Edge storage: KV, D1, R2 and Durable Objects

Cloudflare offers storage that Workers can use.

📖 Key ideas

Workers KV is a global key-value store, best for read-heavy data.
D1 is a serverless SQL database built on SQLite.
R2 is S3-compatible object storage with no egress fees.
Durable Objects give one strongly consistent object per id, good for chat rooms and counters.
Queues pass background jobs between Workers.

💡 Real-life example: KV is a notice board copied to every branch; D1 is the branch ledger; R2 is the storeroom for big boxes.

Workers KVGlobal key-value store

D1Serverless SQLite database

R2S3-compatible object storage

Durable ObjectSingle consistent stateful object