JavaScript Formatter

This tool formats JavaScript source code to a consistent style using a configurable rule set. It targets individual developers, teams enforcing shared code style guides, educators creating teaching materials, and code reviewers seeking readable diffs. Given raw JavaScript, it outputs a standardized, well-formatted version that improves readability, reduces cognitive load during reviews, and helps maintain uniform code across projects with minimal manual edits.
Conceptually, formatting proceeds by parsing the input into a safe internal representation (AST or token stream) and re-emitting code according to the selected rules. Supported options include indentation (spaces or tabs and size), semicolon usage, quotes (single or double), trailing comma policy, and a maximum line length. The tool aims to be deterministic: the same input and settings produce the same output. It preserves comments and template literals where safe to avoid altering intent.
Unique value lies in in-browser operation, speed, and explicit control over style without performing linting or semantic analysis. Typical use cases include preparing code for pull requests, teaching style guidelines, refactoring sessions, and onboarding new contributors. It differentiates itself from generic beautifiers by combining a clear rule set with predictable results and easy export of formatted code for CI pipelines or editors.