SQL Formatter & Beautifier
Paste your SQL and get it formatted instantly. Supports MySQL, PostgreSQL, SQLite, T-SQL and more. Uppercase keywords, configurable indentation and minify in one click. Everything runs in your browser — nothing is sent to any server.
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Frequently Asked Questions
What is the difference between SQL dialects and why does it matter for formatting?▾
SQL has a standard (ISO/ANSI SQL) but every database engine extends it with proprietary syntax. MySQL uses backtick identifiers and LIMIT/OFFSET; PostgreSQL uses double-quote identifiers and FETCH FIRST; T-SQL (SQL Server) uses square bracket identifiers and TOP; BigQuery uses backticks with its own DATE/ARRAY functions. A formatter that doesn't understand the dialect may incorrectly break or join tokens — for example, treating a PostgreSQL-specific :: cast operator as a syntax error. Always select your target dialect for accurate formatting.
Should SQL keywords be uppercase, and does it affect query execution?▾
SQL keywords are case-insensitive in all major databases — SELECT and select execute identically. Uppercase keywords are a widely adopted convention because they visually distinguish reserved words from table and column names, making queries easier to scan. Some style guides (Google SQL, Airbnb) mandate uppercase; others (Ruby on Rails) prefer lowercase. The formatting choice is purely cosmetic and has zero effect on query performance or correctness.
Can a SQL formatter fix syntax errors in my query?▾
No. A formatter only restructures whitespace and indentation — it does not validate or fix SQL logic. If your query has a missing comma, an unclosed parenthesis, or a misspelled keyword, the formatter will either pass through the error unchanged or fail to format. For syntax validation, run the query against your actual database with EXPLAIN (PostgreSQL/MySQL) or SET NOEXEC ON (SQL Server) to catch errors without executing the query.
Why does my formatted SQL look different across different tools?▾
There is no single agreed-upon SQL formatting standard. Different tools make different choices about: where to place JOIN conditions (same line or new line), how to indent subqueries, whether to put commas at the start or end of lines, how to handle long IN() lists, and how to break complex CASE expressions. Tools like sql-formatter, pgFormatter, and SQLFluff all produce valid but differently styled output. The important thing is consistency within a codebase — pick one tool and use it everywhere.
What is SQL minification and when would I use it?▾
SQL minification strips all non-significant whitespace and newlines, reducing a formatted multi-line query to a single line. It is useful when embedding SQL in application code strings, sending queries via APIs where payload size matters, or storing queries in configuration files. Unlike CSS or JavaScript minification, SQL minification rarely saves meaningful amounts of data since queries are typically short. The main practical use is making a query easier to log on a single line or embed inline without heredoc syntax.