ByteScope

WebAssembly file format

A compiled WebAssembly binary module.

MIME type
application/wasm
Extensions
.wasm
Category
Executables & bytecode

Magic-number signature

0x000000000061736D·asm0x00 'asm'

About the WebAssembly format

WebAssembly is a portable bytecode that runs at near-native speed in browsers and standalone runtimes. A binary module starts with 00 'asm' followed by a four-byte version.

Related formats

Have a file that might be WebAssembly? Identify it with the File Type Identifier — it reads the magic number locally, nothing is uploaded. Or browse all formats.