Safe Rust
Every crate in the workspace sets forbid(unsafe_code): the engine, the CLI and the WebAssembly bindings.
Safe Rust · JavaScript engine
QuickJSOxide
An embeddable JavaScript engine for Rust applications, written in safe Rust. Zero lines of unsafe, from the parser to the garbage collector.
OXIDE · FRACTAL LAB
Computing
0%engine 0.00 s0 iterations
Computed by quickjs-oxide WASM. The browser host draws.
Build info
- engine
- loading…
- commit
- …
- engine load
- …
- view
- whole set, −0.75 + 0i, width 3.3
- image
- …
- host
- Web Worker + canvas
Why oxide
QuickJS-class speed
Register bytecode, inline caches and NaN-boxed values keep run time level with QuickJS on the V8 v7, Octane and Are-We-Fast-Yet suites.
Runs where you need it
Embed it in a Rust application, use the native qjs command line, or ship the WebAssembly build to the browser, like the demo above.
By the numbers
Measured against QuickJS 2026-06-04, the engine quickjs-oxide follows. Method and raw results are in the docs.
97.46%
Test262 pass rate
81,441 of 83,562 variants in the scope QuickJS runs.
≈1×
QuickJS speed
Geometric mean of run time relative to QuickJS. Lower is faster.
V8 v7 0.94×Octane 1.15×AWFY 0.99×
0
Lines of unsafe
The compiler rejects unsafe in every crate of the workspace.
0
Dependencies
No third-party crates, except num-bigint for BigInt. The native host adds tz-rs for time zones.
Release builds on one Linux machine. See the method and every result →
Start here
Add the two crates, create a runtime, evaluate a script and read the result.
[dependencies]
quickjs-oxide = { git = "https://github.com/pocket-nexus/quickjs-oxide" }
quickjs-oxide-host = { git = "https://github.com/pocket-nexus/quickjs-oxide" }
use quickjs_oxide::engine::api::core::{Runtime, Value};
use quickjs_oxide_host::SystemHost;
fn main() -> Result<(), Box<dyn std::error::Error>> {
let runtime = Runtime::new_with_host_services(SystemHost::default());
let mut context = runtime.new_context()?;
let value = context.eval("[1, 2, 3].map((x) => x * 2).join()")?;
if let Value::String(text) = value {
println!("{}", text.to_utf8_lossy()); // 2,4,6
}
Ok(())
}