> ## Documentation Index
> Fetch the complete documentation index at: https://developers.chatwoot.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Supported Features on Channels
> Comprehensive reference for supported features, message types, and limitations across all Chatwoot channels
## Supported message type
| Channel | Incoming/Outgoing message | Activity message |
| --------- | ------------------------- | ---------------- |
| Website | Yes | Yes |
| Facebook | Yes | Yes |
| Instagram | Yes | Yes |
| SMS | Yes | Yes |
| Whatsapp | Yes | Yes |
| Email | Yes | Yes |
| Telegram | Yes | Yes |
| Line | Yes | Yes |
| TikTok | Yes | Yes |
| API | Yes | Yes |
## Maximum message size (number of characters)
| Channel | Maximum message size |
| ------------------ | -------------------- |
| Website | 10,000 |
| Facebook | 2000 |
| Instagram | 1000 |
| Twilio SMS | 320 |
| Twilio WhatsApp | 1600 |
| Whatsapp Cloud | 4096 |
| 360Dialog WhatsApp | 1600 |
| Bandwidth SMS | 160 |
| Email | 25,000 |
| Telegram | 4096 |
| Line | 2000 |
| TikTok | 950 |
| API | 10,000 |
## Outbound conversation restriction
| Channel | Restriction |
| --------- | --------------------------------------------------------------------------------------------------------------- |
| Website | You can create outbound conversations to verified contacts |
| Facebook | Cannot create outbound conversations. First message should be from the contact |
| Instagram | Cannot create outbound conversations. First message should be from the contact |
| SMS | No restriction |
| Whatsapp | Cannot send any message other than Whatsapp approved template messages 24 hours after the last incoming message |
| Email | No restriction |
| Telegram | Cannot create outbound conversations. First message should be from the contact |
| Line | Cannot create outbound conversations. First message should be from the contact |
| TikTok | Cannot create outbound conversations. First message should be from the contact |
| API | No restriction |
## Outgoing message restriction
| Channel | Restriction |
| --------- | --------------------------------------------------------------------------------------------------------------- |
| Website | No restriction |
| Facebook | Cannot send promotional messages 24 hours after the last incoming message (7 days if Human agent enabled) |
| Instagram | Cannot send promotional messages 24 hours after the last incoming message (7 days if Human agent enabled) |
| Whatsapp | Cannot send any message other than Whatsapp approved template messages 24 hours after the last incoming message |
| SMS | No restriction |
| Email | No restriction |
| Telegram | No restriction |
| Line | No restriction |
| TikTok | Cannot send messages 48 hours after the last incoming message |
| API | Custom time depends on Agent reply time window |
## Outgoing message delivery status
| Channel | Sent status | Read status | Delivered status | Failed status |
| ------------------ | ----------- | ------------- | ---------------- | ------------- |
| Website | Yes | Yes | Yes | Yes |
| API | Yes | Yes | Yes | Yes |
| Official WhatsApp | Yes | Yes | Yes | Yes |
| Twilio WhatsApp | Yes | Yes | Yes | Yes |
| 360Dialog WhatsApp | Yes | Yes | Yes | Yes |
| Twilio SMS | Yes | Yes | Not supported | Yes |
| Bandwidth SMS | Yes | Yes | Not supported | Yes |
| Facebook | Yes | Yes | Yes | Yes |
| Instagram | Yes | Not supported | Yes | Yes |
| Line | Yes | Not supported | Not supported | Yes |
| Telegram | Yes | Not supported | Not supported | Yes |
| TikTok | Yes | Yes | Yes | Yes |
| Email | Yes | Not supported | Not supported | Not supported |
## Reply to message
| Channel | Reply to incoming message | Reply to outgoing message |
| --------------- | ------------------------- | ------------------------- |
| Website | Yes | Yes |
| Facebook | Yes | No |
| Instagram | Yes | No |
| SMS | No | No |
| Whatsapp Cloud | Yes | Yes |
| Twilio WhatsApp | No | No |
| Email | No | No |
| Telegram | Yes | Yes |
| Line | No | No |
| TikTok | Yes | Yes |
| API | Yes | Yes |
## Outgoing attachments supported file types
The default maximum file size limit is 40MB.
| Channel | Audio | Image | Video | Document | |
| --------------- | ------------------------------- | --------------------- | ------------------------------- | ----------------------------------- | -------- |
| Website | All | All | All | All | |
| Instagram | aac, m4a, wav, mp4 (25mb) | png, jpeg, gif (16mb) | mp4, ogg, avi, mov, web (25mb) | Not supported | |
| Facebook | aac, m4a, wav, mp4 (25mb) | png, jpeg, gif (8mb) | mp4, ogg, avi, mov, webm (25mb) | pdf, xls(x), doc(x), ppt(x) (25mb) | |
| WhatsApp Cloud | aac, amr, mp3, m4a, ogg (16mb) | png, jpeg (5mb) | 3gp, mp4 (16mb) | pdf, xls(x), doc(x), ppt(x) (100mb) | |
| WhatsApp Twilio | mpeg, opus, ogg, amr(5mb) | png, jpeg (5mb) | mp4 (5mb) | pdf (5mb) | |
| Twilio SMS | All(5mb) | png, jpeg (5mb) | All (5mb) | All (5mb) | All(5mb) |
| Email | All | All | All | All | |
| Telegram | All | All | All | All | |
| Line | Not supported | png, jpeg (10mg) | mp4 (40mb) | Not supported | |
| TikTok | Not supported | jpeg, png (3mb) | Not supported | Not supported | |
| API | All | All | All | All | |
"All" means the channel supports all standard file types listed below:
**Standard File Types**
* **Video:** `ogg`, `mp4`, `mov`, `webm`, `quicktime`, `avi`
* **Audio:** `mp3`, `mpeg`, `opus`, `ogg`, `amr`, `aac`, `m4a`, `wav`
* **Image:** `png`, `jpeg`, `gif`, `bmp`, `webp`
* **Document:** `pdf`, `doc`, `docx`, `xls`, `xlsx`, `ppt`, `pptx`, `zip`, `7z`, `rar`, `tar`, `xml`, `csv`, `json`, `rtf`, `txt`, `plain`, `.3gpp`, `x-7z-compressed`, `vnd.rar`, `x-tar`, `msword`
## Available features
| Channel | Channel greeting | Attachments | Agent Auto assignment | Slack |
| --------- | ---------------- | ----------- | --------------------- | ----- |
| Website | Yes | Yes | Yes | Yes |
| Facebook | Yes | Yes | Yes | Yes |
| Instagram | Yes | Yes | Yes | Yes |
| SMS | Yes | No | Yes | Yes |
| Whatsapp | Yes | Yes | Yes | Yes |
| Email | Yes | Yes | Yes | Yes |
| Telegram | Yes | Yes | Yes | Yes |
| Line | Yes | No | Yes | Yes |
| TikTok | Yes | Yes | Yes | Yes |
| API | Yes | Yes | Yes | Yes |
## Editor formatting support
The editor supports rich text formatting across channels. Features are dynamically enabled or disabled based on each channel's capabilities. Unsupported formats are treated as plain text.
| Channel | Bold | Italics | Strike | Code | Link | Bullet List | Ordered List | Code Block | Blockquote |
| ---------- | ---- | ------- | ------ | ---- | ---- | ----------- | ------------ | ---------- | ---------- |
| Website | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Email | Yes | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes |
| Facebook | Yes | Yes | Yes | Yes | No | Yes | Yes | Yes | No |
| Instagram | Yes | Yes | Yes | Yes | No | Yes | Yes | No | No |
| Whatsapp | Yes | Yes | Yes | Yes | No | Yes | Yes | Yes | No |
| Telegram | Yes | Yes | No | Yes | Yes | No | No | No | No |
| Line | Yes | Yes | Yes | Yes | No | No | No | Yes | No |
| TikTok | No | No | No | No | No | No | No | No | No |
| Twitter | No | No | No | No | No | No | No | No | No |
| SMS | No | No | No | No | No | No | No | No | No |
| Twilio SMS | No | No | No | No | No | No | No | No | No |
| API | Yes | Yes | No | No | No | No | No | No | No |
| Voice | No | No | No | No | No | No | No | No | No |