"for OS X, Linux, and Windows (and it's free)"
"Microsoft Azure Storage Explorer (Preview) is a standalone app from Microsoft that allows you to easily work with Azure Storage data. The Preview release currently supports Azure Blobs only. Tables, queues, and files are coming soon."Releases · Azure/deco (older open source version)
old tool: Azure Storage Explorer - Home (2014, C# WPF)
"Azure Storage Explorer is not actively maintained and only receives updates about once a year.
You may want to consider Microsoft's Azure Storage Explorer (a different tool)