> ## Documentation Index
> Fetch the complete documentation index at: https://www.cometchat.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Extensions

> Enable CometChat iOS UI Kit extensions for stickers, polls, collaboration tools, reactions, moderation, smart replies, and link previews.

| Field           | Value                                                          |
| --------------- | -------------------------------------------------------------- |
| Dashboard setup | CometChat Dashboard → Extensions                               |
| Activation      | Enable in dashboard, features appear automatically in UI Kit   |
| Code required   | None — extensions work out of the box                          |
| Platforms       | Works across iOS, Android, and Web with the same configuration |

Extensions add powerful features to your chat app without writing any code. Simply enable them in your [CometChat Dashboard](https://app.cometchat.com), and they automatically appear in the UI Kit components.

## How Extensions Work

1. Log in to your [CometChat Dashboard](https://app.cometchat.com)
2. Navigate to the **Extensions** section
3. Enable the extensions you want
4. The features automatically appear in your app after initialization

<Note>
  Extensions are enabled at the dashboard level. Once activated, they work across all platforms (iOS, Android, Web) using the same CometChat app.
</Note>

## Composer Extensions

These extensions add new options to the [Message Composer](/ui-kit/ios/message-composer) attachment menu or action sheet.

### Stickers

Let users express emotions with fun, pre-designed stickers.

<Frame>
  <img src="https://mintcdn.com/cometchat-22654f5b/Xbd1mrZiWe1Pd3HE/images/8d6e960d-stickers-7942a0da9cbc29036f79d55676f8bca4.png?fit=max&auto=format&n=Xbd1mrZiWe1Pd3HE&q=85&s=012d6542c0399e9241d73523f68a57ef" width="1440" height="833" data-path="images/8d6e960d-stickers-7942a0da9cbc29036f79d55676f8bca4.png" />
</Frame>

| Component                                        | Setup Guide                                 |
| ------------------------------------------------ | ------------------------------------------- |
| [Message Composer](/ui-kit/ios/message-composer) | [Sticker Extension](/fundamentals/stickers) |

### Polls

Create polls to gather opinions in group chats quickly.

<Frame>
  <img src="https://mintcdn.com/cometchat-22654f5b/_oiGBuX1qG3S8Eo5/images/63897180-polls-916d9d0221d8d325a1bd3c80bcfdb70f.png?fit=max&auto=format&n=_oiGBuX1qG3S8Eo5&q=85&s=54722b6068fd5906ac4b466c9ecab94a" width="1440" height="833" data-path="images/63897180-polls-916d9d0221d8d325a1bd3c80bcfdb70f.png" />
</Frame>

| Component                                        | Setup Guide                            |
| ------------------------------------------------ | -------------------------------------- |
| [Message Composer](/ui-kit/ios/message-composer) | [Polls Extension](/fundamentals/polls) |

### Collaborative Whiteboard

Real-time whiteboard for drawing, brainstorming, and sharing ideas together.

<Frame>
  <img src="https://mintcdn.com/cometchat-22654f5b/LKT8U_07JOWQgTZK/images/0d8981b7-collaborative-whiteboard-5a8803d8e98749ed39851a34721ff094.png?fit=max&auto=format&n=LKT8U_07JOWQgTZK&q=85&s=7259b50c105e3e61463bb36abf6ee799" width="1440" height="833" data-path="images/0d8981b7-collaborative-whiteboard-5a8803d8e98749ed39851a34721ff094.png" />
</Frame>

| Component                                        | Setup Guide                                                        |
| ------------------------------------------------ | ------------------------------------------------------------------ |
| [Message Composer](/ui-kit/ios/message-composer) | [Collaborative Whiteboard](/fundamentals/collaborative-whiteboard) |

### Collaborative Document

Work together on shared documents in real-time with other users.

<Frame>
  <img src="https://mintcdn.com/cometchat-22654f5b/aledzZZMtw_sXx4U/images/fb87a1db-collaborative-document-5e6df9a4ae2e74a9e7631df74b7971e4.png?fit=max&auto=format&n=aledzZZMtw_sXx4U&q=85&s=4fcfd009242cb1fd0142f797801c7f01" width="1440" height="833" data-path="images/fb87a1db-collaborative-document-5e6df9a4ae2e74a9e7631df74b7971e4.png" />
</Frame>

| Component                                        | Setup Guide                                                    |
| ------------------------------------------------ | -------------------------------------------------------------- |
| [Message Composer](/ui-kit/ios/message-composer) | [Collaborative Document](/fundamentals/collaborative-document) |

### Smart Replies

AI-powered suggested responses for faster, more efficient conversations.

| Component                                        | Setup Guide                                  |
| ------------------------------------------------ | -------------------------------------------- |
| [Message Composer](/ui-kit/ios/message-composer) | [Smart Replies](/fundamentals/smart-replies) |

## Message List Extensions

These extensions enhance messages displayed in the [Message List](/ui-kit/ios/message-list).

### Message Reactions

Let users react to messages with a range of emojis for quick responses.

<Frame>
  <img src="https://mintcdn.com/cometchat-22654f5b/czi9y0KbDwCW-4OY/images/6ee460cf-extension_message_reactions_screens-5aa0ea266fef6fdadadef80d0a707d62.png?fit=max&auto=format&n=czi9y0KbDwCW-4OY&q=85&s=c804624ea5c1d94ffc35cf5fc1ee9855" width="4948" height="3120" data-path="images/6ee460cf-extension_message_reactions_screens-5aa0ea266fef6fdadadef80d0a707d62.png" />
</Frame>

| Component                                | Setup Guide                                    |
| ---------------------------------------- | ---------------------------------------------- |
| [Message List](/ui-kit/ios/message-list) | [Reactions Extension](/fundamentals/reactions) |

### Message Translation

Translate messages into any language instantly, eliminating language barriers.

<Frame>
  <img src="https://mintcdn.com/cometchat-22654f5b/GrDbzzq1LLfv-sgw/images/83dae8d1-translation-1e7ffc5b3c9f25a7a670485e9ca7e78e.png?fit=max&auto=format&n=GrDbzzq1LLfv-sgw&q=85&s=d15c99125f5ceb19a3731aac32e29324" width="1440" height="833" data-path="images/83dae8d1-translation-1e7ffc5b3c9f25a7a670485e9ca7e78e.png" />
</Frame>

| Component                                | Setup Guide                                              |
| ---------------------------------------- | -------------------------------------------------------- |
| [Message List](/ui-kit/ios/message-list) | [Message Translation](/fundamentals/message-translation) |

### Link Preview

Show rich previews for URLs shared in chat including title, description, and thumbnail.

<Frame>
  <img src="https://mintcdn.com/cometchat-22654f5b/lqGH-Bgiq2mgS9m9/images/bcbe2f2a-link-preview-a2bd03dce69ae5765847418b88ed849b.png?fit=max&auto=format&n=lqGH-Bgiq2mgS9m9&q=85&s=8691a5c4f718f2ef4780086ffe409e45" width="1440" height="833" data-path="images/bcbe2f2a-link-preview-a2bd03dce69ae5765847418b88ed849b.png" />
</Frame>

| Component                                | Setup Guide                                |
| ---------------------------------------- | ------------------------------------------ |
| [Message List](/ui-kit/ios/message-list) | [Link Preview](/fundamentals/link-preview) |

### Thumbnail Generation

Automatically create smaller preview images for faster loading and reduced bandwidth.

<Frame>
  <img src="https://mintcdn.com/cometchat-22654f5b/CrArf1QwUPg5EvCC/images/29a4e7bb-thumbnail-96a3bb74abb716add7c27c0de539540c.png?fit=max&auto=format&n=CrArf1QwUPg5EvCC&q=85&s=64fb3b3989db2071e0481ddf0f88506c" width="1440" height="833" data-path="images/29a4e7bb-thumbnail-96a3bb74abb716add7c27c0de539540c.png" />
</Frame>

| Component                                | Setup Guide                                                |
| ---------------------------------------- | ---------------------------------------------------------- |
| [Message List](/ui-kit/ios/message-list) | [Thumbnail Generation](/fundamentals/thumbnail-generation) |

## Moderation Extensions

These extensions help maintain a safe chat environment by filtering content automatically.

### Profanity Filter

Automatically censor inappropriate and obscene words in messages.

<Frame>
  <img src="https://mintcdn.com/cometchat-22654f5b/lqGH-Bgiq2mgS9m9/images/bed902e7-extension_profanity_filter_screens-15b99ab8c5a88b7dee28904ce087e4df.png?fit=max&auto=format&n=lqGH-Bgiq2mgS9m9&q=85&s=5bab448153d4451109c0c48e3b314404" width="4948" height="3120" data-path="images/bed902e7-extension_profanity_filter_screens-15b99ab8c5a88b7dee28904ce087e4df.png" />
</Frame>

| Component                                | Setup Guide                                                                                    |
| ---------------------------------------- | ---------------------------------------------------------------------------------------------- |
| [Message List](/ui-kit/ios/message-list) | [Legacy Extensions](https://assets.cometchat.io/legacy-docs/moderation/legacy-extensions.html) |

### Data Masking

Automatically mask sensitive data like credit card numbers and phone numbers.

<Frame>
  <img src="https://mintcdn.com/cometchat-22654f5b/8YlylzCf9CehSaWO/images/cb60706e-extension_data_masking_screens-3c5363e1989e7e26cd7a3985590e84a4.png?fit=max&auto=format&n=8YlylzCf9CehSaWO&q=85&s=32c3ae82c30cc0fd32510cdfb07516e1" width="4948" height="3120" data-path="images/cb60706e-extension_data_masking_screens-3c5363e1989e7e26cd7a3985590e84a4.png" />
</Frame>

| Component                                | Setup Guide                                                                                    |
| ---------------------------------------- | ---------------------------------------------------------------------------------------------- |
| [Message List](/ui-kit/ios/message-list) | [Legacy Extensions](https://assets.cometchat.io/legacy-docs/moderation/legacy-extensions.html) |

### Image Moderation

Detect and filter inappropriate or explicit images using AI/ML.

<Frame>
  <img src="https://mintcdn.com/cometchat-22654f5b/L67V-UjCgqzL1qxp/images/72d11e6d-extension_image_moderation_screens-34da779e11f0d81d2cc6004273ca2d25.png?fit=max&auto=format&n=L67V-UjCgqzL1qxp&q=85&s=203c5e1071be9a1f9e47589046551a24" width="4948" height="3122" data-path="images/72d11e6d-extension_image_moderation_screens-34da779e11f0d81d2cc6004273ca2d25.png" />
</Frame>

| Component                                | Setup Guide                                                                                    |
| ---------------------------------------- | ---------------------------------------------------------------------------------------------- |
| [Message List](/ui-kit/ios/message-list) | [Legacy Extensions](https://assets.cometchat.io/legacy-docs/moderation/legacy-extensions.html) |

## Extensions Summary

| Extension        | Category     | Component        | Use Case               |
| ---------------- | ------------ | ---------------- | ---------------------- |
| Stickers         | Composer     | Message Composer | Fun expression         |
| Polls            | Composer     | Message Composer | Group decisions        |
| Whiteboard       | Composer     | Message Composer | Visual collaboration   |
| Document         | Composer     | Message Composer | Document collaboration |
| Smart Replies    | Composer     | Message Composer | Quick responses        |
| Reactions        | Message List | Message List     | Quick responses        |
| Translation      | Message List | Message List     | Multi-language support |
| Link Preview     | Message List | Message List     | Rich URL previews      |
| Thumbnails       | Message List | Message List     | Faster loading         |
| Profanity Filter | Moderation   | Message List     | Content moderation     |
| Data Masking     | Moderation   | Message List     | Privacy protection     |
| Image Moderation | Moderation   | Message List     | Safe content           |

## Next Steps

* [Extensions Overview](/fundamentals/extensions-overview) — Full extension documentation
* [Moderation](/moderation/overview) — Content moderation features
* [Message Composer](/ui-kit/ios/message-composer) — Where composer extensions appear
* [Message List](/ui-kit/ios/message-list) — Where message extensions appear