Simple JavaScript and TypeScript playground.
JSLog is an in-browser JavaScript and TypeScript playground for writing and running code instantly.
- for
- Web developers who need a quick, no-setup environment for JS/TS experimentation.
works withJavaScriptTypeScript
Key features
6 features of JSLog
- Run code — Execute the current script with Cmd + Enter.
- Clear console — Remove all console output with Cmd + K.
- Help overlay — Show shortcut help via Cmd + /.
- Settings panel — Open configuration options with Cmd + ,.
- TypeScript support — Write and run TypeScript code directly in the browser.
- Keyboard-first workflow — All actions are accessible via keyboard shortcuts for fast iteration.
Use cases
- Test a JavaScript snippet before adding it to a project.
- Prototype TypeScript functions without a local build setup.
- Demonstrate code examples in tutorials or presentations.
- Debug small pieces of code by iteratively running them.
JSLog vs alternatives
 JSLog |  Automock |  Fluent CI |  Slides |  zippystarter | |
|---|---|---|---|---|---|
| Best for | Instant JS/TS code execution | TypeScript unit-test scaffolding | TypeScript-based CI pipelines | Animated static site generation | Quick site scaffolding |
| Pricing | Free | Free | Free | Subscription | One time fee |
| DevHunt upvotes | 7 | 148 | 158 | 153 | 111 |
| Launched | Sep 2024 | Jan 2023 | Jan 2024 | Jan 2024 | Jan 2023 |
- JSLog vs Automock: Automock provides simplified unit-test generation for TypeScript, while JSLog is a general code runner.
- JSLog vs Fluent CI: Fluent CI lets you author CI/CD pipelines in TypeScript, whereas JSLog is a playground for code snippets.
- JSLog vs Slides: Slides generates static animated sites; JSLog focuses on interactive code execution.
- JSLog vs zippystarter: Zippystarter creates full blog or portfolio sites, while JSLog is a lightweight code sandbox.
JSLog FAQ
How do I run my code?+
Press Cmd + Enter to execute the current script in the playground.
How can I clear the console output?+
Use the shortcut Cmd + K to clear all console messages.
Is there a way to see available shortcuts?+
Press Cmd + / to display a help overlay with all shortcuts.
Where can I change playground settings?+
Open the settings panel with Cmd + ,.
How can I give feedback?+
You can reach the author on X (Twitter) via the link on the site.
Summarized by DevHunt from jslog.app · Sep 28, 2026. Details may change; check the official site.
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