HTML Formatter
Clean up messy HTML markup.
Runs entirely in your browser — your data is never uploaded to any server.
How it works
- Paste your HTMLMinified or hand-edited markup.
- Format itIndentation and wrapping are applied.
- Copy the resultPaste it straight back into your editor.
What this tool does
- Real parser — structure is never mangled
- Configurable indentation and line width
- Handles inline scripts and styles
- Runs locally, so proprietary markup stays private
Frequently Asked Questions
Only whitespace changes, and it is inserted where it is insignificant. Whitespace-sensitive elements such as pre and textarea are left alone.
It formats valid markup. Badly unbalanced tags will produce a parse error rather than a silent guess.
Yes — script and style blocks are formatted with the appropriate parser.
No. Formatting happens in your browser.
Privacy and security
Your input is processed by JavaScript running inside your browser. Nothing you paste is sent over the network, logged, or stored — which is what makes this safe to use with production data. If you want to check this yourself: open your browser’s developer tools, switch to the Network tab, and use the tool — you will see no request carrying your file or input leave the page.