Free Online SQL Formatter & Prettifier
Paste a raw SQL query to instantly format it with clean indentation and consistent keyword casing, across ANSI SQL, MySQL, or PostgreSQL syntax. It is useful for database developers, analysts, and reviewers who need a readable SQL query before troubleshooting joins or sharing a migration.
Why format SQL?
SQL written on a single line, or with inconsistent indentation and keyword casing, is hard to review and easy to introduce bugs into — a misplaced condition in a dense WHERE clause is a common source of subtle query bugs. Consistent formatting makes clauses, joins, and conditions visually distinct, which matters both for your own review and for code review by teammates.
How to use this formatter
Paste your raw SQL, choose the dialect that matches your database (ANSI SQL for a generic/standard query, or MySQL/PostgreSQL if you're using dialect-specific syntax), and click Format. Keywords are uppercased and each clause (SELECT, FROM, WHERE, ORDER BY, and so on) starts on its own line with consistent indentation.
Why the dialect setting matters
SQL dialects differ in identifier quoting (MySQL's backticks vs. PostgreSQL's double quotes), available functions, and syntax extensions (like PostgreSQL's JSONB operators). Picking the correct dialect means the formatter's parser correctly recognizes dialect-specific syntax instead of misreading it as a syntax error.
How to use SQL Formatter for related tasks
Paste the query, choose the relevant dialect when available, and format SQL before checking it manually for semantic issues.
Related tools: JSON Beautifier, Code Diff Checker.
Frequently asked questions
Is my SQL query uploaded anywhere?
No — formatting happens entirely in your browser. Nothing you paste, including table or column names from a real schema, is ever sent to a server.
Why does the dialect (ANSI, MySQL, PostgreSQL) matter?
Each database has its own SQL extensions and quoting conventions — MySQL uses backticks for identifiers, PostgreSQL supports things like JSONB operators, and picking the right dialect means the formatter correctly recognizes dialect-specific syntax instead of misreading it as an error.
Does formatting change what my query does?
No — formatting only changes whitespace, indentation, and keyword casing for readability. The query logic, table names, and values are never altered.
What happens if my SQL has a syntax error?
The formatter reports a parse error indicating roughly where it stopped being able to understand the query, instead of silently producing a mangled result.
Can formatting SQL fix a broken query?
Formatting improves readability but cannot correct every semantic or database-specific error; use the formatted query to find those problems faster.