File upload to Supabase with signed URL

# Upload files from base64 to Supabase with bucket sorting and signed URLs

This workflow automates the receipt and storage of files sent in base64 encoding, uploading them to Supabase Storage and generating secure temporary URLs. Designed to be triggered via HTTP webhook, it acts as a centralized solution for managing file storage in cloud environments.

## Who it´s for
- Developers integrating file storage into n8n workflows
- Tech leads managing data architecture in startups
- Automators who need secure file sharing via signed URLs
- Teams using Supabase as a backend for their applications

## What the automation does
- Receives file data in base64 format via HTTP webhook
- Detects the MIME type of the content (image, document, audio, etc.)
- Automatically routes the file to the appropriate bucket in Supabase Storage
- Generates a time-limited signed URL after successful upload
- Returns the URL to the client for use in downstream processes
- Can be triggered from forms, chatbots, or other workflows

## What´s included
- Ready-to-use n8n workflow
- Trigger handling logic via HTTP API
- Integration with Supabase Storage
- Base64 decoding and content type detection
- Basic text instructions for setup and adaptation

## Requirements for setup
- Supabase account with Storage enabled
- Project URL and API keys (anon/service role)
- Access to an n8n instance (cloud or self-hosted)
- Credentials for external systems that will trigger the webhook

## Benefits and outcomes
- Centralized file management in Supabase without manual intervention
- Security: API keys are not exposed to external systems
- Automatic sorting by content type (e.g., image-files, document-files, audio-files)
- Reusable across multiple projects and workflows
- Saves development time on common file upload logic
- Compatible with forms, bots, and API integrations

## Important: template only
Important: you are purchasing a ready-made automation workflow template only. Rollout into your infrastructure, connecting specific accounts and services, 1:1 setup help, custom adjustments for non-standard stacks and any consulting support are provided as a separate paid service at an individual rate. To discuss custom work or 1:1 help, contact via chat