Interactive Playgrounds
Code. Explore. Break Things.
25 interactive playgrounds — most running in your browser via WebAssembly.
No account needed, no data leaves your machine.
All client-side
Zero setup
Works offline
🔍
No playgrounds match your search.
Data & SQL
Query, analyze, and visualize data — no database setup required.
New
🧪 Data Lab
DuckDB WASM + Pyodide + Local AI (WebLLM) SQL + Python + AI in one environment. Upload CSV/Parquet, query with DuckDB, analyze with pandas, plot with matplotlib, ask a local LLM about your data — all in your browser. →🦆 SQL Playground
DuckDB WASM Query CSV, JSON, and Parquet files with SQL. Upload your own data or load from URL. Auto-generates charts from query results. →🐘 PostgreSQL Playground
PGlite (PostgreSQL 16 WASM) + 23 Extensions Real PostgreSQL in your browser — with pgvector, pgcrypto, pg_trgm, ltree, earthdistance, and more. Full Postgres compatibility. →📊 PG EXPLAIN Visualizer
Client-side JSON/Text Parser Paste your EXPLAIN ANALYZE output and get an interactive visual query plan. Highlights slow nodes, shows buffer usage, and identifies optimization opportunities. →🔗 Connection String Builder
Interactive Form Generate PostgreSQL connection strings for every language — Python, Go, Node.js, Rust, Java, .NET, Ruby, and more. Includes SSL configuration. →Python & Notebooks
Write and run Python, build Streamlit apps, and explore data in reactive notebooks.
New
🖥 x86 Virtual Machines
v86 x86 Emulator (WebAssembly) Run real operating systems in your browser — Linux, FreeBSD, Android, Windows, ReactOS, Haiku, and 60+ more. Full x86 emulation via WebAssembly. Click, boot, type. → New🎓 Learn Python
futurecoder (open source) Interactive Python course from scratch — variables, loops, strings, lists, functions. Hands-on exercises with instant feedback. Progress saved locally. →⚡ Python Sandbox
Pyodide (Python 3.12 WASM) Full Python interpreter in your browser. Install packages with micropip, run scripts, and see output in a built-in terminal. Great for quick experiments. →📱 Python & Streamlit
stlite (Streamlit + Pyodide WASM) Build interactive Streamlit apps right in your browser. Edit code on the left, see the live app on the right. Drag the divider to resize. →📓 Jupyter Notebook
JupyterLite (Pyodide WASM) Full Jupyter notebook experience in the browser. Create notebooks, install packages, render plots. Notebooks persist in your browser's storage. →🔄 Marimo Notebook
Marimo WASM Reactive Python notebooks where changing a cell automatically updates all dependent cells. No stale state, no hidden bugs. Pure Python files. →✏️ PyScript Editor
Pyodide (Python WASM) Full Python editor with Ctrl+Enter execution. Fetch APIs, create Matplotlib charts, analyze data with pandas. Install any pure Python package. →Security & Auth
Decode, debug, and understand authentication tokens and cryptographic tools.
New
🛡 RBAC Visualizer
Canvas + SQL Generator Visualize Snowflake role hierarchies. Add roles, grants, users — see the graph, click to inspect effective privileges, generate SQL. Drag nodes to rearrange. → New🔗 Encryption Pipeline
Web Crypto API Chain cryptographic operations visually — AES-GCM encrypt, RSA sign, HMAC, SHA-256 hash, base64 encode, wrap in JWT. Each step shows real-time input/output. →🎟️ JWT Debugger
Client-side JavaScript + Web Crypto API Decode any JWT, edit the header and payload, verify signatures with HMAC or RSA keys. Understand how tokens work by taking them apart. →❄️ Snowflake Report Builder
stlite (Streamlit WASM) + Snowflake SQL API Build Streamlit dashboards against your Snowflake account using External OAuth. Run SQL queries, view results as tables and charts — all in your browser. →🔑 Snowflake External OAuth Generator
Web Crypto API Generate a complete Snowflake External OAuth setup — RSA key pair, security integration SQL, token generator UDF, MCP server, and RBAC grants. → New📱 Device Code Flow
Backend API + Web Crypto API Experience the OAuth 2.0 Device Authorization Grant (RFC 8628). Request device codes, authenticate at a verification URL, and receive signed JWTs with optional Snowflake-compatible claims. Includes JWKS endpoint and AES key exchange. →🛡️ Crypto & JWT Playground
JupyterLite + xeus-python + cryptography (WASM) Practice AES encryption, RSA key pairs, JWT token creation, hashing, and HMAC in interactive Jupyter notebooks. Full Python cryptography library. →AI & Embeddings
Experiment with AI models, vector embeddings, and semantic search — all in the browser.
New
🧠 AI Python Editor
Monaco + Qwen2.5-Coder (WebGPU) + Pyodide A Claude Code-like experience in your browser. Monaco editor with AI-powered inline completions, chat sidebar for code generation, and Python execution via WebGPU. → New🧬 AI Embeddings, pgvector & Coding
WebLLM / API + Transformers.js + PGlite + pgvector AI-assisted coding with vector embeddings and PostgreSQL. Use local AI or bring your API key. Build semantic search, document clustering, and RAG systems. →Creative & Games
Sketch architectures, build games, and let your imagination run wild.