Developer & Data

HTML Sandbox Preview

Format, inspect, or convert common developer data directly in your browser. HTML Sandbox Preview is available without an account.

№ 022Runs locally

What this tool does

HTML Sandbox Preview. It works with structured developer content such as JSON, CSV, XML, YAML, TOML, SQL, CSS, JavaScript, URLs and Base64, according to the operation in the title.

When to use it

Use it to check a small HTML snippet without creating a project or publishing it.

How to use

  1. Paste or type the source content into the input field. Start with the sample if you want to see the expected format.
  2. Choose a mode, format, path, pattern or other option shown for this tool; leave unrelated options at their defaults.
  3. Run the operation. If validation reports an error, correct the input and run it again.
  4. Review the output, then copy it or download it when those actions are available.

Tool-specific tip: Enter HTML in the editor and run or preview it in the isolated preview area.

Your input and files are processed in this browser. They are not uploaded by this toolbox.