SQL Formatter
Paste messy SQL and get clean, properly indented output. Supports Standard SQL, MySQL, PostgreSQL, T-SQL, and PL/SQL. Configurable indentation and uppercase keywords.
How to Use the SQL Formatter
- Paste your SQL query into the input area
- Select your SQL dialect (Standard, MySQL, PostgreSQL, T-SQL, PL/SQL)
- Click Format to beautify with proper indentation
- Toggle uppercase keywords on or off
- Copy the formatted output
What Is SQL Formatting?
SQL formatting transforms raw, compressed, or inconsistently styled SQL queries into clean, readable code with proper indentation and keyword placement. Well-formatted SQL is essential for teams that collaborate on database logic, making queries easier to scan, debug, and maintain.
Different SQL dialects such as MySQL, PostgreSQL, SQL Server, and SQLite each have unique syntax extensions. A good formatter respects these dialect differences while applying consistent style rules like uppercase keywords, aligned columns, and indented subqueries. Readable SQL reduces errors and speeds up code reviews significantly.
Common Use Cases
Code Reviews
Format messy SQL before submitting pull requests so reviewers can focus on logic rather than deciphering dense one-line queries.
Debugging Complex Queries
Break apart deeply nested joins and subqueries into readable blocks to quickly isolate the clause causing unexpected results.
Technical Documentation
Produce consistently styled SQL examples for internal wikis, API docs, or onboarding guides that new team members can follow.
Learning SQL
Visualize query structure with proper indentation to understand how SELECT, JOIN, WHERE, and GROUP BY clauses relate to each other.
SQL Formatting Best Practices
Consistent Keyword Casing
Choose uppercase or lowercase for SQL keywords and stick with it across your entire codebase to maintain a uniform style.
Indent Subqueries
Nest subqueries one level deeper than the parent query so readers can instantly distinguish between outer and inner logic.
Use Meaningful Table Aliases
Replace generic aliases like a, b, c with descriptive short names like ord, cust, or prod for self-documenting queries.
Break Long WHERE Clauses
Place each condition on its own line with the AND or OR operator aligned vertically to improve scannability of filter logic.