SQL Formatter

An SQL Formatter takes a SQL query — whether it's a single-line mess of concatenated clauses or a 500-line stored procedure — and reformats it with consistent indentation, keyword capitalisation, and line breaks that make the query's logical structure visible at a glance. Every developer and data analyst who works with databases has encountered a raw SQL query so densely packed that tracing the JOIN conditions or subquery nesting requires significant mental effort. A formatter eliminates that friction.

SQL is also notoriously inconsistent in how different people write it: select * from users where id = 1 and SELECT * FROM users WHERE id = 1 are functionally identical but stylistically worlds apart. Teams often maintain style guides specifying that keywords be uppercased, that each clause start on a new line, and that indentation reflect nesting depth. Manually applying these rules to a 200-line query is tedious; the formatter handles it instantly.

Why formatted SQL matters beyond aesthetics

Debugging complex queries: A four-table JOIN spread across one line is nearly impossible to debug. Formatted over multiple lines, the relationship between each JOIN condition becomes clear. You can immediately see which table is being joined on which column, where filters are applied, and how subqueries relate to the outer query.

Code review: Reviewing a pull request that includes raw SQL changes is much harder than reviewing well-formatted SQL. Formatted queries make it immediately obvious what was changed, which conditions were added, and whether any security-sensitive clauses (like missing WHERE in an UPDATE) were accidentally omitted.

Performance analysis: When examining query execution plans in PostgreSQL's EXPLAIN ANALYZE, MySQL's SHOW EXPLAIN, or SQL Server's Query Execution Plan, understanding the query structure is prerequisite to understanding why a particular index scan or hash join was chosen.

Documentation: SQL queries embedded in technical documentation, runbooks, or README files should be formatted so readers can follow the logic without running them.

Supported dialects

The UtilsGo SQL Formatter handles standard SQL (ANSI/ISO SQL-92) and common extensions used by MySQL, PostgreSQL, SQLite, SQL Server (T-SQL), and Oracle (PL/SQL). Common keywords, functions, and window function syntax are all recognised and properly indented. All formatting runs locally in your browser — your database queries and schema information never leave your device.