x86 and x64 Intel Assembler
The online assembler converts x86 and x64 instructions into machine-code bytes.
About x86 and x64 Intel Assembler
Converts x86 and x64 assembly instructions written in Intel syntax into machine-code bytes. It also converts hexadecimal machine code back into readable instructions using GCC and objdump, and accepts pasted hex with 0x prefixes and non-hex characters such as C-style string formatting.
Key features
- Converts x86 and x64 Intel-syntax assembly to machine code
- Converts hexadecimal machine code to readable instructions
- Strips 0x prefixes and skips non-hex characters
- Accepts pasted C-style string literals and arrays
- Uses GCC and objdump behind the scenes
Best for: People learning how x86 instructions are encoded or working with shellcode development.
Good for
- Converts in both directions between assembly and machine code
- Accepts C-style literals without manual cleanup
- Handles both x86 and x64 instructions
Watch out for
- Expects assembly input in Intel syntax
x86 and x64 Intel Assembler at a glance
- Category
- Privacy & Security › Security Tools
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web, Windows
- Open source
- Not stated
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Open source
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x86 and x64 Intel Assembler FAQ
Does the tool also disassemble machine code?
Yes. It transforms a hexadecimal string of machine code into readable instructions.
What syntax should assembly input use?
Intel syntax.
Can I paste a C-style string for disassembly?
Yes. 0x prefixes are removed and non-hex characters are skipped, so quotes and \x do not need to be removed.
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