Feature Request: Add image rotation support to signed URLs (?rotate=90)

[mikesteinke]

Problem

In my app, users can rotate uploaded images (0°, 90°, 180°, 270°).

I currently store the rotation degrees in the database and apply a client-side transform so images display correctly without modifying the underlying file. This works great for in-app usage.

However, I also need to generate external documents (e.g., reports via an API). For that, I require a direct image URL where the rotation is already applied. Right now, the only way is to pre-process and upload rotated copies, which adds complexity and storage overhead.

Proposal

Support an optional query string parameter like:

https://<project>.supabase.co/storage/v1/object/sign/.../image.jpg?rotate=90

Where rotate accepts multiples of 90 degrees.

Benefits

• Zero extra storage (no duplicate rotated copies).
• Consistent handling between in-app views and external exports.
• Faster user experience (no client-side heavy image manipulation before sending to external APIs).
• Aligns with common CDN/image transformation patterns (resize, fit, format, etc.).

Example Use Case

• User uploads a receipt photo.
• In-app, I apply a transform based on the stored rotation value.
• For report generation, I call createSignedUrl and append ?rotate=90.
• The API consuming that signed URL gets the correctly oriented image directly.