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NASM — The Netwide Assembler
This is the project webpage for the Netwide Assembler (NASM), an assembler for the x86 CPU architecture portable to nearly every modern platform, and with code generation for many platforms old and new.
| Stable | 3.01 | 2025-10-11 | Release notes | Documentation |
|---|---|---|---|---|
| Development snapshot | 3.01-20251011 | 2025-10-11 | Release notes | Documentation |
| Stable, release candidates, prereleases | Development snapshots |
Development Team
NASM was originally developed by Simon Tatham and Julian Hall, and is now maintained by a team led by H. Peter Anvin of Intel Corporation.
Currently active team members are:
- H. Peter Anvin
- Cyrill Gorcunov
- Sheng Yongjie
- Maciej Wieczor-Retman
... with support from many others, and we are always looking for more developers.
Moving more services to github
We will be moving more services to github in the near future. The github Issues are now open and preferred over bugzilla. The forums are intended to be replaced by github discussions and wiki when they are set up in the near future.
License
As of version 2.07, NASM is now under the Simplified (2-clause) BSD license. The details of the license are available in the documentation.
Bug reports
Please report bugs to our bug tracker. Unfortunately we are often unable to address things immediately, but we will look at them as soon as we can.
©1996-2025 The NASM development team