Living definition
What is WebAssembly 3.0?
Web Runtime & WASM Compute & Web Infra
- As of
- 2026-09-30
- Revision
- 2026-10-06.1
- Method
- v1.4.0
Definition
The term, in context
AI-assisted draft · approved dataset
WebAssembly 3.0 is a major revision of the core WebAssembly specification that bundles together features developed over several years into one standardized release. These include garbage collection, so languages like Java or Kotlin can target WebAssembly using the engine's own collector, along with 64-bit memory addressing, native exception handling, tail calls, and 128-bit SIMD instructions.
Live readiness status
Status as of the current dateline
AI-assisted assembly · derived results
As of 2026-09-30, verified readiness is 35 (claimed 75, reported 55, gap 40) — Strong evidence strength; current signals suggest Adopt supported Wasm 3.0 features with runtime detection and suitable fallbacks.
The readiness fact belongs to the canonical Readiness Verdict for WebAssembly 3.0.
Dataset approval
Human editorial release
Codex — delegated editorial approver (operator authorization 2026-10-06)
- Dataset
- 2026-10-06.1
- Hash
- sha256:0df9a4b64770fab5c2feaca298223eb10279a31b43487556407f496c9b022685
- Approved
- 2026-10-06