The Azure Cosmos emulator provides a local environment that emulates the Azure Cosmos DB service for development purposes.
The Azure Cosmos DB emulator provides a local environment that emulates the Azure Cosmos DB service designed for development purposes. Using the emulator, you can develop and test your application locally, without creating an Azure subscription or incurring any service costs. When you're satisfied with how your application is working with the emulator, you can transition to using an Azure Cosmos DB account with minimal friction.
| Publisher | Microsoft® Corporation |
|---|---|
| Author | Microsoft Corporation |
| Version | 2.14.28 |
| Release date | 2026-08-07 |
| License | Proprietary |
| Installer type | wix |
| Architecture | x64 |
| Package ID | Microsoft.Azure.CosmosEmulator |
winget install --id=Microsoft.Azure.CosmosEmulator -ewinget upgrade --id=Microsoft.Azure.CosmosEmulator -ewinget uninstall --id=Microsoft.Azure.CosmosEmulator -emsiexec /i "azure-cosmosdb-emulator-2.14.28-f3a3a45b.msi" /quiet /norestartAzure Cosmos DB Emulator is proprietary software from Microsoft® Corporation. Check the publisher's license terms for pricing and usage rights.
The latest version is 2.14.28, released on Aug 7, 2026.
The download button links to the official installer published on cdbemulator-dmhwaeevbhd3e9f8.b02.azurefd.net, the same file Windows Package Manager installs. You can verify the downloaded file by comparing its SHA-256 checksum with afbdd73aaa7dc3d3933fc7b970b22285f91fed40eefd9e3c8ed137c2f1b30f4c.
Azure Cosmos DB Emulator runs on Windows and is available for 64-bit (x64) systems.
Run the offline installer with msiexec /i "azure-cosmosdb-emulator-2.14.28-f3a3a45b.msi" /quiet /norestart, or install it with Windows Package Manager: winget install --id=Microsoft.Azure.CosmosEmulator -e --silent.
Open Settings › Apps › Installed apps, find Azure Cosmos DB Emulator and select Uninstall. From the command line, run winget uninstall --id=Microsoft.Azure.CosmosEmulator -e.
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