Life & fun · alternatives · 2026

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Hash functions from C++ running in WebAssembly launched in 2023; newer entries below may have overtaken it.

1. 1CT
   C to WebAssembly in JavaScript▲6

   2017 · maierfelix.github.io · its alternatives →

2. 2
   WebAssembly▲86

   New binary format for compiling applications for the web

   2015 · github.com · its alternatives →

3. 3
   Compiling C in the browser using WebAssembly▲174

   We’ve reached a major milestone in making any software run with WebAssembly. Thanks to the newest release of Wasmer (4.4) and the Wasmer JS SDK (0.8.0) ...

   2024 · wasmer.io · its alternatives →

4. 4
   A Fast, Malloc-Free C++14 Json Parser and Encoder▲98

   Meta programming utilities for C++14. Merged in matt-42/lithium - matt-42/iod

   2014 · github.com · its alternatives →

5. 5
   Compile-time HTML parsing in C++14▲175

   A C++ HTML template engine that uses compile time HTML parsing - rep-movsd/see-phit

   2017 · github.com · its alternatives →

6. 6
   A hash array-mapped trie implementation in C▲171

   Long-simmering side project that is finally ready to see the light. HAMTs are a cool persistent data structure and implementing one has been a lot of fun. Beyond the code, there is likely some value in the extensive and largely complete implementation docs; basic benchmarks are linked in the README, too. Kind of aiming to be "the libavl for HAMTs". That is obviously a high and aspirational bar but a distinct possibility if it stirs up a little interest and/or contribution. Anyways, it's time for this to go out, collect feedback and maybe even some use outside of toy projects. Let me…

   2023 · github.com · its alternatives →

7. 7
   I wrote a WebAssembly Interpreter and Toolkit in C▲105

   Web49: WebAssembly Interpeter. Contribute to FastVM/Web49 development by creating an account on GitHub.

   2023 · github.com · its alternatives →

8. 8
   Execute JavaScript in a WebAssembly QuickJS sandbox▲206

   This TypeScript package allows you to safely execute JavaScript code within a WebAssembly sandbox using the QuickJS engine. Perfect for isolating and running untrusted code securely, it leverages the lightweight and fast QuickJS engine compiled to WebAssembly, providing a robust environment for code execution. Features - *Security*: Run untrusted JavaScript code in a safe, isolated environment. - *File System*: Can mount a virtual file system - *Custom Node Modules*: Custom node modules are mountable - *Fetch Client*: Can provide a fetch client to make http(s) calls - *Test-Runner*: Includes…

   2024 · github.com · its alternatives →

9. 9
   A portable hash map in C▲176

   A small, portable, linear probing hash map. Contribute to e-dant/salmagundi development by creating an account on GitHub.

   2024 · github.com · its alternatives →

10. 10
    HASH▲127

    Build complex simulations quickly with modular components

    2020 · hash.ai · its alternatives →

11. 11
    I built a small browser engine from scratch in C++▲146

    Hi HN! Korean high school senior here, about to start CS in college. I built a browser engine from scratch in C++ to understand how browsers work. First time using C++, 8 weeks of development, lots of debugging—but it works! Features: - HTML parsing with error correction - CSS cascade and inheritance - Block/inline layout engine - Async image loading + caching - Link navigation + history Hardest parts: - String parsing(html, css) - Rendering - Image Caching & Layout Reflowing What I learned (beyond code): - Systematic debugging is crucial - Ship with known bugs rather than chase…

    Jan 2026 · github.com · its alternatives →

12. 12AS
    Accelerating SHA256 by 100x in Golang on ARM▲156

    2016 · blog.minio.io · its alternatives →

13. 13
    How to compile C/C++ for WASM, pure Clang, no libs, no framework▲217

    A little help for programmers, who wants to run C/C++ code in the browser. (This is my second attempt to show it, first time I got banned bcoz of my personal page domain, I don't really understand it why is is suspicious.)

    2022 · github.com · its alternatives →

14. 14
    Rain hashes – well designed, simple and fast variable sized hashes▲79

    The fastest 128-bit and 256-bit hash, passes all tests, and under 140 source lines of code. API library and CLI tool in C++ and NodeJS/Wasm - DOSAYGO-STUDIO/rain

    2024 · github.com · its alternatives →

15. 15
    I built a web-ready synthesizer using WebAssembly and C++▲6

    2020 · youtu.be · its alternatives →

16. 16
    I made a C program to create a vanity SHA-1 hash for a text file▲58

    2025 · gist.github.com · its alternatives →

17. 17SC
    SHA1 Checksum Large Files with HTML5 Typed Arrays and Web Workers▲47

    2011 · antimatter15.github.com · its alternatives →

18. 18CM
    Calculate MD5, SHA-1 in your browser using HTML5 and WebWorkers▲19

    2011 · browserhash.com · its alternatives →

19. 19
    Simple Hash Table Implementation for C▲42

    Simple hash table implementation for C. Contribute to watmough/jwHash development by creating an account on GitHub.

    2015 · github.com · its alternatives →

20. 20
    StaticJSON: fast, direct and static typed parsing of JSON with C++▲18

    Fast, direct and static typed parsing of JSON with C++ - netheril96/StaticJSON

    2016 · github.com · its alternatives →

21. 21
    A concurrent thread-safe hash map implemented in C++▲17

    A concurrent thread-safe hash map implemented in C++ - kshk123/hashMap

    2017 · github.com · its alternatives →

22. 22
    Rain Hashes▲18

    The fastest 128-bit and 256-bit hash, passes all tests, and under 140 source lines of code. API library and CLI tool in C++ and NodeJS/Wasm - DOSAYGO-STUDIO/rain

    2023 · github.com · its alternatives →

23. 23WW
    Wasienv – WebAssembly WASI Development Toolchain for C/C++▲8

    2019 · medium.com · its alternatives →

24. 24WC
    WebAssembly Cloud – I created a playground in the browser using Rust▲5

    2021 · webassembly.cloud · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →