Overview
What is JWasm?
JWasm : A MASM-compatible assembler that can be launched via the command prompt, providing native support for various output formats and instructions
In depth
A closer look at JWasm
JWasm is built as a straight-forward, accessible and useful MASM compatible assembler. JWasm is a tool that comes with native support for various output formats such as Intel OMF, MS Coff (32- and 64-bit), Elf (32-and 64-bit), Bin and DOS MZ). JWasm is written in C and supports instructions up to AVX.
Verdict
Should you download JWasm?
JWasm runs on
Windows 10/11
and is available under the
Freeware
license
— the installer is 400 KB.
We’ve catalogued it under
General.
✓
Verified clean. Every JWasm build on SoftLookup is scanned for viruses, spyware, adware, trojans and backdoors. We re-test on every update.
Sponsored
At a glance
JWasm specifications
- Publisher
-
Japheth
- Last updated
- Apr 25, 2026
- License
- Freeware
- Operating system
- Windows 10/11
- File size
- 400 KB
- Price
- Free
- Page views
- 573
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