OCaml Formatter

The OCaml Formatter Online provides deterministic formatting of OCaml source code. It parses OCaml syntax to an intermediate representation and applies a consistent set of rules to reorder line breaks, adjust indentation, and align long expressions. The tool is designed for developers who need uniform style across modules, libraries, and teams. By offering configurable options such as maximum line length and indentation size, it supports project specific style guides while preserving code semantics. The formatter focuses on readability and maintainability, producing outputs that are stable under repeated formatting runs (idempotence). It is suitable for use before commits, during code reviews, and for preparing shareable samples. Core differentiators include an AST based approach, token aware line wrapping, and robust handling of OCaml constructs like let bindings, pattern matching, and pipe operators. Use cases include aligning function applications, formatting nested expressions, and ensuring consistent comment placement relative to code blocks. The tool does not perform type checking or code execution; it strictly reformats source text. It also provides diagnostic data when formatting cannot be applied due to syntax errors or unsupported constructs, enabling developers to correct input without ambiguity. Overall, teams gain predictable formatting, reduced review time, and improved code consistency without manual edits.