Show HN: Cppbolt – A lightweight C++ to WebAssembly compiler written in Rust
1 comments
- Points3
- Comments4
–Rank now
#23Peak rank
1Days on list
67Score · 7d
Nov 5, 2026First seen
Rank · 7 days
On Hacker News
Hey HN! I've been working on cppbolt, a lightweight C++ to WebAssembly compiler written in Rust. The idea was to build something that can compile and run C++ directly in the browser without downloading a massive LLVM/Clang toolchain. Unlike projects that bundle LLVM/Clang and can require 100+ MB of compiler assets, cppbolt's compiler payload is around 1 MB. It compiles a supported subset of C++17 directly to standard WebAssembly binaries. Some things it supports: - Classes, inheritance,…
- Points
- 3
- Comments
- 4
- Submitted by
- ajtimepyro
- Posted
- Nov 4, 2026
- Site
- github.com
Story details from Hacker News ↗ · linked article on github.com.
Trending history
Show HN: Cppbolt – A lightweight C++ to WebAssembly compiler written in Rust was first seen on Hacker News · Show HN on Nov 5, 2026. Since then it has appeared in 27 checks on 1 different day. Its best position was #23 of 30, reached on Nov 5, 03:30 UTC. It dropped off the list after Nov 5, 16:20 UTC.
Rank history
Position on Hacker News · Show HN at every check (lower is better).
Last 14 days
Best rank per day (UTC).
23
Oct 26today
Metric history
Platform metric as reported by Hacker News.
From the discussion
A few top-level comments from Hacker News, shortened. Read the full thread on Hacker News.
WebAssembly really is the future of cross-platform apps. With so many existing C++ projects and optimized code, being able to convert them is highly useful. Just curious, have you tried to open a cpp project and use a tool like Claude to just convert it to WebAssembly and compare? That would make a great data point…
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Show HN 1 day, best #23
Questions
Is Show HN: Cppbolt – A lightweight C++ to WebAssembly compiler written in Rust trending on Show HN right now?
Not at the moment. It was last on the list on Nov 5, 16:20 UTC, after 1 day of trending.
What is the highest rank Show HN: Cppbolt – A lightweight C++ to WebAssembly compiler written in Rust reached?
#23 on Hacker News · Show HN, on Nov 5, 03:30 UTC. Trendoday checks this list every 30 minutes.
How long has Show HN: Cppbolt – A lightweight C++ to WebAssembly compiler written in Rust been trending?
It was first seen on Nov 5, 2026 and has been on the list on 1 day (27 checks) since.
How much discussion did it get on Hacker News?
3 points and 4 comments; submitted by ajtimepyro on Nov 4, 2026.