bytecodealliance

bytecodealliance/wasmtime

A lightweight WebAssembly runtime that is fast, secure, and standards-compliant

18.3K stars 1.8K forks 18.3K watchers Rust Apache License 2.0
aot cranelift jit lightweight portable runtime rust sandbox standalone wasi wasm wasmtime webassembly
View on GitHub Website
6 Open Issues Need Help Last updated: Jul 1, 2026

Open Issues Need Help

View All on GitHub
Support x86-32 in new instruction selection framework 7 days ago
enhancement help wanted cranelift cranelift:area:x86 cranelift:new-target
bytecodealliance/wasmtime
18.3K

A lightweight WebAssembly runtime that is fast, secure, and standards-compliant

Rust
#aot#cranelift#jit#lightweight#portable#runtime#rust#sandbox#standalone#wasi#wasm#wasmtime#webassembly
Cranelift: `cls` not implemented for any type on x86_64 4 months ago
bug good first issue cranelift
bytecodealliance/wasmtime
18.3K

A lightweight WebAssembly runtime that is fast, secure, and standards-compliant

Rust
#aot#cranelift#jit#lightweight#portable#runtime#rust#sandbox#standalone#wasi#wasm#wasmtime#webassembly
implement initial-cwd for wasi:cli/environment 6 months ago
good first issue
bytecodealliance/wasmtime
18.3K

A lightweight WebAssembly runtime that is fast, secure, and standards-compliant

Rust
#aot#cranelift#jit#lightweight#portable#runtime#rust#sandbox#standalone#wasi#wasm#wasmtime#webassembly
ISLE: debugging feature to emit logging in the generated code 8 months ago
good first issue cranelift:E-compiler-easy isle
bytecodealliance/wasmtime
18.3K

A lightweight WebAssembly runtime that is fast, secure, and standards-compliant

Rust
#aot#cranelift#jit#lightweight#portable#runtime#rust#sandbox#standalone#wasi#wasm#wasmtime#webassembly
fuzzing: Use `wasm-encoder` rather than generating WAT text and then assembling it in dummy imports 10 months ago
good first issue fuzzing
bytecodealliance/wasmtime
18.3K

A lightweight WebAssembly runtime that is fast, secure, and standards-compliant

Rust
#aot#cranelift#jit#lightweight#portable#runtime#rust#sandbox#standalone#wasi#wasm#wasmtime#webassembly
Unsupported feature for riscv: should be implemented in ISLE: uadd_overflow.i64 10 months ago
bug good first issue cranelift:E-compiler cranelift:E-compiler-easy cranelift:area:riscv64
bytecodealliance/wasmtime
18.3K

A lightweight WebAssembly runtime that is fast, secure, and standards-compliant

Rust
#aot#cranelift#jit#lightweight#portable#runtime#rust#sandbox#standalone#wasi#wasm#wasmtime#webassembly