Get your keys
- In the Backblaze web console, go to Application Keys.
- Click Add a New Application Key. Scope it to one bucket or all buckets.
- Copy the keyID and applicationKey. The applicationKey is shown only once.
The master application key does not work with the S3 compatible API. If your login is rejected, this is the first thing to check: create a regular application key instead.
Connect
- Add a new connection and choose the Backblaze B2 preset.
- Paste the keyID as the access key and the applicationKey as the secret.
- Enter your endpoint region (visible on the bucket list page, for example
us-west-004). Connect.
Endpoint
Your S3 endpoint is shown in the Backblaze console next to each bucket, in the form:
| Field | Example |
|---|---|
| Endpoint | https://s3.us-west-004.backblazeb2.com |
| Region | us-west-004 |
All your buckets in an account cluster share the same endpoint.
Good to know
- Buckets created before Backblaze added S3 compatibility (May 2020) are not reachable over the S3 API. Recreate them or use a newer bucket.
- Application keys scoped to a single bucket cannot list all buckets; the app handles this by letting you type the bucket name directly in the connection.
- B2 file versions map to S3 object versions, so the app’s version browser works: old versions are listable and restorable.