bytecodealliance/wasm-tools

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CLI and Rust libraries for low-level manipulation of WebAssembly modules

Stars: 1.8k
Forks: 351
Open beginner issues: 0
Indexed issues: 109
Avg merge: 1d 6h
Merged PRs (30d): 46

Dominant language: Rust
License: Apache-2.0
Last GitHub push: Sep 14, 2026
Latest indexed: Sep 14, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue help wanted

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108 open issues indexed

Request for Updated Usage Tutorial and AFL Integration Guide for wasm-mutate in wasm-tools Open

bytecodealliance/wasm-tools#1349 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Add Wasm GC support to `wasm-mutate` and `wasm-shrink` Open

bytecodealliance/wasm-tools#1358 · 0 comments · 3 reactions · 0 assignees · Indexed Sep 14, 2026
wit: Migrate from `float32`/`float64` to `f32`/`f64` Open

component-model wit

bytecodealliance/wasm-tools#1361 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
wit: migrate to only accepting `///` for doc comments Open

component-model wit

bytecodealliance/wasm-tools#1362 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
stringref Open

bytecodealliance/wasm-tools#1367 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
wasm_encoder does not increase TypeSection num_added length proportionally to amount of types in recursive type Open

bytecodealliance/wasm-tools#1393 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Making wast parse results serializable Open

bytecodealliance/wasm-tools#1428 · 5 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
wit-parser: parse multiple packages and automatically resolve Open

bytecodealliance/wasm-tools#1433 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Support relaxed kebab case for filenames in `compose` Open

bytecodealliance/wasm-tools#1440 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
"component is not compatible with import" error is returned when combining components with resources using dependencies Open

bytecodealliance/wasm-tools#1452 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Relax WIT directory structure Open

bytecodealliance/wasm-tools#1461 · 0 comments · 3 reactions · 0 assignees · Indexed Sep 14, 2026
Don't require the `wit/` root directory to contain a package Open

bytecodealliance/wasm-tools#1462 · 0 comments · 2 reactions · 0 assignees · Indexed Sep 14, 2026
`json-from-wast`: differences to wabt's `wast2json` Open

bytecodealliance/wasm-tools#1471 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Add a top-down code generation option to `wasm-smith` Open

wasm-smith

bytecodealliance/wasm-tools#1484 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
`wasmparser::validator::ComponentState::validate_and_register_named_types` should return `Result` instead of `bool` Open

bytecodealliance/wasm-tools#1486 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Compose example fails Open

bytecodealliance/wasm-tools#1502 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
`wasm-tools print --skeleton` with no core modules Open

bytecodealliance/wasm-tools#1527 · 0 comments · 2 reactions · 0 assignees · Indexed Sep 14, 2026
wasi-virt throws error in wasm-compose (redirected from wasi-virt to Wasm-tools) Open

wasm-compose

bytecodealliance/wasm-tools#1565 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
wave: Require escaping some "problematic" unicode characters Open

bytecodealliance/wasm-tools#1629 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
shrink: Ineffective on non-tree-like expressions (?) Open

wasm-mutate

bytecodealliance/wasm-tools#1633 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
wasmparser accepts some malformed modules Open

bytecodealliance/wasm-tools#1671 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
`wit-component` should accept modules with shared memories Open

bytecodealliance/wasm-tools#1674 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
wit: propose to propogate World's name to inline Interfaces' names Open

bytecodealliance/wasm-tools#1805 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
wit: unexpected error when referencing the package itself in exports Open

bytecodealliance/wasm-tools#1809 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
Release notes for this repository Open

bytecodealliance/wasm-tools#1826 · 0 comments · 2 reactions · 0 assignees · Indexed Sep 14, 2026
Should hash maps be removed from `wasmparser`? Open

bytecodealliance/wasm-tools#1876 · 0 comments · 4 reactions · 0 assignees · Indexed Sep 14, 2026
Support multiple packages with deps that have the same versions Open

bytecodealliance/wasm-tools#1996 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Conflicting imports of wasi cause wasm-component-ld error. Open

bytecodealliance/wasm-tools#2047 · 2 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
wasm-shrink doesn't work as described? Open

bytecodealliance/wasm-tools#2051 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[wasm-metadata] print imports and exports Open

bytecodealliance/wasm-tools#2058 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
Impossible to instantiate `wasmparser::V128` Open

bytecodealliance/wasm-tools#2101 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Improved tools for creating wasm objects manually Open

bytecodealliance/wasm-tools#2117 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
support type imports in `wasm-tools` Open

bytecodealliance/wasm-tools#2126 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
`wasmparser`: 15-30% performance regressions from v228 -> v229 Open

bytecodealliance/wasm-tools#2180 · 22 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Impossible to implement `VisitOperator::simd_visitor` generically Open

bytecodealliance/wasm-tools#2181 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
wasm-component generate components for modules with host function imports Open

bytecodealliance/wasm-tools#2185 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Unstable error variant in unstable function leads to compilation error Open

wit

bytecodealliance/wasm-tools#2210 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Allow `component targets` to validate a binary in a semver-compatible manner Open

wit

bytecodealliance/wasm-tools#2220 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
`package hello:wasm/subpackage@1.0.0` doesn't work Open

bytecodealliance/wasm-tools#2277 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Support parsing of `target_features` section Open

bytecodealliance/wasm-tools#2284 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Extend `wasm-tools component new` to support preexisting wasip1 modules without cabi_realloc Open

bytecodealliance/wasm-tools#2289 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Suppot lists of WITs without requiring topological ordering Open

wit

bytecodealliance/wasm-tools#2292 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
wit-parser: Doc comments on interface imports/export world items are discarded Open

wit

bytecodealliance/wasm-tools#2294 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
wit-dylib: Generate helper functions during lifting/lowering Open

wit-dylib

bytecodealliance/wasm-tools#2308 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Missing tests for some `component new` flags Open

bytecodealliance/wasm-tools#2338 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Feature Request: Add the ability to add user defined Custom Sections to wasm modules. Open

bytecodealliance/wasm-tools#2351 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Consider replacing the `ValType` enum with an opaque 32-bit integer. Open

wasmparser

bytecodealliance/wasm-tools#2370 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
wasm-tools in wasm & JS Open

bytecodealliance/wasm-tools#2374 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Add support for nested namespaces and packages Open

bytecodealliance/wasm-tools#2393 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 14, 2026
`wasm-encoder` relocation data generation Open

bytecodealliance/wasm-tools#2405 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026

bytecodealliance/wasm-tools

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