HTML Viewer with CSS & JS Tabs (Live Preview)
Edit HTML, CSS, and JS in tabs with an instant sandboxed live preview.
Capture real responses from any site with API Inspector
Our free browser extension lists every API request a page makes — JSON, XML, CSV, HTML and media — and opens each one in the right Coders Hub tool with a single click.
About the HTML Viewer with CSS & JS Tabs (Live Preview)
A three-pane HTML/CSS/JS playground: edit each in its own tab and watch a sandboxed iframe preview update on a short debounce (or run manually). Captures console.log/warn/error output from the preview into a panel, and lets you download the combined result as a single .html file or copy each tab individually.
Popular uses
- html preview
- css js editor
- live preview
- codepen alternative
- html sandbox
- web playground
Examples
Button click
XML<button id="btn">Click</button>Output
YAMLconsole: Button clicked!Keyboard shortcuts
- Copy the main outputCtrl / ⌘ + Shift + C
- Download the resultCtrl / ⌘ + S
- Share this toolCtrl / ⌘ + Shift + S
- Reset the inputsAlt + R
- Open the tool search paletteCtrl / ⌘ + K
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Frequently asked questions
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Version 1.0.0 · Updated 2026-08-11 · Runs entirely in your browser