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Software · Development

SASM

Simple cross-platform IDE for NASM, MASM, GAS and FASM assembly languages.

  • Completely free
  • Windows and Linux
  • Open source
  • No account

Overview

SASM is a code editor, available on Windows and Linux.

Features described in its Flathub listing: syntax highlighting and debugging.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “Simple cross-platform IDE for NASM, MASM, GAS and FASM assembly languages” — Flathub, 10 November 2026
  • “SASM has syntax highlighting and debugger.” — Flathub, 10 November 2026
  • “SASM has syntax highlighting and debugger.” — Flathub, 10 November 2026

At a glance

All of SASM is free: no feature is locked behind a paid plan, and its code is open.

Its licence (GPL-3.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

  • Open source code
  • No account needed
  • Commercial use allowed

About

SASM (SimpleASM) - simple Open Source cross-platform IDE for NASM, MASM, GAS, FASM assembly languages. SASM has syntax highlighting and debugger. The program works out of the box and is great for beginners to learn assembly language. SASM is translated into Russian, English, Turkish (thanks Ali Goren), Chinese (thanks Ahmed Zetao Yang), German (thanks Sebastian Fischer), Italian (thanks Carlo Dapor), Polish (thanks Krzysztof Rossa), Hebrew (thanks Elian Kamal), Spanish (thanks Mariano Cordoba). Licensed under the GNU GPL v3.0. Based on the Qt.

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Official plan pages (pricing, licence, terms) (commercial use) —
  • Facts collected from Winget (Windows Package Manager) (credit card, account, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Last technical check: 8 November 2026
  • Description from Flathub — AppStream (Flathub)

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