What is SQL Formatter?
SQL Formatter is a tool that takes raw, unformatted SQL queries and restructures them with proper indentation, line breaks, and consistent keyword casing. Readable SQL is easier to debug, review in pull requests, and maintain over time. Whether you are writing a quick ad-hoc query or refactoring a complex stored procedure, formatting your SQL consistently reduces errors and makes collaboration smoother across development teams.
How to Use This Tool
Select your SQL dialect from the dropdown menu (SQL, MySQL, PostgreSQL, SQLite, TSQL, or MariaDB). Paste your SQL query into the input area, then click "Format" to beautify it with proper indentation and uppercase keywords. If you need a compact version for embedding in code or configuration files, click "Minify" to compress the query onto a single line. Use the copy button to grab the result, or click "Clear" to start fresh.
Common Use Cases
- Cleaning up auto-generated SQL from ORMs, query builders, or database export tools
- Preparing SQL for code reviews, documentation, or technical blog posts
- Debugging complex queries with multiple JOINs, subqueries, and CTEs
- Minifying SQL for use in application code strings or API payloads where compact format is preferred
Why Use a Client-Side SQL Formatter?
SQL queries often contain sensitive information such as table names, column structures, business logic, and sometimes even data values in WHERE clauses. Sending these queries to a remote server for formatting exposes your database schema to third parties. This tool processes everything locally in your browser. No SQL is transmitted over the network, making it safe for use with production queries, proprietary schemas, and confidential database structures.
Frequently Asked Questions
Which SQL dialects are supported?
This formatter supports standard SQL, MySQL, PostgreSQL, SQLite, T-SQL (Microsoft SQL Server), and MariaDB. Each dialect handles syntax differences like backtick quoting in MySQL, double-dollar strings in PostgreSQL, and square bracket identifiers in T-SQL. Selecting the correct dialect ensures your keywords, functions, and syntax are formatted accurately.
Does formatting change how my SQL query executes?
No. SQL formatting only changes whitespace, line breaks, and keyword casing. It does not alter the logical structure, execution plan, or results of your query. The database engine ignores extra whitespace, so a formatted query and a minified query produce identical results. Formatting is purely a readability improvement for human developers.
Can I format stored procedures and DDL statements?
Yes. The formatter handles all standard SQL statement types including SELECT, INSERT, UPDATE, DELETE, CREATE TABLE, ALTER TABLE, and stored procedure definitions. Complex statements with CTEs (WITH clauses), window functions, and nested subqueries are also supported. For best results, select the dialect that matches your database system.