---
title: "[Second level navigation] - Create Sidebar Extensions"
description: Create Sidebar Extensions
url: https://www.contentstack.com/docs/developers/create-sidebar-extensions
product: Contentstack
doc_type: developer-guide
audience:
  - developers
version: legacy
last_updated: 2026-03-25
---

# [Second level navigation] - Create Sidebar Extensions

This page introduces Sidebar Extensions, including a note about the legacy Experience Extensions approach, and provides navigation links to related guides and example Sidebar Extensions for developers who want to extend app functionality within a stack.

### Item 1

#### Listing page

##### Heading

Create Sidebar Extensions

##### Introduction

**Note**: Experience Extensions use the legacy approach with extensions. We recommend using the  [Sidebar UI Location](/docs/developers/developer-hub/sidebar-location/) for the Contentstack App Framework to extend the functionality of your apps.

Sidebar Extensions let you integrate powerful functionalities into your stack that let you analyze your entry content and recommend ideas.

##### Links section

###### Get Started with Sidebar Extensions

###### Heading

Get Started with Sidebar Extensions

###### Links

- About Sidebar Extensions  
  **Title**: About Sidebar Extensions  
  **Url**: /developers/developer-hub/sidebar-location

- Use Prebuilt Sidebar Extensions  
  **Title**: Use Prebuilt Sidebar Extensions  
  **Url**: /developers/developer-hub/sidebar-location

- Create a New Sidebar Extension  
  **Title**: Create a New Sidebar Extension  
  **Url**: /developers/developer-hub/sidebar-location

- Use Sidebar Extensions in Entries  
  **Title**: Use Sidebar Extensions in Entries  
  **Url**: /developers/developer-hub/sidebar-location

###### Sidebar Extension Guide for External Apps

###### Heading

Sidebar Extension Guide for External Apps

###### Links

- MonkeyLearn  
  **Title**: MonkeyLearn  
  **Url**: /developers/marketplace-apps/monkeylearn

- Google Analytics  
  **Title**: Google Analytics  
  **Url**: /developers/marketplace-apps/google-analytics/

- Optimizely Experiments  
  **Title**: Optimizely Experiments  
  **Url**: /developers/marketplace-apps/optimizely

- IBM Watson  
  **Title**: IBM Watson  
  **Url**: /developers/create-sidebar-extensions/ibm-watson

- Salesforce Einstein  
  **Title**: Salesforce Einstein  
  **Url**: /developers/create-sidebar-extensions/salesforce-einstein

- Social Sharing  
  **Title**: Social Sharing  
  **Url**: /developers/create-sidebar-extensions/social-sharing

- Gatsby Preview  
  **Title**: Gatsby Preview  
  **Url**: /developers/create-sidebar-extensions/gatsby-preview

- Developer Tools  
  **Title**: Developer Tools  
  **Url**: /developers/marketplace-apps/developer-tools

###### More about Sidebar Extensions

###### Heading

More about Sidebar Extensions

###### Links

- Limitations of Sidebar Extensions  
  **Title**: Limitations of Sidebar Extensions  
  **Url**: /developers/developer-hub/sidebar-location

- Helpful Links for Custom Sidebar Extensions  
  **Title**: Helpful Links for Custom Sidebar Extensions  
  **Url**: /developers/developer-hub/sidebar-location

## Common questions

**Q: Are Sidebar Extensions the recommended approach for new development?**  
A: **Note**: Experience Extensions use the legacy approach with extensions. We recommend using the  [Sidebar UI Location](/docs/developers/developer-hub/sidebar-location/) for the Contentstack App Framework to extend the functionality of your apps.

**Q: What can Sidebar Extensions be used for?**  
A: Sidebar Extensions let you integrate powerful functionalities into your stack that let you analyze your entry content and recommend ideas.

**Q: Where can I find guides or examples for external apps using Sidebar Extensions?**  
A: See the “Sidebar Extension Guide for External Apps” links such as MonkeyLearn, Google Analytics, Optimizely Experiments, IBM Watson, Salesforce Einstein, Social Sharing, Gatsby Preview, and Developer Tools.