Pterocos: A free online editor for Python, Ruby, SQL, Lua, and web code

I've been building a free online editor called Pterocos, and I just added Ruby support. It runs entirely in the browser - no installation and no signup

What Pterocos supports

Language	Status
Python	✅
Ruby	✅ (NEW!)
SQL (SQLite & DuckDB)	✅
Lua	✅
HTML/CSS/JS	✅

Why I built this

I wanted a single place where I could:

• Quickly prototype Python or Ruby scripts without activating a virtual environment
• Test SQL queries (SQLite and DuckDB) alongside code
• Share runnable examples with teammates or students
• Experiment with multiple languages without switching local setups

Try it

https://pterocos.eu.org

All data stays in your browser (localStorage). No tracking. No analytics. Free forever [citation:5].

What's next?

I'm actively adding features based on feedback. What would make this more useful for your workflow?

• More language support?
• Collaboration features?
• Something else?

Let me know in the comments!

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Tags: #python #ruby #sql #webdev #showdev