HTML/JS Formatter

This HTML/JS formatter is a focused code hygiene tool that converts irregular markup into clean, readable, standards-compliant code. It analyzes the input as HTML with embedded JavaScript and CSS, preserving comments and string literals while reflowing whitespace, tag nesting, attribute layouts, and formatting tokens to a consistent style. The goal is to reduce manual reformatting during code reviews, educational demonstrations, documentation authoring, and collaborative work where predictable formatting improves comprehension and maintainability without altering the program's behavior. It is designed for developers, editors, instructors, and technical writers who regularly work with sample snippets or mixed web content.
Core logic applies language-aware formatting rules. For HTML, it normalizes indentation, reflows nested elements, and standardizes attribute spacing and quote usage; for embedded JavaScript, it standardizes braces, spacing, and line breaks within functions and blocks; for CSS, it aligns selectors and declarations with consistent separators. The formatter ensures output remains valid in terms of structure and syntax and avoids semantic changes. It operates in a deterministic manner, so repeated runs yield the same results for identical input.
The tool benefits teams and individuals who rely on clean, consistent code in documentation, tutorials, and code reviews. It handles large snippets and mixed content efficiently, flags unparseable segments, and provides a best-effort formatted result while gracefully leaving irreducible portions untouched if necessary. Typical use cases include preparing samples for API docs, converting messy examples from slides into readable blocks, and enforcing internal formatting standards across repositories.
Key differentiators include non-destructive formatting, strict preservation of comments and literals, and optional advanced settings such as indentation size (2 or 4 spaces), line wrapping for long tags, and alignment preferences. These features enable teams to enforce consistent style without requiring an IDE plugin, making it suitable for in-browser usage, script-based workflows, or integration into documentation pipelines.