# Embed Overlay Checkout with the Checkout JavaScript SDK

The Freemius Checkout JavaScript SDK is a front-end library that enables embedding the [Freemius Overlay Checkout](https://freemius.com/help/help/documentation/checkout/.md) into your web applications.

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[](/help/videos/freemius-checkout-advanced-simple-pricing-page.mp4)

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Freemius provides a CDN-hosted version of the SDK for quick integration; alternatively, you can install it via package managers such as npm or Yarn for modern development workflows.

The sections below include integration and usage examples.

* [Installation Guide](https://freemius.com/help/help/documentation/saas-sdk/checkout-js-sdk/installation/.md) - Get started with the Freemius Checkout JS SDK by learning how to include it in your project.
* [Usage Guide](https://freemius.com/help/help/documentation/saas-sdk/checkout-js-sdk/usage/.md) - Learn how to utilize the features of the Checkout JS SDK to create a seamless checkout experience.

## Contributing[​](#contributing "Direct link to Contributing")

This project is open source, and we welcome contributions. See the [contribution guide](https://github.com/Freemius/freemius-checkout-js/blob/main/CONTRIBUTING.md).