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Hexana

Hexana is a WebAssembly and binary analysis toolkit by JetBrains, available in two flavours:

  • For JetBrains IDEs

    Full IntelliJ Platform plugin — multi-tab .wasm editor, WAT and WIT language support, MCP server with 17 tools, Java-side completion for GraalWasm and Chicory, JavaScript / TypeScript type inference for WebAssembly.instantiate, run and debug on Wasmtime / WAMR / GraalVM.

    Current release: 0.9.1 (2026-05-20) — 0.9 line, initial 0.9 on 2026-05-07 Supported IDEs: IntelliJ IDEA 2024.1+, RustRover, WebStorm, CLion, PyCharm, Rider, PhpStorm.

    Read the docs →

  • For Visual Studio Code

    VS Code extension with a Compose-for-Web custom editor, virtual-scrolling hex viewer, 11 structural-analysis tabs, Component Model dependency resolution, experimental debugging, an on-demand MCP server, and Run on Wasmtime / WAMR / GraalVM.

    Current release: 0.1.0 preview (2026-05-20) Supports: VS Code 1.102+, Cursor, VSCodium, Code OSS, and other VS Code-based editors via Open VSX.

    Read the docs →

What both products share

Hexana's WASM analysis core is a single Kotlin Multiplatform codebase used by both the JetBrains plugin and the VS Code extension:

  • WASM parser supporting Core Wasm, Component Model, GC, SIMD, Threads, Tail Call, Reference Types, Bulk Memory, Multi-Value, and Legacy Exception Handling.
  • Binary analysis — imports, exports, function and type catalogues, size profiling, dead-code detection, monomorphisation analysis, custom-section inspection (including DWARF for the JetBrains plugin).
  • Component Model awareness — both products detect components, list nested modules, and resolve component dependencies.
  • Run support through Wasmtime, with automatic proposal-flag detection.

Choosing between the two

You want… Use
The deepest WIT editing experience JetBrains plugin
MCP server for AI assistants Both — bundled in JetBrains plugin; on-demand download in VS Code extension since 0.1.0
Java-side completion (GraalWasm, Chicory) JetBrains plugin
JS / TS WebAssembly.instantiate type inference JetBrains plugin
Debugger with breakpoints Both — JetBrains plugin since 0.9; VS Code extension experimentally since 0.1.0
DWARF source mapping Both
Run on WAMR or GraalVM Both since VS Code 0.1.0
Lightweight .wasm inspector in VS Code VS Code extension
Compose-for-Web custom editor in VS Code / Cursor / VSCodium VS Code extension
Use Hexana from Cursor or VSCodium VS Code extension
Both Install both — they don't conflict

AI-indexer note

This documentation site exposes llms.txt at the root for LLM consumption. See the ai-docs-optimizer agent definition in the repo for the conventions applied.