Uploading a File to a Slack Channel

The workflow JSON

Copy or download the full n8n JSON below. Paste it into a new n8n workflow, add your credentials, activate. Full import guide →

{
  "nodes": [
    {
      "name": "On clicking 'execute'",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        160,
        300
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "name": "Download the file",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        420,
        300
      ],
      "parameters": {
        "url": "https://n8n.io/_nuxt/img/sync-data-between-apps.a4be8c7.png",
        "options": {},
        "responseFormat": "file"
      },
      "typeVersion": 1
    },
    {
      "name": "Post to Slack",
      "type": "n8n-nodes-base.slack",
      "position": [
        640,
        300
      ],
      "parameters": {
        "options": {
          "channelIds": [
            "C02GP22NHJ6"
          ],
          "initialComment": "This is the file"
        },
        "resource": "file",
        "binaryData": true,
        "authentication": "oAuth2"
      },
      "credentials": {
        "slackOAuth2Api": {
          "name": "<your credential>"
        }
      },
      "typeVersion": 1
    }
  ],
  "connections": {
    "Download the file": {
      "main": [
        [
          {
            "node": "Post to Slack",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "On clicking 'execute'": {
      "main": [
        [
          {
            "node": "Download the file",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}

Credentials you'll need

Each integration node will prompt for credentials when you import. We strip credential IDs before publishing — you'll add your own.

• slackOAuth2Api

About this workflow

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).

Source: https://n8n.io/workflows/1570/ — original creator credit. Request a take-down →

More Slack & Telegram workflows → · Browse all categories →

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