A bundle of two IIS compression scheme providers iisbrotli.dll and iiszlib.dll that enable IIS to compress HTTP response contents. iisbrotli.dll supports Brotli compression, while iiszlib.dll supports both Gzip and Deflate compression.
Publisher’s description
What is Microsoft IIS Compression?
Microsoft IIS Compression is an open-source program for Windows from Microsoft Corporation. It is written in C++.
Installation and requirements
Official installers exist for 64-bit and 32-bit as MSI. The main installer is 1.4 MB. Installation asks for administrator rights. The installer supports unattended (silent) installation. An MSI package is available for deployment with Group Policy, Intune or Configuration Manager.
Popularity and file types
The Chocolatey package has been downloaded 1,397 times. The source code on GitHub (microsoft/IIS.Compression) has 91 stars.
Project description on GitHub: “Compression schemes for Microsoft IIS”
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- MSI package for managed deployment
- Documented silent install
- Small download (1.4 MB)
Cons
- No native ARM64 build
- Installation needs administrator rights
- No update for more than a year
In short: Microsoft IIS Compression is an open-source Windows tool for 64-bit and 32-bit PCs. Updates have slowed down. Administrators can deploy it unattended.
Is Microsoft IIS Compression safe to download?
- The file is served by download.microsoft.com; check that it is the publisher’s official mirror
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
7FC023308C81397D733493DDFBE256B8352A97E8893E5749D812F59C8B7D004B· Open the VirusTotal report for this hash - The link answered when we last checked it (October 22, 2026)
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 1 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 1.0.06502Latest | March 10, 2022 | 1.4 MB | 64-bit MSI32-bit MSI |
Install from the command line
Silent install ›winget install --id Microsoft.IIS.Compression -echoco install iis-compression -ymsiexec /i iiscompression_amd64.msi /qn /norestartmsiexec /x {BBA81C6C-1E1C-4724-AB4A-CD80980C396F} /qn /norestartRelated guide: How to use winget: install and update apps
Information
- Publisher
- Microsoft Corporation
- Licence
- MIT
- Price
- Free
- Source code
- github.com/microsoft/IIS.Compression
- Written in
- C++
- Requires
- Windows 11 / 10
- Architecture
- 64-bit, 32-bit
- Installer
- MSI
- Version
- 1.0.06502
- Released
- March 10, 2022
- Added to the catalogue
- April 16, 2026
- Versions listed
- 1
- Chocolatey downloads
- 1,397
- GitHub stars
- 91
- GitHub forks
- 19
- Website
- github.com
- winget ID
- Microsoft.IIS.Compression
- Chocolatey package
- iis-compression
- MSI product code
- {BBA81C6C-1E1C-4724-AB4A-CD80980C396F}
Ratings and reviews
No reviews yet. Be the first to rate it.
Frequently asked questions
Is Microsoft IIS Compression free?
Yes. Microsoft IIS Compression is open-source software under the MIT licence.
Is Microsoft IIS Compression safe to download?
The download comes from download.microsoft.com; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install Microsoft IIS Compression with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Can Microsoft IIS Compression be installed silently?
Yes. The silent install page lists the exact command for each installer, including msiexec for the MSI package.
Does Microsoft IIS Compression run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 64-bit and 32-bit version through emulation.
