Ctrl+Enter to run
Output appears here
Use console.log, console.warn, and other console methods. The last expression value is shown when your script returns one.
JS Editor
Write JavaScript, run it locally, and inspect console output. Nothing is uploaded or stored.
About JS Editor
A lightweight JavaScript playground that runs your code in the browser and captures console output. Prototype snippets, test logic, and learn without any setup.
Features
- Run JavaScript instantly in the browser
- Capture console.log and error output
- Return the last expression automatically
- No setup, accounts, or uploads
How to use
- 1Write or paste JavaScript into the editor.
- 2Run the code to execute it locally.
- 3Read the console output and return value.
Frequently Asked Questions
Where does the code run?
Your code runs entirely in your browser. Nothing is sent to a server.
Can I use modern JavaScript?
Yes. Modern syntax supported by your browser's engine will run as expected.
Is network or file access available?
The playground focuses on safe, local execution and does not provide server or file system access.
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