Upload & Categorize Files with Supabase Storage & Secure URLs

This n8n workflow streamlines file management by accepting file inputs (MIME type, filename, base64 data) from other workflows or triggers. It intelligently routes files to dedicated Supabase Storage buckets—image-files, audio-files, video-files, or document-files—based on MIME type detection, ensuring organized storage without manual intervention.

Leveraging Supabase's REST API, it uploads files securely and generates signed URLs with a 30-day expiration for safe, temporary access. Error handling and structured responses make it reliable for production use. Ideal for self-hosted Supabase setups, it saves hours of custom coding for file handling in apps.

Benefits include automated categorization reducing storage clutter, enhanced security via expiring URLs, and seamless integration into larger pipelines like AI processing or content management systems. Use cases: Ingesting user uploads in web apps, archiving media from forms/emails, or preprocessing files for ML models in no-code environments.