors for easy access
Organize images I use regularly
Keep my favorite emojis handy
Work offline and respect my privacy by storing everything locally
A Chrome extension seemed like the perfect solution – I just had no idea how to build one !
Before diving into how I built my extension, let’s understand the basic structure of a Chrome extension. This knowledge will help you make sense of the code examples later in this guide.
A typical Chrome extension consists of:
manifest.json : The configuration file that defines the extension’s permissions, entry points, and metadata.
Popup Interface : HTML, CSS, and JavaScript files for the user interface that appears when you click the extension icon.
Background Scripts : (Optional) JavaScript that runs in the background to handle events.
Content Scripts : (Optional) JavaScript that runs in the context of web pages.
Icons : Various sizes of icons for the extension.
Here’s a basic folder structure for a Chrome extension:
For simple extensions like the one I built, you might not need background or content scripts, focusing mainly on the popup interface and core functionality.
My setup was minimal:
Cline extension for VSCode (for AI assistance)
Anthropic API (for Claude access through Cline)
That’s it. No Chrome extension development courses, no tutorials, no boilerplate code!
After failing in my first attempt when I tried to tackle the entire project at once ( which resulted in AI hallucinations ), I learned an important lesson: break complex projects into tiny, manageable chunks .
Here’s the step-by-step process I followed:
I started by asking Claude about the basic structure of a Chrome extension.
It explained that I needed:
A manifest.json file defining the extension’s configuration
HTML, CSS, and JavaScript files for the user interface
Icon files in various sizes
Claude helped me create a proper manifest file that defines the extension’s permissions and entry points:
This uses Manifest V3 (the latest standard) and requests only the necessary permissions:
storage : For saving assets locally
activeTab : For accessing the current page when saving links
clipboardWrite : For copy functionality
downloads : For downloading saved images
For the user interface, I wanted a clean, tab-based layout that would separate different asset types:
Claude generated the entire HTML structure based on my description of what I wanted each tab to contain, creating a simple but effective interface.
I got something like this:
I implemented each feature one by one, starting with the most important – link management:
Here’s a snippet showing how the link saving feature works:
Gets the current active tab
Creates a link object with URL, title, favicon, and user-provided description and tags
Retrieves existing links from Chrome’s local storage
Adds the new link to the array
Saves the updated array back to storage
Next, I implemented color management:
For managing images:
I also added an emoji management tab with categorization and favorites functionality.
You can get the full code of the extension here if you wanna play with 👇
My workflow with Claude through Cline was remarkably efficient:
Request a specific feature implementation : “Implement the link saving functionality”
Review the generated code : Claude would provide a complete implementation
Ask for clarification or adjustments : “Can you modify this to include tags?”
What impressed me most was that the code worked correctly on the first try in nearly every case.
I rarely had to make manual adjustments.
This development process taught me several valuable insights:
When I tried to develop the entire extension at once, the AI struggled and hallucinated. By breaking it into smaller components (manifest file, UI design, individual features), I got much better results.
The more specific my requirements, the better the output. Vague requests led to generic solutions. When I clearly defined what I wanted (like “implement a function to save the current tab as a link with these specific properties”), Claude delivered precise code.
Building feature by feature allowed me to test each component thoroughly before moving on, which maintained a high quality throughout the project.
Tools like this make software development more accessible to people without specialized knowledge in every framework or platform. You don’t need to be a Chrome extension expert to build a Chrome extension anymore.
The entire development process cost me just $3 in Anthropic API usage. Compare that to:
The time it would have taken to learn Chrome extension development from scratch
The cost of hiring a developer
The opportunity cost of not having this tool
My experience building this Chrome extension demonstrates that with the right approach and tools, you can create useful software even in areas where you have no prior experience.
Start with a clear problem you want to solve
Break it down into manageable parts
Use AI as your development partner
Test and iterate quickly
Don’t let a lack of experience in a specific technology stop you from building tools that could save you time and make you more productive.
With AI assistance, the barrier to entry for software development is lower than ever before.
I hope this guide inspires you to tackle your own development projects, even if they’re in areas where you have little experience.
Remember, sometimes the best way to learn is by doing.
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