Uploading a file to a Slack channel

This workflow shows you how to post a message to a Slack channel and add a file attachment. It also shows you the general pattern for working with Binary data in n8n (any file like a PDF, Image etc).

Specifically, this workflow shows how to download a file from a URL into your workflow, and then upload it to Slack.

Video walkthrough Watch this 3 min Loom video for a walkthrough and more context on this general pattern:

[](https://www.loom.com/share/e8db4c4888f64ff584373cde5e82e2e4)