# WasmLens: exploratory WebAssembly inspection

> Python CLI with static paths for inspecting WebAssembly sections and function signatures, producing WAT-style instruction listings, and reconstructing limited C-like pseudocode. These are exploratory analysis aids for supported modules, not recovered original source or a complete WebAssembly runtime.

- Type: Tool
- Targets: Binary
- Category: WebAssembly tools
- Relationship: Foundation tool
- Sources reviewed: 2026-10-20
- Added to the catalog: 2026-10-20
- Original resource: <https://github.com/alexandrmotologa/wasmlens>
- Primary source: <https://github.com/alexandrmotologa/wasmlens/blob/2351cccea90f812053b30d1ad14816d3c664a4f7/README.md>
- Catalog page: <https://awesomerea.org/resources/wasmlens/>
- Record JSON: <https://awesomerea.org/resources/wasmlens/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/wasmlens/index.md)

## Requirements & limits

- The reviewed package declares version 0.1.0 and Python >=3.10, with Typer, Rich, FastAPI, Uvicorn, Pydantic, NetworkX and python-multipart dependencies; pytest/httpx are development extras. The source includes an MIT LICENSE. Dependency lower bounds are declared.
- The info, disasm and decompile commands read a supplied .wasm file through the same parser. That parser has no 0xFD SIMD decoding branch and may label unsupported opcodes as unknown.
- The WAT-style module listing is not a lossless reassembly format: data segments are reduced to previews of up to 32 bytes and active offsets use a placeholder. The C-like reconstructor has no general fallback for unhandled instructions, uses only the first result type, and expresses branch labels in comments.
- Its dispatch lacks handlers for operations including floating-point arithmetic and indirect calls, and an unhandled instruction can advance the program counter without implementing its effect.
- Supply only modules you are permitted to analyze.

## Primary sources

1. <https://github.com/alexandrmotologa/wasmlens/blob/2351cccea90f812053b30d1ad14816d3c664a4f7/README.md>
2. <https://github.com/alexandrmotologa/wasmlens/blob/2351cccea90f812053b30d1ad14816d3c664a4f7/pyproject.toml>
3. <https://github.com/alexandrmotologa/wasmlens/blob/2351cccea90f812053b30d1ad14816d3c664a4f7/LICENSE>
4. <https://github.com/alexandrmotologa/wasmlens/blob/2351cccea90f812053b30d1ad14816d3c664a4f7/src/wasmlens/cli/main.py>
5. <https://github.com/alexandrmotologa/wasmlens/blob/2351cccea90f812053b30d1ad14816d3c664a4f7/src/wasmlens/parser/module.py>
6. <https://github.com/alexandrmotologa/wasmlens/blob/2351cccea90f812053b30d1ad14816d3c664a4f7/src/wasmlens/parser/section_parser.py>
7. <https://github.com/alexandrmotologa/wasmlens/blob/2351cccea90f812053b30d1ad14816d3c664a4f7/src/wasmlens/parser/opcodes.py>
8. <https://github.com/alexandrmotologa/wasmlens/blob/2351cccea90f812053b30d1ad14816d3c664a4f7/src/wasmlens/disassembler/wat_formatter.py>
9. <https://github.com/alexandrmotologa/wasmlens/blob/2351cccea90f812053b30d1ad14816d3c664a4f7/src/wasmlens/decompiler/reconstructor.py>
10. <https://github.com/alexandrmotologa/wasmlens/blob/2351cccea90f812053b30d1ad14816d3c664a4f7/src/wasmlens/decompiler/ast.py>
11. <https://github.com/alexandrmotologa/wasmlens/blob/2351cccea90f812053b30d1ad14816d3c664a4f7/src/wasmlens/emulator/vm.py>
12. <https://github.com/alexandrmotologa/wasmlens/blob/2351cccea90f812053b30d1ad14816d3c664a4f7/tests/test_decompiler.py>
13. <https://github.com/alexandrmotologa/wasmlens/blob/2351cccea90f812053b30d1ad14816d3c664a4f7/tests/test_parser.py>

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## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.