1Choose HTML, CSS, or JavaScript, then paste the code into the input editor. JavaScript mode also accepts JSX syntax.
2Select two-space, four-space, or tab indentation. For JavaScript and CSS, you can also choose semicolon and single-quote preferences.
3Select Format to structure the code, then review and copy the output. If the selected parser detects a syntax error, the tool displays the error instead of returning incomplete output.
Common use cases
✓Make minified HTML markup readable while inspecting a page structure.
✓Clean up compact CSS rules before debugging layout and responsive styles.
✓Format JavaScript snippets copied from browser sources, logs, or examples.
