SQL Formatter

About this tool

SQL (Structured Query Language) is the standard language for querying and manipulating relational databases (PostgreSQL, MySQL, SQLite, SQL Server, Oracle). Production SQL—especially queries generated by ORMs or copied from monitoring tools—is often written as a single long line with no indentation. A SQL formatter applies consistent indentation, capitalizes keywords (SELECT, FROM, WHERE, JOIN), and aligns clauses so the logical structure is immediately visible. Formatted SQL is easier to read, review, and debug. This tool formats SQL in your browser—no server upload required.

How to use

1. 1Paste your SQL query into the input field.
2. 2Click "Format" — the query is re-indented with uppercase keywords and clean clause alignment.
3. 3Use "Minify" to collapse the query to a single line.
4. 4Click "Copy" to copy the formatted result to your clipboard.

Frequently asked questions

Does formatting change what the query does?

No. SQL formatting only changes whitespace and letter casing for keywords. The query's logic, performance, and result are identical before and after formatting.

Why are SQL keywords written in uppercase?

Uppercase keywords (SELECT, FROM, WHERE) is a long-standing convention that visually separates language keywords from user-defined identifiers (table and column names). Most SQL is case-insensitive for keywords, so it is a style choice, not a requirement.

Does this tool support all SQL dialects?

The formatter handles standard ANSI SQL and common features from PostgreSQL, MySQL, and SQL Server. Highly vendor-specific syntax—like PostgreSQL dollar-quoting or SQL Server square-bracket identifiers—may not format perfectly.

What should I do before running a formatted query in production?

Always verify the formatted output matches the original logic—particularly check operator precedence in WHERE clauses and JOIN conditions. Formatting tools are not query validators; use EXPLAIN or your database's query planner to analyze performance.