# Build That Extension

> Discover 9500+ expired Chrome extensions with 500+ users each.

Discover 9500+ expired Chrome extensions with 500+ users each. Download the full dataset and build your next extension idea with proven demand.

## Facts
- Website: https://www.buildthatextension.com
- Categories: SaaS
- LotsDirectory page: https://lots.directory/products/build-that-extension
- Listing state: Unclaimed. We listed this product from its public website, and its owner has not claimed it yet.

## Detailed info

## What is Build That Extension?

Build That Extension is a market research database for developers and indie hackers. It provides a dataset of over 9,500 expired Chrome extensions that each had over 500 active users.

## What Build That Extension does

Build That Extension provides a CSV dataset of Chrome extensions that were removed when Google moved from Manifest V2 to Manifest V3. Each row includes extension names, Chrome Store links, detailed descriptions, user counts, and original ratings. Developers use the dataset to discover ideas with proven market demand.

## Who Build That Extension is for

It is built for developers and indie hackers looking for validated Chrome extension concepts and market demand data.

## How Build That Extension works

Users download the CSV dataset to find abandoned extensions with proven user bases and rebuild them.

## Key features

- Database of more than 9,500 expired Chrome extensions available as a CSV download
- User counts with 500+ real users proving market demand
- Extensions removed when Google updated from Manifest V2 to Manifest V3
- Records containing original Chrome Store URLs, descriptions, and user ratings
- Original ratings, reviews, and abandonment timeline data
- Instant dataset download providing lifetime access to extension records

## Facts from buildthatextension.com, checked 15 October 2026

Written from Build That Extension's own website ([Homepage](https://www.buildthatextension.com/)). The maker can claim this listing to edit it.

## FAQ

### Why were the extensions removed from the Chrome store?
Google updated extension requirements from Manifest V2 to Manifest V3, and extensions that did not update were removed from the store.

### What information is included in the CSV dataset?
The CSV includes extension names, Chrome Store links, descriptions, user counts of 500+ users, ratings, and reviews.

### How many extensions are cataloged in Build That Extension?
The database covers 9,500+ expired Chrome extensions.

### Who is Build That Extension designed for?
The platform is designed for developers and indie hackers seeking validated product ideas with proven historical user bases.

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Source: https://lots.directory/products/build-that-extension · Machine-readable context by LotsDirectory.