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HTML Formatter

Indent bounded static HTML locally without rendering it or executing scripts.

Inert markup layout75 chars
Text only · never executed or rendered
The formatter preserves strings and comments as text.
Formatted HTML preview Ready
99 output chars
<main>
  <h1>
    Toolbox
  </h1>
  <p data-local="true">
    Format static markup.
  </p>
</main>
Processed on your device

How it works & useful details

Static markup, kept inert

Use this for static HTML tags, attributes, comments, and a doctype. The workspace shows markup as text only; it never renders tags or follows resources.

Tag spelling and attribute text are copied intact while nesting receives indentation. Script and style blocks are refused rather than being guessed as ordinary markup, and malformed/mismatched tags receive a local error.

Private, bounded text processing

Code and markup stay as inert text in this browser. These tools do not execute JavaScript, render HTML, load URLs, install packages, contact registries, or save what you paste.

Regex patterns are limited to 500 characters and test text to 20,000 characters. Formatters and package inspection accept up to 100,000 characters; exports are capped at 200,000 characters.