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Free online SQL formatter — format and minify SQL queries for better readability. Supports MySQL, PostgreSQL, SQLite and major SQL dialects.
SQL (Structured Query Language) is the standard language for managing relational databases. Well-formatted SQL queries are easier to read, debug, and maintain. A consistent formatting style is especially important in team environments where multiple developers work with the same queries and codebase.
Formatted SQL uses consistent indentation, line breaks, and casing to make the query structure visually clear. Keywords like SELECT, FROM, WHERE, JOIN are typically capitalized. Column lists are indented and often placed on separate lines. Subqueries and JOIN conditions are indented to show their nesting level.
Minified SQL removes all unnecessary whitespace — useful for reducing query size in application code, logging, or when sharing queries in constrained environments like chat messages. However, minified queries should never be used for development or debugging since they sacrifice readability.
Good SQL formatting practices include: capitalizing SQL keywords, putting each major clause on a new line, indenting column lists and conditions, using meaningful table aliases, and keeping line length reasonable. Consistent formatting makes code reviews easier and helps catch logical errors.
This formatter supports standard SQL syntax and can handle complex queries with JOINs, subqueries, CTEs (WITH clauses), window functions, and aggregations. It uses the sql-formatter library which is compatible with MySQL, PostgreSQL, SQLite, and other major database dialects.
No. Formatting only changes whitespace and casing — the database parses the same query structure regardless. However, well-formatted queries are easier to optimize because the logic is clearer to the developer.
There is no single best style — consistency matters more than specific rules. Popular styles include: Allman (keywords on their own line), compact (shorter queries fit in fewer lines), and tabular (aligning similar elements vertically). Pick one style and use it consistently.
This tool focuses on SQL query formatting (SELECT, INSERT, UPDATE, DELETE, CREATE TABLE). For formatting full stored procedures with PL/SQL or T-SQL blocks, consider a more specialized SQL formatter.