# netwide-assembler/nasm

A cross-platform x86 assembler with an Intel-like syntax

Repository: https://github.com/netwide-assembler/nasm
Canonical: https://ross.abutalabs.com/products/nasm
Homepage: https://www.nasm.us/
Language: Assembly
License: NOASSERTION
License Family: other
Topics: assembler, assembler-x86, assemblers, nasm, nasm-assembler, nasm-language, x86
Last push: 2026-08-19T23:47:10+00:00

## Health v2 (maintenance only)
Score: 76/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 98, release rhythm 35, longevity 100
- inputs: {"age_days": 3055, "days_push": 14, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3287, forks 415 (observed 2026-08-28T04:07:53.824096+00:00)

## What it is
NASM (the Netwide Assembler) is a portable, cross-platform assembler for the x86 and x86-64 CPU architectures using Intel-like syntax. It supports many output formats and is licensed under the 2-clause BSD license.

## Use cases
- assemble x86 assembly code
- write bootloaders or OS kernels in assembly
- compile assembly for x86-64 with Intel syntax
- generate object files in multiple formats like ELF or COFF
- learn x86 assembly programming

## When to choose
- you need a mature, portable x86 assembler with Intel syntax
- you target multiple output formats and platforms
- you are writing low-level code such as bootloaders, kernels, or optimized routines

## When to avoid
- you prefer AT&T syntax (consider GNU as)
- you need a high-level assembler with macros for other architectures like ARM

## Facets
- artifact type: cli-tool
- maturity: stable
- function: compiler, developer-tools
- domain: developer-tools, operating-systems, embedded-systems
- platform: windows, cross-platform, cli
- tags: assembler, x86, assembly-language, intel-syntax, low-level-programming, linux, macos

## Member repositories
- netwide-assembler/nasm (main) score 76

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:53.824096+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:22:54.775623+00:00, confidence not recorded.
  - readme: https://github.com/netwide-assembler/nasm (fetched 2026-08-28T04:07:53.824096+00:00, sha fe2c57ae95ae)
  - homepage: https://www.nasm.us/ (fetched 2026-08-29T09:35:51.508298+00:00, sha 99cebf14ed6b)
  - site_page: https://www.nasm.us/docs.html (fetched 2026-08-29T09:35:51.510708+00:00, sha 7066c5118931)
- Data as of 2026-08-30T08:39:29.467469+00:00.