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Azure Blob Storage

Massively scalable and secure object storage for cloud-native workloads, archives, data lakes, high-performance computing, and machine learning.

Migrating your files to Azure has never been easier. Learn more.

Store and access unstructured data at scale

Azure Blob Storage helps you create data lakes for your analytics needs, and provides storage to build powerful cloud-native and mobile apps. Optimize costs with tiered storage for your long-term data, and flexibly scale up for high-performance computing and machine learning workloads.

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Scalable, durable, and available

Sixteen nines of designed durability with geo-replication and flexibility to scale as needed.


Authentication with Microsoft Entra ID (formerly Azure Active Directory) and role-based access control (RBAC), plus encryption at rest and advanced threat protection.

Optimized for data lakes

File namespace and multi-protocol access support enabling analytics workloads for data insights.

Comprehensive data management

End-to-end lifecycle management, policy-based access control, and immutable (WORM) storage.

Build powerful cloud-native applications

Blob storage is built from the ground up to support the scale, security, and availability needs of mobile, web, and cloud-native application developers. Use it as a cornerstone for serverless architectures such as Azure Functions. Blob storage supports the most popular development frameworks, including Java, .NET, Python, and Node.js, and is the only cloud storage service that offers a premium, SSD-based object storage tier for low-latency and interactive scenarios.

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Store petabytes of data, cost-effectively

With multiple storage tiers and automated lifecycle management, store massive amounts of infrequently or rarely accessed data in a cost-efficient way. Replace your tape archives with Blob storage and never worry about migrating across hardware generations.

Build powerful data lakes

Azure Data Lake Storage is a highly scalable and cost-effective data lake solution for big data analytics. It combines the power of a high-performance file system with massive scale and economy to help you speed your time to insight. Data Lake Storage extends Azure Blob Storage capabilities and is optimized for analytics workloads.

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Scale up for HPC or out for billions of IoT devices

Blob storage meets the demanding, high-throughput requirements of HPC applications while providing the scale necessary to support storage for billions of data points flowing in from IoT endpoints.

Comprehensive security and compliance, built in

  • Microsoft invests more than $1 billion annually on cybersecurity research and development.

  • We employ more than 3,500 security experts who are dedicated to data security and privacy.

  • Flexible pricing including reserved options to meet your cloud storage needs

    Choose from four storage tiers based on how often you expect to access the data. Store performance-sensitive data in Premium, frequently accessed data in Hot, infrequently accessed data in Cool and Cold, and rarely accessed data in Archive. Save significantly by reserving storage capacity.

Get started with an Azure free account


Start free. Get $200 credit to use within 30 days. While you have your credit, get free amounts of many of our most popular services, plus free amounts of 55+ other services that are always free.


After your credit, move to pay as you go to keep building with the same free services. Pay only if you use more than your free monthly amounts.


After 12 months, you'll keep getting 55+ always-free services—and still pay only for what you use beyond your free monthly amounts.

Developer resources

Learn how to use Azure Blob storage.

Trusted by companies of all sizes

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"Azure Blob Storage just works perfectly from an operational standpoint. It allows us to do some things that make our development faster and seamless. We're constantly developing applications in the test environment, which is just simple."

Mike Dunlop, President and Founder, Net-Inspect


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CarMax drives online innovation with Azure

"Azure turned out to be perfect for solving our image storage problems. Azure Storage provided effectively limitless storage with read-accessible geo-replication, so we could deliver increased capability and resilience that was cost-effective."

Brandon Linton, Solution Architect, Online Systems Platform Team, CarMax

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Frequently asked questions about Azure Blob Storage

  • A blob is a binary, large object and a storage option for any type of data that you want to store in a binary format. Learn about blob types.

  • A region is a set of datacenters deployed within a latency-defined parameter and connected through a dedicated, regional, low-latency network. Learn more.

  • You can take advantage of the Data Transfer tool in the Azure portal or compare different data transfer options.

  • Data in Azure Storage is encrypted and decrypted transparently using 256-bit AES encryption and is FIPS 140-2 compliant. Learn more about Azure Storage encryption.

  • Set your default account tier in the Azure portal. The Archive tier is available to GPv2 and Blob storage accounts and only available for individual block blobs and append blobs. Read more in the storage account overview.

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