HTML tools
Automatic beautification waits 350 ms; minification is explicit. Select a structure notice to return to its original line.
Your HTML stays in this browser tab. Static preview blocks scripts and outside resources.
Paste HTML or load the example.
When a CMS export arrives as a single line, finding the element behind a broken section takes too long. This HTML formatter separates structural tags while keeping inline wording and protected blocks intact.
It also gives you a parsed tag outline and source positions. Use those clues to investigate suspicious nesting before moving the source into your editor or a dedicated standards checker.
A dense fragment becomes an indented outline. The HTML formatter keeps adjacent inline words, comments and the contents of pre, textarea, script and style blocks as supplied.
The HTML formatter opens a separate static frame only for the current result. Scripts, forms and outside resources cannot run inside that preview.
Example replaces the input only after a preview showing the character count; one Undo restores both input and result. Pasting your own HTML never silently overwrites it.
Automatic beautification waits 350 ms after an edit. Turn it off for Ctrl/Cmd+Enter; compression is always an explicit action from the original source.
A structure row or diagnostic jumps to its original line. Check the byte comparison and render the isolated preview if useful; a clean list is not standards certification.
Adds line breaks between structural tags but does not split inline wording or rewrite attributes.
Removes structural spacing and reports UTF-8 bytes before and after; ordinary comments and embedded code remain.
Shows the HTML5 parser’s element hierarchy, including browser-inserted nodes, and lets you return to a source line.
A separate sandboxed frame strips active elements and blocks outside loads; preview stays off until you select it.
Usually only layout between structural tags changes, but CSS can make whitespace significant. Inline text and preformatted blocks stay literal; compare the output in the actual page.
The HTML5 parser can recover enough to display a structure. Diagnostics flag located parser issues and likely unclosed tags; they do not repair the source.
An HTML beautifier improves readability, while a validator checks conformance. This HTML formatter gives only a bounded structure check; use a dedicated checker for a standards verdict.
No. HTML whitespace can become text. Compact mode changes only structural gaps and tag spacing outside quotes, keeps comments, and leaves inline gaps alone.
No. Parsing and formatting run in this browser tab. Static preview is opt-in, isolated and barred from external requests.
Found an unexpected result?
Paste a CMS export or load the example, inspect the structure, then copy the current result.