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. Add files to your workspace to share and discuss them in Slack.

How files work in Slack

  • You can add files to Slack from your device or a file management app.
  • Files added to Slack may not exceed 1GB in size.
  • Uploaded files are searchable and shareable across your workspace.
  • Anyone in a conversation where a file was added can open the file and choose from these options:


Add files from your device

Desktop

iOS

Android

  1. Drag and drop up to 10 files into the message field, or click 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'd like. If you don’t need to include a message, you can upload the file immediately by holding the Shift key as you drag and drop it into Slack.
  3. Send the message.
  1. Open a channel or direct message (DM).
  2. To add up to 10 photos, tap the  image gallery icon. To add a file, tap the  file with clip icon to add a file already 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'd like.
  4. Tap the   paper plane icon to send.

Tip: Looking 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 10 photos, or tap the  file with clip icon to add a file already shared in Slack. To upload new photos or files, tap the mountain icon in the bottom right corner of the screen after choosing a file type. 
  3. Add a message about your file(s) if you'd like.
  4. Tap the   paper plane icon to send.

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

Note: Conversations using Slack Connect may have restricted permissions for uploading and sharing files, and certain file types cannot be added at all. If you’re unable to add files to these conversations, find an owner or admin and ask for help.

File previews

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 total. Keep in mind that 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 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.