Miden Playground

An interactive browser environment for writing, compiling, and executing Miden Assembly (MASM) programs. No installation required — prototype account code, test note scripts, and experiment with VM instructions straight from a URL.

External · playground.miden.io

Open the Playground ↗

Launch the browser IDE and start writing MASM immediately.

→Reference · MASM

Miden VM reference

Instruction set, stack semantics, chiplets, and assembler behaviour.

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What you can do

Editor

Write MASM

Syntax-highlighted editor with inline error reporting for the Miden assembler.

VM

Execute programs

Run programs against the Miden VM in-browser and inspect the resulting stack and memory.

Workflow

Share snippets

Shareable URLs with embedded code for reproducing bugs or teaching examples.

When to graduate from the Playground

The Playground shines for learning MASM and for quick prototyping. For anything bigger than a snippet — components, storage, note dispatch, transaction flows — move to a miden new Rust project locally. See your first smart contract for the handoff.

Related

Tutorial

First smart contract

Install the toolchain and build + deploy a counter contract in Rust.

→v0.14

MASM in v0.14

New word(...) / event(...) constants, std::math::u128, and other MASM-level deltas.

→Reference

Smart contracts reference

Accounts, notes, transactions, and the Rust SDK surface.

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