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Cloud Storage is compatible with some other object storage platforms so you can seamlessly integrate data from different sources. This page describes Cloud Storage tools you can use to manage your cross-platform object data.
XML APIThe Cloud Storage XML API is interoperable with some tools and libraries that work with services such as Amazon Simple Storage Service (Amazon S3). To use these tools and libraries with Cloud Storage, change the request endpoint that the tool or library uses to the Cloud Storage URI https://storage.googleapis.com, and then configure the tool or library to use your Cloud Storage HMAC keys. See Simple migration from Amazon Simple Storage Service (Amazon S3) for detailed instructions on getting started.
The V4 signing process lets you make signed header requests to the Cloud Storage XML API. After creating a signature using the V4 signing process, you include the signature in the Authorization header of a subsequent request, which provides authentication. You can create a signature using an RSA signature or your Amazon S3 workflow and HMAC credentials. For more details about authenticating requests, see Signatures.
The gcloud CLI is the preferred command line tool for accessing Cloud Storage. It also lets you access and work with other cloud storage services that use HMAC authentication, like Amazon S3. After you add your Amazon S3 credentials to ~/.aws/credentials, you can start using gcloud storage commands to manage objects in your Amazon S3 buckets. For example:
The following command lists the objects in the Amazon S3 bucket my-aws-bucket:
gcloud storage ls s3://my-aws-bucket
The following command synchronizes data between an Amazon S3 bucket and a Cloud Storage bucket:
gcloud storage rsync s3://my-aws-bucket gs://example-bucket --delete-unmatched-destination-objects --recursive
For more information, including details on how to optimize this synchronization, see the gcloud storage rsync documentation.
If you attempt to use the gcloud CLI to access an Amazon S3 bucket that contains a dot in its name, you might receive an invalid certificate error. This is because Amazon S3 does not support virtual-hosted bucket URLs with dots in their name. When working with Amazon S3 resources, you can configure the gcloud CLI to attempt to use path-style bucket URLs by setting the storage/s3_endpoint_url property to be the following:
storage/s3_endpoint_url https://s3.REGION_CODE.amazonaws.com
Where REGION_CODE is the region containing the bucket you are requesting. For example, us-east-2.
You can modify the storage/s3_endpoint_url property in one of the following ways:
Using the gcloud config set command, which applies the property to all gcloud CLI commands.
Creating a named configuration and applying it on a per-command basis using the --configuration project-wide flag.
Storage Transfer Service lets you import large amounts of online data into Cloud Storage from Amazon S3 buckets, Microsoft Azure Blob Storage containers, and general HTTP/HTTPS locations. Storage Transfer Service can be used to schedule recurring transfers, delete source objects, and select which objects are transferred.
Additionally, if you use Amazon S3 Event Notifications, you can set up Storage Transfer Service event-driven transfers to listen for such notifications and automatically keep a Cloud Storage bucket in sync with a Amazon S3 source.
What's nextAmazon Simple Storage Service™ and Amazon S3™ are trademarks of Amazon.com, Inc. or its affiliates in the United States and/or other countries.
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-08-07 UTC.
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