# Supabase Storage GUI client for Mac, iPhone, and Web

> A Supabase Storage GUI that downloads and moves whole folders. Supabase storage pricing, upload limits, the S3 endpoint, and RLS error fixes.

Canonical: https://www.bucketmate.app/s3-client/supabase-storage

Supabase Storage has an S3-compatible API. BucketMate uses it so you can manage Supabase buckets next to AWS S3, R2, and MinIO.

Best for: Supabase apps that store user uploads

## Supabase Storage at a glance (checked October 2026)

- **Included**: 100 GB - on Pro and Team. Free has 1 GB
- **Overage**: $0.0213/GB - per month on Pro and Team
- **Max upload**: 500 GB - on Pro. Free is 50 MB
- **Egress**: 250 GB - uncached on Pro, then $0.09/GB
- Pricing: https://supabase.com/pricing

## Supabase Storage console vs BucketMate

| Task | Console | BucketMate |
| --- | --- | --- |
| Download | Single files only | Download folders or the whole bucket |
| Move or rename a folder | Not supported. Supabase suggests the AWS CLI | Rename and drag folders |
| Many projects | Switch project to switch storage | Every project's buckets in one window |

## Made for Supabase Storage

- **S3 keys skip RLS**: S3 access keys have full access to every bucket. Keep them on your own machine, where BucketMate stores them.
- **Public and private**: Copy direct URLs for public buckets, and presigned links for private ones.
- **Every project in one place**: Add each Supabase project as a connection and group them in workspaces next to AWS S3 and R2.

## Common errors

- `new row violates row-level security policy`: Your app uploads with RLS and has no SELECT policy next to INSERT. Fix: Add a SELECT policy on storage.objects. BucketMate's S3 keys aren't affected.
- `EntityTooLarge`: The file is bigger than the project's upload limit. Fix: Raise the global limit in Storage settings. Free stops at 50 MB.
- `SignatureDoesNotMatch`: Wrong secret or wrong region. Fix: Copy the region and endpoint from Storage settings.

## Endpoint

`https://<project-ref>.storage.supabase.co/storage/v1/s3`

Copy the endpoint and region from Storage settings in Supabase.


## Connect in BucketMate

An S3 access key and secret from Supabase Storage settings.

1. Enable S3 access in Supabase Storage settings and create an access key.
2. In BucketMate, choose Add connection and select Supabase Storage.
3. Enter the S3 endpoint, keys, and project region, then Test Connection.

On iPhone, Supabase Storage has its own option in the Provider picker.

## S3 compatibility notes

- **No versioning**: Supabase S3 has no versioning, ACLs, or tagging.
- **No bucket config**: Bucket CORS, lifecycle, and encryption aren't available via S3.
- **Use the storage host**: Endpoints use <project-ref>.storage.supabase.co.

## FAQ

### How much storage does Supabase include?

Free includes 1 GB and Pro includes 100 GB, then $0.0213 per GB. Max upload size is 50 MB on Free and up to 500 GB on Pro.

### Can I download a whole folder from Supabase Storage?

The dashboard downloads single files. BucketMate downloads folders and whole buckets over the S3 API.

### How do I move a folder in Supabase Storage?

Supabase has no folder move. Its docs suggest the AWS CLI. In BucketMate, drag the folder or rename it.

### What is the Supabase Storage S3 endpoint?

https://<project-ref>.storage.supabase.co/storage/v1/s3, with the region shown in Storage settings.

### Do S3 keys respect RLS policies?

No. Supabase S3 access keys bypass RLS and see every bucket, so keep them private.

## Links

- Docs: https://docs.bucketmate.app/macos/providers/connect-supabase-storage.md
- Download: https://www.bucketmate.app/download
- Web app: https://web.bucketmate.app/
- All providers: https://www.bucketmate.app/s3-client.md