Free template: Slack Alert on Form Submission
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1. In n8n: Workflows -> Import from File -> n8n-slack-form.json.
2. In Slack: create a free Incoming Webhook (Slack app settings -> Incoming Webhooks).
3. Open "Notify Slack" and replace the placeholder URL with your real webhook URL.
4. Activate the workflow. n8n gives the form its own public URL -- share that link.

Checked against n8n's own workflow validator (0 errors). Not run against a live Slack webhook.
