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Top 23 C++ WebAssembly Projects
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SSVM
WasmEdge is a lightweight, high-performance, and extensible WebAssembly runtime for cloud native, edge, and decentralized applications. It powers serverless apps, embedded functions, microservices, smart contracts, and IoT devices.
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perspective
A data visualization and analytics component, especially well-suited for large and/or streaming datasets.
Project mention: Perspective: A data visualization and analytics component for large datasets | news.ycombinator.com | 2025-07-11 -
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usearch
Fast Open-Source Search & Clustering engine Γ for Vectors & Arbitrary Objects Γ in C++, C, Python, JavaScript, Rust, Java, Objective-C, Swift, C#, GoLang, and Wolfram π
In case you are searching for fun use-cases, here's how one experiment with weird similarity metrics & kNN data-structures via Cppyy (for C++ kernel), Numba (for Python), or PeachPy (for x86 Asm), interacting with a precompiled engine: https://github.com/unum-cloud/usearch/blob/main/python/READM...
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opencv-mobile
The minimal opencv for Android, iOS, ARM Linux, Windows, Linux, MacOS, HarmonyOS, WebAssembly, watchOS, tvOS, visionOS
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OnnxStream
Lightweight inference library for ONNX files, written in C++. It can run Stable Diffusion XL 1.0 on a RPI Zero 2 (or in 298MB of RAM) but also Mistral 7B on desktops and servers. ARM, x86, WASM, RISC-V supported. Accelerated by XNNPACK.
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There are some really interesting parts around sending commands to WASM applications in there, I would encourage you to explore those yourself, along with the super interesting article by Cornelius Diekmann on porting DOOM to WASM I mentioned earlier.
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Project mention: Swift 6.2's WebAssembly Revolution: Redefining Platform Boundaries" | dev.to | 2025-07-15
# Install the Swift SDK for WASI swift sdk install https://github.com/swiftwasm/swift/releases/download/swift-wasm-6.2-RELEASE/swift-wasm-6.2-RELEASE-wasm32-unknown-wasi.artifactbundle.zip --checksum # Verify installation swift sdk list
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AlvaAR
World tracking for WebAR. A Javascript library for Augmented Reality to run SLAM in the browser.
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bergamot-translator
Cross platform C++ library focusing on optimized machine translation on the consumer-grade device.
You can use bergamot ( https://github.com/browsermt/bergamot-translator ) with Mozilla's models ( https://github.com/mozilla/firefox-translations-models ).
Not the easiest, but easy enough (requires building).
I used these two projects to build an on-device translator for Android.
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krkrsdl2
ειειSDL2γγγΈγ§γ―γ (ειει2γ¨ειειZγγγΌγΉ) / Kirikiri SDL2 Project (Based on Kirikiri 2 and Kirikiri Z)
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InfluxDB
InfluxDB β Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
C++ WebAssembly discussion
C++ WebAssembly related posts
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Swift 6.2's WebAssembly Revolution: Redefining Platform Boundaries"
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Perspective: A data visualization and analytics component for large datasets
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Sapf: New Music Language Inspired by Supercollider, APL, and Forth [video]
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DOOM...*rendered* using a single DIV and CSS! π€―π«π₯
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Ask HN: Is AG Grid worth it?
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WASM GC isn't ready for realtime graphics
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Show HN: HipScript β Run CUDA in the Browser with WebAssembly and WebGPU
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A note from our sponsor - Sevalla
sevalla.com | 1 Sep 2025
Index
What are some of the best open-source WebAssembly projects in C++? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | emscripten | 26,762 |
| 2 | SSVM | 10,075 |
| 3 | perspective | 9,408 |
| 4 | wabt | 7,511 |
| 5 | magnum | 5,027 |
| 6 | usearch | 3,063 |
| 7 | opencv-mobile | 3,013 |
| 8 | asm-dom | 2,810 |
| 9 | Diagon | 2,021 |
| 10 | OnnxStream | 1,974 |
| 11 | duckdb-wasm | 1,706 |
| 12 | wasm-fizzbuzz | 1,545 |
| 13 | swift | 1,361 |
| 14 | faasm | 909 |
| 15 | RaZ | 678 |
| 16 | N64Wasm | 645 |
| 17 | AlvaAR | 439 |
| 18 | wasmdec | 418 |
| 19 | bergamot-translator | 397 |
| 20 | krkrsdl2 | 341 |
| 21 | stockfish.wasm | 313 |
| 22 | magnum-examples | 307 |
| 23 | rlbox | 304 |
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