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WebAssembly Specification — WebAssembly 3.0 (2026-03-26)

  • Introduction
    • Introduction
    • Overview
  • Structure
    • Conventions
    • Values
    • Types
    • Instructions
    • Modules
  • Validation
    • Conventions
    • Types
    • Matching
    • Instructions
    • Modules
  • Execution
    • Conventions
    • Runtime Structure
    • Numerics
    • Types
    • Values
    • Instructions
    • Modules
  • Binary Format
    • Conventions
    • Values
    • Types
    • Instructions
    • Modules
  • Text Format
    • Conventions
    • Lexical Format
    • Values
    • Types
    • Instructions
    • Modules
  • Appendix
    • Embedding
    • Profiles
    • Implementation Limitations
    • Type Soundness
    • Type System Properties
    • Validation Algorithm
    • Custom Sections and Annotations
    • Change History
    • Index of Types
    • Index of Instructions
    • Index of Semantic Rules

  • Index of Types

  • Index of Instructions

  • Index of Semantic Rules

  • Index