Code Playgrounds for Browser-Based Experiments
4 free browser-based tools
Focused in-browser sandboxes for HTML, JavaScript, TypeScript and SQL with live previews, console output, starter code and local execution.
Code Playgrounds are for small experiments where a full project setup would slow the idea down. Write a snippet, run it, inspect the result and reset when you want a clean starting point.
Frontend snippets render inside a sandboxed preview frame, JavaScript and TypeScript capture console output, and SQL runs against a local SQLite database in the browser.
Use this category for lessons, docs examples, interview practice, quick UI prototypes and query experiments. Larger apps still belong in a full local IDE or repository.
Useful next steps: HTML CSS JS Playground, JavaScript Playground, TypeScript Playground, SQL Playground.
Popular Use Cases
- Prototype a small HTML/CSS/JS interaction
- Practice JavaScript arrays, objects and functions
- Compile TypeScript examples and inspect JavaScript output
- Run SQLite queries against sample tables
All Code Playgrounds
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Code Playgrounds FAQ
Do playgrounds upload my code?
No. The playgrounds are built for browser-side execution and local draft storage. SQL uses an in-memory SQLite database in the browser.
Are these a replacement for a full IDE?
No. They are lightweight sandboxes for snippets, examples and learning. Use a local project for packages, build tools and production apps.
Why do some browser APIs or Node APIs not work?
Playgrounds run in browser sandboxes. Node-only APIs are unavailable, and preview frames are intentionally isolated for safety.