cloudflare-r2

Cloudflare R2 provides S3-compatible object storage with zero egress fees. Configure credentials via Wrangler or API tokens, create a bucket, and use standard S3 SDKs pointing to R2 endpoints to store and retrieve objects without incurring data transfer charges.

Yes. R2 is S3-compatible, so you can migrate existing S3 buckets using standard S3 tools and SDKs. Configure R2 credentials, point your migration tool to R2 endpoints, and transfer objects while maintaining the same API patterns and bucket structure.

Cloudflare R2 integrates directly with Workers via Wrangler bindings. Define R2 bucket bindings in your wrangler.toml, then access buckets programmatically in Worker code using the provided runtime API to upload, download, and manage objects at the edge.

R2 supports bucket ACLs and access control via credentials. Generate presigned URLs with R2 access keys to grant temporary, time-limited access to specific objects without exposing bucket credentials, and configure CORS policies for browser-based uploads and downloads.

Minimal changes are needed. R2 is S3-compatible, so existing S3 SDKs work with R2 by changing endpoint URLs and credentials. Update your configuration to point to R2 endpoints and use R2-generated access keys; application logic remains largely unchanged.

R2 supports lifecycle rules for automatic object expiration and transitioning, bucket configuration for access patterns, and credential management through access keys and API tokens. These enable cost-efficient storage policies and fine-grained permission control aligned with your application needs.