---
id: evmdasm
version: "0.1.10"
license: GPLv2
license_treatment: copyleft
maintenance: abandoned
---

# evmdasm — A lightweight ethereum evm bytecode asm instruction registry and disassembler library.

License: copyleft · Maintenance: abandoned · Downloads: 131.4K/mo

## What it is and what it does

evmdasm is a minimal, dependency-free library for working with Ethereum EVM bytecode at the instruction level. It provides a static registry of EVM opcodes and a disassembler that converts raw bytecode into a sequence of named instructions with operands. The library is intentionally lightweight—it does not perform high-level analysis, dynamic execution, or semantic interpretation, leaving those tasks to higher-level tools that build on top of it.

The package is designed as a foundation for other Ethereum analysis tools. Because it has no runtime dependencies and a narrow scope, it installs instantly and remains stable for basic bytecode inspection and disassembly tasks.

Use it for:

- Disassemble raw EVM bytecode into human-readable mnemonics and operands for manual inspection
- Build a higher-level Ethereum analysis tool that needs a reliable opcode registry and bytecode parser
- Analyze smart contract bytecode to extract instruction sequences for static analysis
- Integrate bytecode parsing into security auditing or reverse-engineering workflows

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

evmdasm provides a lightweight registry of Ethereum EVM opcodes and a disassembler for EVM bytecode, with no external runtime dependencies.

Yes, if you need lightweight EVM bytecode disassembly with zero dependencies and accept that the project is no longer maintained. It is stable for its narrow scope. No, if you require active maintenance, support for recent EVM opcodes, or high-level analysis features—use a maintained alternative instead.

## Install

pip install evmdasm
uv add evmdasm
poetry add evmdasm

## Installing evmdasm

Before you install: Installation is frictionless with no runtime dependencies, but the project is abandoned—last commit was 2023-06-09 and no releases since 2022-03-11. It remains stable for its narrow scope, but expect no maintenance or updates.

License in practice: Licensed under GPLv2 (copyleft). Any derivative work or distribution must also be open-source under compatible terms; proprietary use is not permitted.

Quickstart:

pip install evmdasm

from evmdasm import EvmBytecode

bytecode = EvmBytecode(bytecode_hex)
for instruction in bytecode:
    print(instruction.mnemonic, instruction.operand)

Verify before relying:

- Whether the opcode registry covers all EVM versions or only those current as of the 2022-03-11 release
- Whether the disassembler handles all EVM bytecode formats or has known limitations
- Specific API surface and available methods beyond basic bytecode iteration

## Package facts

- License: GPLv2 (copyleft)
- Python support: unspecified
- Install friction: low
- Maintenance: abandoned
- Downloads: 131.4K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

evm bytecode disassembler, ethereum opcode registry, evm instruction decoder, ethereum bytecode analysis, evm disassembly library, ethereum, bytecode-analysis, abandoned

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