Web Sandbox - Realtime HTML, CSS, JS Playground & Editor
What is Web Sandbox?
Our Web Sandbox is a client-side frontend playground where you can write HTML structure, define CSS styles (supporting animations & transitions), and write JavaScript code to create interactive web widgets. The code compiles in real-time and runs inside a secure, isolated sandboxed iframe directly in your browser. No server connection is required, keeping your development fully private, secure, and fast.
Key Advantages of Client-Side Web Sandbox
- •100% Client-Side: Everything runs locally on your browser. Your code is never sent to our servers.
- •Completely Secure Sandbox: The output iframe runs with strict sandbox restrictions (`allow-scripts`), isolating your code from the main website context.
- •Integrated Live Console: Capture all `console.log`, `console.warn`, and `console.error` outputs directly inside our custom Console panel.
- •Instant Templates: Load pre-configured interactive prototypes (Counters, Clock, CSS animations) instantly with a single click.
- •Auto & Manual Run: Live update automatically as you type (debounced) or trigger runs manually.
How to use Web Sandbox
- Step 1: Select a layout template from the dropdown menu to get started, or write your own custom code.
- Step 2: Switch between the HTML, CSS, and JS tabs in the editor panel to write your code.
- Step 3: Toggle 'Auto-Run' to see updates immediately on the preview pane, or press 'Run' manually.
- Step 4: Check the 'Console' tab to monitor logs and errors emitted by your JavaScript code.
- Step 5: Copy code fragments or download the compiled standalone HTML file instantly.
Thank you for prototyping with Any Free Online Web Tools! Enjoy safe and instant coding.