Help center support eXpress
We've collected answers to popular questions to make eXpress easy and convenient to use. Didn't find the answer to your question? Contact our support team.
- Welcome to eXpress
- eXpress Support
- Introducing eXpress & Glossary
- Installation & Updates & Requirements
- Registering & Logging In
- User Profile
- Chats, Channels & Threads
- Contacts
- Tags & Tabs
- Files
- Working with Files
- Files Restrictions
- Files Security
- Storage of Files on the Server
- Files Troubleshooting
- Calls & Conferences
- Push Notifications & Counters
- Fixing Background Work on Mobile
- Bots & SmartApps
- Diagnostics, Logs, and Cache
- Admin Panel
Files Restrictions
File Size
Each individual file must comply with the following size limits:| User Type | File Size Limit |
|---|---|
| Corporate Lite CTS ETS
|
No more than 1 GB |
| Public RTS
|
No more than 250 MB. Before version 3.48, no more than 25 MB. |
Multimedia Files
Why Is It Sometimes Impossible to View Videos on Web/Desktop?
In web and desktop apps, video files up to 50 MB in size are displayed in the message as a video that can be viewed directly in the chat. Video files larger than 50 MB are displayed as files that require downloading before viewing in a third-party app.
The desktop app may send HEVC video as a file even at a smaller size — Why Was a Video From My Computer Sent to the Chat as a File?
What Format Should I Send Video in so It Can Be Viewed on All Devices?
Save video as MP4 with H.264 video and AAC audio. Such video plays in the chat on mobile devices and on computers, including those without a graphics card.
Other formats do not play everywhere:
| Format | Where it does not play in the chat |
|---|---|
| HEVC (H.265) | In the web and desktop apps on a computer without a graphics card that decodes HEVC — Video Plays With Sound but No Image |
| WebM | On iOS |
| MKV | On all platforms: download the file and open it in a third-party app |
Is the Quality of Sent Images Reduced?
By default, images are compressed when sent, which may slightly reduce their quality. To send an image without compression, attach it as a “document”.Is It Possible to Download Voice Messages?
This feature is not available yet.Is It Possible to Listen to Audio Files in the Chat?
No, download the audio file and listen to it in another application.Can I Send a Video Without Heavy Compression?
Yes, in the mobile app. By default, video is compressed to send faster and take up less space. To avoid this, select the video in the chat but don't send it right away: open attachment editing and switch the quality to high. Then send the video.
High-quality video is still transcoded, but it loses noticeably less detail. Keep in mind the attachment size limit that applies on your server.