Best Programming Playground Products in 2025

A front end web development playground.

Key CodePen features:

Real-time Collaboration Immediate Visual Feedback Integrated Development Environment (IDE) Community-Driven

Monitor all your cloud services with our status page aggregator. IT teams choose IsDown to monitor all their vendors and get alerts whenever an outage occurs. Integration with Datadog, PagerDuty, Slack, Microsoft Teams, and a lot more.

Key IsDown.app features:

Status Dashboard Multiple Profiles for same account Slack App Zapier Integration

Try for free paid Free Trial $37.0 / Monthly (Pro)

Reload-free 2-way input ⇄ output sync + remote output; programmable embeds; global edge storage and workers.

freemium $10.0 / Monthly (PRO)

Vercel is the platform for frontend developers, providing the speed and reliability innovators need to create at the moment of inspiration.

Key Vercel features:

Easy Deployment Fast Performance Serverless Functions Integration with Next.js

#1 playground that connects to the APIs of major large language models.

freemium $8.0 / Monthly

Online VS Code Editor for Angular and React.

Key StackBlitz features:

Speed Ease of Use Zero-Setup Integrations

Open Source

Online playground for React.

Key CodeSandbox features:

Ease of Use Instant Collaboration Pre-configured Environments Integrated Development

Open Source

GPT-3 access without the wait.

Key OpenAI features:

Advanced AI Research User-Friendly Tools Broad Application Scope Commitment to Safety

Open Source

Claude is a next generation AI assistant built for work and trained to be safe, accurate, and secure. An AI assistant from Anthropic.

Key Claude AI features:

Advanced Natural Language Processing High Customizability Scalability Robust Plugin Ecosystem

Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.

Key JSFiddle features:

Easy Sharing and Collaboration Real-Time Editing Supports Multiple Frameworks Embed Feature

Explore, learn, and share SQL queries in our free online SQL playground. Support for MySQL and PostgreSQL, perfect for testing and enhancing your SQL skills.

Sample of the bin:.

Key JS Bin features:

Real-time Collaboration Instant Preview Embed Feature Debugging Tools

Open Source

Code, create, andlearn together. Use our free, collaborative, in-browser IDE to code in 50+ languages — without spending a second on setup.

Key replit features:

Ease of Use Collaborative Coding Supports Multiple Languages Cloud-Based

Multi language programming playground for developers.