Wasmi - WebAssembly (Wasm) Interpreter by wasmi-labs
Efficient and versatile WebAssembly interpreter for embedded systems.
About Wasmi - WebAssembly (Wasm) Interpreter
From the project's README at github.com/wasmi-labs/wasmi. Lightly cleaned for readability; for the full source see the upstream repo.
[1]: https://github.com/wasmi-labs/wasmi/actions/workflows/rust.yml/badge.svg [2]: https://github.com/wasmi-labs/wasmi/actions/workflows/rust.yml [3]: https://codecov.io/gh/wasmi-labs/wasmi/branch/main/badge.svg [4]: https://codecov.io/gh/wasmi-labs/wasmi/branch/main [5]: https://docs.rs/wasmi/badge.svg [6]: https://docs.rs/wasmi [7]: https://img.shields.io/crates/v/wasmi.svg [8]: https://crates.io/crates/wasmi
[license-mit-badge]: https://img.shields.io/badge/license-MIT-blue.svg [license-apache-badge]: https://img.shields.io/badge/license-APACHE-orange.svg
Wasmi is an efficient and lightweight WebAssembly interpreter with a focus on constrained and embedded systems. Distinct Features Simple, correct and deterministic execution of WebAssembly. Efficient and cross-platform WebAssembly runtime for embedded environments. Compiler/JIT bomb resisting translation. Loosely mirrors the Wasmtime API to act as drop-in replacement. 100% WebAssembly spec testsuite compl
Health score breakdown
6-dimension composite. See methodology for formula and weights.
Adoption signals
Real-world usage data, pulled from each registry. The bigger the numbers, the more battle-tested the project.
| Signal | Value | Source |
|---|---|---|
| GitHub stars | 2.1k | github.com/wasmi-labs/wasmi |
| GitHub forks | 350 | github.com/wasmi-labs/wasmi |
| CRATES downloads (last month) | 2708k | wasmi |
Release & maintenance
Is this project actively maintained, or about to die? Check the recency of last commit and last release.
| Project age | 8.3 years | since Jan 2018 |
| Last commit | 3 days ago | May 4, 2026 |
| Releases shipped | 86 | last: 2 months ago |
| Security policy | SECURITY.md | declared by maintainers |
Self-hosting cost across providers
Detected requirements: 4GB RAM, 40GB disk minimum. Cheapest plan per provider that meets the requirement.
| Provider | Plan | Specs | Monthly | |
|---|---|---|---|---|
| hetzner | CAX11 | 2c · 4GB · 40GB | $4.13 USD | Deploy → |
| vultr | VC2 | 1c · 1GB · 25GB | $5 USD | Deploy → |
| linode | Nanode 1GB | 1c · 1GB · 25GB | $5.12 USD | Deploy → |
| digitalocean | Basic Regular 1GB | 1c · 1GB · 25GB | $6 USD | Deploy → |
Security advisories
CVE-2025-66627. What people say on Hacker News
- Wasmi 1.0 – WebAssembly Interpreter Stable at Last
- A Snapshot of the Performance of WASM Back Ends for Managed Languages [video]
- How long does it take you to get back into a project after a few days away?
- Publishers sue Meta, claiming it violated copyrights in training AI with books
- Was this Virginia office building built with missiles in mind?
Ready to self-host Wasmi - WebAssembly (Wasm) Interpreter?
Spin up a hetzner CAX11 (4GB RAM, 40GB disk) for $4.13/mo and follow the project's official install docs.
Data last refreshed May 7, 2026.
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