Teske Lab · Tooling

RISC-V Online Assembler

Assemble, link, inspect sections, and extract text/data binaries directly in the browser using a WebAssembly build of GNU binutils.

Pipeline gas → ld → objdump → objcopy

Binutils Detecting...

Target riscv64-linux-gnu

ISA Controls

Configure the assembler architecture string passed to GNU as.

Base ISA ABI Advanced extensions Custom assembler flags

Hypervisor (h) Vector (v)

Effective flags -march=rv64gc -mabi=lp64d

Assembly

Type or paste RISC-V source to assemble.

Linker Script

Control memory layout and output addresses.

Build current workspace Runs the full browser-side toolchain and refreshes all result panes below. Use Ctrl/Cmd + Enter to build.

Build

Please wait while building

ConsoleWaiting for build

Code
Hex DumpWaiting for build

Data
Hex DumpWaiting for build

Objdump Code
DisassemblyWaiting for build

Objdump
Full HexWaiting for build

Cite this tool

If RISC-V Online Assembler helped your research or teaching, a citation is appreciated.

BibTeX@misc{teske2026riscvasm,
  title={RISC-V Online Assembler},
  author={Teske, Lucas},
  year={2026},
  howpublished={\url{https://riscvasm.lucasteske.dev/}},
  note={Browser-based RISC-V assembler powered by a WebAssembly build of GNU binutils. Source: https://github.com/racerxdl/riscv-online-asm. ORCID: 0009-0002-8526-7662}
}