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 |
|---|---|---|---|---|
| Release candidate | 3.02rc7 | 2026-04-22 | Release notes | Documentation |
| Development snapshot | 3.02rc7-20260422 | 2026-04-22 | Release notes | Documentation |
| Stable, release candidates, prereleases | Development snapshots |
: You can purchase a license directly from the creator at Sensatype for approximately $15.
Licensing options usually include: