A native Oracle Cloud (OCI) GUI for iPhone, iPad & Mac
Full S3 compatibility on Oracle Cloud Infrastructure. Universal S3 Client connects over the S3 API — browse buckets, transfer files and share presigned links, free and open source.
https://{namespace}.compat.objectstorage.{region}.oraclecloud.com
facts
Oracle Cloud (OCI) at a glance
- endpoint
- https://{namespace}.compat.objectstorage.{region}.oraclecloud.com
- auth
- Object Storage namespace · Access Key · Secret Key · Region
- regions
- Ashburn, Phoenix, Frankfurt, Zurich, Tokyo and more
- storage
- around $0.025/GB/month (Standard, 2026)
- egress
- large free monthly allowance
- Dedicated S3 compatibility endpoint
- Generous free egress allowance
- Archive tier for cold data
setup
Get your Oracle Cloud (OCI) access keys
Credentials are created in the OCI Console — here's the exact path:
- 1
Sign in to the OCI Console, open your profile menu and choose "User settings".
- 2
Under "Customer secret keys", click "Generate secret key" — this creates an S3-style access key and secret.
- 3
Find your Object Storage namespace under Governance & Administration → Tenancy details.
- 4
Add Oracle in Universal S3 Client with the namespace, region and both keys.
Console: https://cloud.oracle.com/
good to know
Before you connect
S3 credentials on OCI are called "Customer Secret Keys" — regular OCI API signing keys will not work with the S3 compatibility endpoint.
The endpoint embeds your tenancy’s Object Storage namespace, so the app asks for it explicitly.
features
What you can do with Oracle Cloud (OCI)
- Browse Oracle Cloud (OCI) buckets and folders with breadcrumbs, list or grid view, and image thumbnails.
- Upload from your photo library or files with multipart transfers and a real progress bar.
- Generate time-limited presigned URLs to share private objects with anyone.
- Preview and edit JSON, YAML, CSV and text files in place — changes save back to the bucket.
faq
Oracle Cloud (OCI) — frequently asked
+ Does OCI Object Storage work with S3 clients?
Yes — OCI exposes a dedicated S3 compatibility endpoint per region. Universal S3 Client builds it from your namespace and region: https://{namespace}.compat.objectstorage.{region}.oraclecloud.com.
+ What are Customer Secret Keys?
OCI’s name for S3-style credentials: an access key and secret generated under User settings → Customer secret keys. They are separate from OCI’s native API signing keys.
+ Where do I find my Object Storage namespace?
In the OCI Console under Tenancy details — it’s a short auto-generated string that identifies your tenancy and is part of the S3 endpoint.
+ Is there a free OCI Object Storage app for iPhone?
Universal S3 Client is free and open source, and manages OCI buckets from iPhone, iPad and Mac: browse, upload, download, rename and share via presigned URLs.
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The free Oracle Cloud (OCI) client for your pocket
Install the app, paste your Oracle Cloud (OCI) keys, and manage your buckets from anywhere.