HTML Formatter

The HTML formatter processes a raw HTML string to produce clean, readable markup. It targets developers, designers, QA engineers, and CMS teams who work with collected or generated HTML and need predictable formatting. It handles HTML5 semantics, void and void-like elements, and embedded scripts and styles without altering their behavior. By applying a consistent policy for indentation, line wrapping, attribute order, and multi-line attributes, the tool produces markup that is easier to review, merge, and reuse. It can be integrated into local editors, CI pipelines, or code-sharing workflows.
Conceptually the formatter operates in three phases: parse, format, and emit. It tokenizes the input into a hierarchical tree, then traverses the tree to apply spacing rules, wrap long attribute lists, and align attributes across sibling elements. It preserves important blocks such as pre, textarea, and code, which require their own whitespace semantics. The output preserves content integrity while presenting a uniform style consistent with team conventions, reducing semantic drift across copies of the same page or component.
Use cases span template development, content migrations, and quality assurance. The tool helps new contributors understand markup structure, speeds up code reviews by eliminating formatting churn, and supports collaboration across environments. Its non-destructive approach means you can format repeatedly without affecting DOM behavior, making it suitable for build scripts and editor plugins.
Core features include adjustable indentation, optional minification, preservation of pre blocks, rules for attribute formatting, and output suitable for pipelines. It generates clean, deterministic markup that reduces diffs in version control and simplifies automated checks in CI. The formatter is designed to be deterministic, with stable outputs given the same input and settings.