These browser-based tools help you read, clean and check markup and data without installing software. Paste your code, review the result, and copy it back into your project. Nothing is executed and no referenced file is fetched.

Use the HTML Formatter to make minified or messy source readable, and the HTML Minifier to remove comments and extra whitespace from a final copy. The HTML Structure Checker flags common problems such as duplicate IDs, images without alt text and form fields without labels. The HTML to Markdown Converter turns common elements into Markdown, and the JSON Formatter and Validator checks syntax and pretty-prints or minifies JSON.

The tools are intentionally lightweight and are not full validators. Always compare the output with your original and test it before it goes live.

Frequently asked questions

Are the HTML tools safe to use on production code?

Use them on a copy. The formatter and minifier are lightweight and are not full HTML parsers, so compare the output with the original and test it in staging before replacing live files.

Do the tools run my scripts or send my code anywhere?

No. Your pasted code is treated as text and processed in your browser. Scripts in the input are not executed and referenced files are not fetched.

Which HTML tool should I use first?

Start with the HTML Structure Checker to catch missing alt text, duplicate IDs and unlabeled form fields. Then use the HTML Formatter to make the source readable, and the HTML Minifier only for the final copy you plan to publish.