This is a recipe for reproducibly building a LLVM/Clang/LLD based mingw-w64 toolchain.
Benefits of a LLVM based MinGW toolchain are:
- Support for targeting ARM/ARM64 (while GCC obviously does support these architectures, it doesn't support Windows on ARM)
- A single toolchain targeting all four architectures (i686, x86_64, armv7 and arm64) instead of separate compiler binaries for each architecture
- Support for generating debug info in PDB format
- Support for Address Sanitizer and Undefined Behaviour Sanitizer
- Since LLVM 16: Support for Control Flow Guard (-mguard=cf compile and link flags)
Clang on its own can also be used as compiler in the normal GNU binutils based environments though, so the main difference lies in replacing binutils with LLVM based tools.
Publisher’s description
What is LLVM MinGW (UCRT runtime)?
LLVM MinGW (UCRT runtime) is an open-source languages & sdk program for Windows from Martin Storsjö. It is written in C.
Installation and requirements
Official installers exist for 64-bit, ARM64, 32-bit and ARM as Portable. It runs without installation (portable).
Updates and version history
The current version is 23.1.4-20261020, released on October 21, 2026. 35 versions are listed since December 3, 2024, each with links to its own installer files. That is about 19 releases a year. The last update is less than a month old.
Popularity and file types
The source code on GitHub (mstorsjo/llvm-mingw) has 3,002 stars. Similar programs include Go Programming Language, LLVM and CMake.
Project description on GitHub: “An LLVM/Clang/LLD based mingw-w64 toolchain”
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Native ARM64 build for Windows on Arm
- Portable: runs without installation
- Frequent updates (about 19 a year)
In short: LLVM MinGW (UCRT runtime) is an open-source languages & sdk tool for 64-bit, ARM64, 32-bit and ARM PCs. It is actively maintained.
Is LLVM MinGW (UCRT runtime) safe to download?
- The file is served by github.com, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
FD5462B7F5D93B2FF981FCD3F9C7E427E47F3203C64EA91C27BCC444EEBD74CD· Open the VirusTotal report for this hash - The link has not been checked yet
- 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
Security practices (OpenSSF Scorecard)
Automated checks of the mstorsjo/llvm-mingw repository on GitHub by the Open Source Security Foundation, last run on October 19, 2026.
- Actively maintained10
- No binaries in the repository10
- No dangerous workflows10
- Published packages10
- Licence declared9
- Code review0
- Restricted token permissions0
- Static code analysis0
- OpenSSF Best Practices badge0
- Fuzzing0
- Pinned dependencies0
- Branch protection0
- Security policy0
- Signed releases0
The score rates how the project is developed and released, not whether the program is safe to install. scorecard.dev
Recent versions
All 35 versions ›35 versions over 2 years · about 19 a year
| Version | Date | Size | Files |
|---|---|---|---|
| 23.1.4-20261020Latest | October 21, 2026 | — | 64-bit ZIPARM ZIPARM64 ZIP32-bit ZIP |
| 23.1.3-20261006 | October 7, 2026 | — | 32-bit ZIPARM ZIP64-bit ZIPARM64 ZIP |
| 23.1.2-20260922 | September 22, 2026 | — | ARM64 ZIP32-bit ZIP64-bit ZIPARM ZIP |
| 23.1.1-20260908 | September 8, 2026 | — | 32-bit ZIPARM64 ZIPARM ZIP64-bit ZIP |
| 23.1.0-20260826 | August 26, 2026 | — | 32-bit ZIPARM ZIPARM64 ZIP64-bit ZIP |
| 22.1.8-20260616 | June 17, 2026 | — | 32-bit ZIP64-bit ZIPARM ZIPARM64 ZIP |
| 22.1.7-20260602 | June 2, 2026 | — | 32-bit ZIPARM64 ZIPARM ZIP64-bit ZIP |
| 22.1.6-20260519 | May 19, 2026 | — | ARM ZIPARM64 ZIP64-bit ZIP32-bit ZIP |
Install from the command line
Silent install ›winget install --id MartinStorsjo.LLVM-MinGW.UCRT -eProgram files (.exe): c++.exe, clang.exe, clang-format.exe, clang-tidy.exe, clangd.exe, g++.exe, gcc.exe, ld.exe, lldb.exe
Related guide: How to use winget: install and update apps
Information
- Publisher
- Martin Storsjö
- Category
- Languages & SDKs
- Licence
- ISC
- Price
- Free
- Source code
- github.com/mstorsjo/llvm-mingw
- Written in
- C
- Requires
- Windows 11 / 10
- Architecture
- 64-bit, ARM64, 32-bit, ARM
- Installer
- Portable
- Version
- 23.1.4-20261020
- Released
- October 21, 2026
- Added to the catalogue
- December 19, 2024
- Versions listed
- 35
- Updates / year
- 18.6
- GitHub stars
- 3,002
- GitHub forks
- 274
- Website
- github.com
- winget ID
- MartinStorsjo.LLVM-MinGW.UCRT
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is LLVM MinGW (UCRT runtime) free?
Yes. LLVM MinGW (UCRT runtime) is open-source software under the ISC licence.
Is LLVM MinGW (UCRT runtime) safe to download?
The download comes from github.com, which belongs to the publisher; 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 LLVM MinGW (UCRT runtime) 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.
Does LLVM MinGW (UCRT runtime) run on ARM (Windows on Arm)?
Yes, there is a native ARM64 installer.
Where can I download an older version of LLVM MinGW (UCRT runtime)?
The versions page lists all 35 versions with links to their official installer files, back to December 3, 2024.
Can I use LLVM MinGW (UCRT runtime) without administrator rights?
Yes, it is portable: unpack and run it.
What are alternatives to LLVM MinGW (UCRT runtime)?
Go Programming Language, LLVM, CMake, Deno and Ccache. The alternatives page compares them.
