Free RISC-V AssemblerTurn assembly into machine code you can copy.

Paste RV32IM assembly and see each instruction's address, hex word and decoded form.
Copy the code as hex, download .hex or .bin, or run it right here to check it works.

RV32I + MHex, .hex and .binRun to check

No sign-up Runs in your browser Nothing to install

Loading the RISC-V simulator…

Your program is saved in this browser. Download it to keep a copy.

THREE SIMPLE STEPS

How to use the RISC-V Assembler

Paste your assembly

Type or open a .s file. Labels, pseudo-instructions like li and la, and .data directives all work.

Assemble

Press Assemble. Errors point at their line; the Machine code tab lists every instruction word.

Copy or download

Copy the words as hex, one per line, or download a .hex or raw little-endian .bin file.

WaveSpeed AI

From code to visuals

Need an illustration of your processor design or a clip for your course? Create it with WaveSpeed AI.

Start creating Explore 1,000+ AI Models

1,000+ AI models
Image, video and 3D
Pay as you go

$1 in free credits for eligible new accounts. No card needed. Generators have separate account and credit requirements. The RISC-V simulator is free.

RISC-V Assembler FAQ

Is this RISC-V assembler free?

Yes. This online RISC-V assembler is free, with no account, no limits and nothing to install.

What does the hex output look like?

One 32-bit instruction word per line, eight hex digits, starting at the first instruction. The .bin file holds the same words as little-endian bytes.

Are pseudo-instructions expanded?

Yes. li, la, call, tail and lw with a label become the one or two real instructions you see in the listing, with the same encodings a standard RISC-V toolchain produces.

Which addresses does it use?

Code starts at 0x00400000 and data at 0x10010000, so branch offsets and la addresses match the common teaching simulators.

Is my code uploaded?

No. It is assembled in your browser and saved only in this browser's storage.

All Free Tools

RISC-V Simulator