About wazero
wazero is a command line utility to run WebAssembly modules. Specifically, this runs .wasm files compiled with WASI or Go, and has zero platform dependencies.
wazero 1.12.0
wazero runs WebAssembly modules
- By Tetrate
- Open Source
- Updated May 29, 2026
What's new in 1.12.0
Hi wazero friends! The new release of wazero v1.12.0 has arrived.
This release advances us a few more steps towards Wasm 3.0!
See #2426 (comment) for where we currently stand.
Behavioral changes
- 929e400 Extended Constant Expressions (#2468) @mpoindexter
- bfb20e0 Exception handling (#2489) @evacchi
- 2c14bbf Typed references (#2497) @evacchi
- 8ee2508, a877b1b non-blocking IO on custom files (#2476, #2479) @paralin
Bug fixes
- 2bbd517 Fix fd_prestat_get integer overflow on 32-bit platforms (#2491) @hanxi
- 0bcb5f2 Ensure i32 operations are masked (#2488) @evacchi
- dafe2ca Fix error when attempting to invoke a start function imported from a host module (#2475) @mpoindexter
- f7cf169 Fix error when importing functions which were re-exported (#2463) @mpoindexter
- aa7ebad Don't use compiler when executable mmap is disabled (#2471) @anuraaga
Technical details
| Publisher | Tetrate |
|---|---|
| Version | 1.12.0 |
| Release date | 2026-05-29 |
| License | Apache-2.0 |
| Installer type | zip |
| Architecture | x64 |
| Package ID | Tetrate.wazero |
Install wazero from the command line
- Install with Windows Package Manager
winget install --id=Tetrate.wazero -e- Update to the latest version
winget upgrade --id=Tetrate.wazero -e- Uninstall
winget uninstall --id=Tetrate.wazero -e
wazero version history
- 1.11.0
- 1.9.0
- 1.8.2
- 1.6.0
- 1.0.3
- 1.0.1
Frequently asked questions
Is wazero free?
Yes. wazero is free and open-source software released under the Apache-2.0 license.
What is the latest version of wazero?
The latest version is 1.12.0, released on May 29, 2026.
Is it safe to download wazero?
The download button links to the official installer published on github.com, the same file Windows Package Manager installs. You can verify the downloaded file by comparing its SHA-256 checksum with 32342e7e6ffc6d1016ae35e9e15479ef718076f27afdad1e89bb1bb6796efeee.
Which Windows versions does wazero support?
wazero runs on Windows and is available for 64-bit (x64) systems.
How do I uninstall wazero?
Open Settings › Apps › Installed apps, find wazero and select Uninstall. From the command line, run winget uninstall --id=Tetrate.wazero -e.
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