Online MySQL Formatter

The Online MySQL Formatter provides deterministic, readable SQL formatting for MySQL queries. Target users include database developers, DBAs, and data engineers who share code through repositories or PRs. It takes a raw SQL string and outputs a consistently styled version that reduces noise in diffs and speeds review. The formatter respects MySQL-specific syntax, including backtick-quoted identifiers, inline comments, and typical DDL/DML constructs. It does not run queries or validate semantics; it only formats presentation.
Conceptually, the tool tokenizes the input, recognizes keywords, operators, literals, and comments, then applies style options such as indentation, line wrapping, and keyword casing. Options include indent_style (spaces or tabs), indent_size (1–8), keyword_case (None, Upper, Lower), max_line_length (40–200), and reformat_comments. The output is a new SQL text with the chosen style, plus optional metadata like line_count and byte_size. It handles edge cases such as long lines by wrapping at the requested limit and preserving comments in their intended positions.
The primary value is consistency across teams and environments, reducing churn when reviewing SQL in code reviews, migrations, or documentation. It supports standard MySQL dialect features and works well with common schemas that use backticks for identifiers. Common use cases include preparing queries for version control, generating readable queries for learning or onboarding, and ensuring that automated tooling can compare formatted outputs reliably. It is not a validator or executor; for correctness, rely on separate SQL validation tooling.
Unique differentiators include dialect-aware formatting, configurable keyword casing, and neutral semantic risk, ensuring stable, readable outputs across large projects.