---
title: "[Second level navigation] - Create Custom Fields"
description: Create Custom Fields
url: https://www.contentstack.com/docs/developers/create-custom-fields
product: Contentstack
doc_type: developer-hub
audience:
  - developers
version: legacy
last_updated: 2026-03-25
---

# [Second level navigation] - Create Custom Fields

This page lists resources for creating and using Custom Fields, including prebuilt and external app custom field guides. It is intended for developers extending Contentstack functionality and should be used when you need to add or integrate custom fields in content types.

### Item 1

#### Listing page

##### Heading

Create Custom Fields

##### Introduction

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

The Custom Fields extension lets you add/create custom fields that you can use in your content type.

##### Links section

###### Get started with Custom Fields

###### Heading

Get started with Custom Fields

###### Links

- [About Custom Fields](/developers/developer-hub/custom-field-location)
- [Use Prebuilt Custom Fields](/developers/developer-hub/custom-field-location)
- [Create New Custom Field](/developers/developer-hub/custom-field-location)
- [Use Custom Field in Content Types](/developers/developer-hub/custom-field-location)

###### Prebuilt Custom Field guides

###### Heading

Prebuilt Custom Field guides

###### Links

- [Ace Editor](/developers/marketplace-apps/ace-editor)
- [Color Picker](/developers/marketplace-apps/color-picker)
- [JSON Editor](/developers/marketplace-apps/json-editor)
- [Key-value Field](/developers/marketplace-apps/variables-plugin-usage-guide)
- [Progress Bar](/developers/marketplace-apps/progress-bar)
- [Star Ratings](/developers/marketplace-apps/star-ratings)

###### External Apps Custom Field guides

###### Heading

External Apps Custom Field guides

###### Links

- [Marketo Forms](/developers/marketplace-apps/marketo-forms)
- [Optimizely](/developers/marketplace-apps/optimizely)
- [YouTube](/developers/marketplace-apps/youtube)
- [Brightcove](/developers/marketplace-apps/brightcove)
- [Egnyte](/developers/marketplace-apps/egnyte)
- [Ooyala](/developers/create-custom-fields/ooyala)
- [Shopify](/developers/marketplace-apps/shopify)
- [commercetools](/developers/marketplace-apps/commercetools)
- [Eloqua](/developers/create-custom-fields/eloqua)
- [Vimeo](/developers/marketplace-apps/vimeo)
- [Cloudinary](/developers/marketplace-apps/cloudinary)
- [Adobe DAM](/developers/create-custom-fields/adobe-digital-asset-management)
- [Bynder](/developers/marketplace-apps/bynder)
- [Amazon S3](/developers/marketplace-apps/amazon-s3)
- [Brandfolder](/developers/marketplace-apps/brandfolder)
- [BigCommerce](/developers/marketplace-apps/bigcommerce)
- [JW Player](/developers/marketplace-apps/jw-player)
- [Salesforce Commerce Cloud](/developers/marketplace-apps/salesforce-commerce)

###### General Custom Field guides

###### Heading

General Custom Field guides

###### Links

- [Table](/developers/marketplace-apps/table)
- [External API Lookup](/developers/create-custom-fields/external-api-lookup)
- [CSV/XLSX](/developers/create-custom-fields/csv-xlsx)
- [Image Cropper](/developers/marketplace-apps/image-preset-builder)
- [Custom Reference Field](/developers/marketplace-apps/interstack-reference)

###### More about Custom Fields

###### Heading

More about Custom Fields

###### Links

- [Limitations of Custom Fields](/developers/developer-hub/custom-field-location)
- [Helpful links for Custom Fields](/developers/developer-hub/custom-field-location)

## Common questions

1. **Should I use Experience Extensions or the Custom Field UI location?**  
   Experience Extensions use the legacy approach with extensions. We recommend using the Custom Field UI location for the Contentstack App Framework.

2. **What can I do with the Custom Fields extension?**  
   The Custom Fields extension lets you add/create custom fields that you can use in your content type.

3. **Where can I find guides for prebuilt and external app custom fields?**  
   Use the links under “Prebuilt Custom Field guides” and “External Apps Custom Field guides” in this page.