Add files to Slack

When you work with your team in Slack, you may need to collaborate on files that you’ve created in other services from time to time. You can add files to your workspace to share and discuss them in Slack.

How files work in Slack

Note: Files added to Slack may not exceed 1 GB in size.


Add files from your device

Desktop

iOS

Android

  1. Drag and drop up to ten files into the message field in Slack, or click on the   paper clip icon next to the message field and choose where to add a file from.
  2. Include a message about the file(s) if you like.
  3. Send the message.

Tip: If you don’t need to include a message with your file, you can upload it immediately by holding the Shift key as you drag and drop it into Slack.

  1. Open a channel or direct message (DM).
  2. To add up to ten photos, tap the  image gallery icon. To add a file, tap the  file with clip icon to add a file that has already been shared in Slack, then tap  Add a file to upload a file from your device.
  3. Add a message about your file(s) if you like.
  4. Tap the   paper plane icon to send.

Tip: Want to add a file to a thread? Tap the thread to open it, tap the blue arrow then tap the   file with clip icon.

  1. Open a channel or direct message (DM).
  2. Tap the  image gallery icon to add up to ten photos, or tap the  file with clip icon to add a file that has already been shared in Slack. To upload new photos or files, tap the mountain icon in the bottom-right corner of the screen after you choose a file type. 
  3. Add a message about your file(s) if you like.
  4. Tap the   paper plane icon to send.

In conversations, Slack will include a preview of the file as part of your message. If it's an image file, the preview will display inline as long as it's smaller than 11,000 pixels on the longest side or less than 45 million pixels in total.

Note: Microsoft Office files that are larger than 50 MB will not display a preview.


Add files from Box, Dropbox, Google Drive or OneDrive

Once a file management app has been added to your workspace, you can add files to Slack by clicking on the   paper clip icon to the right of the message field, then selecting your preferred app. Visit an article below to get started:

Note: Files added from a file management tool will not be stored in Slack, but you can still search for and share them from your workspace.