SQL Prettifier & Case Converter
Format messy SQL queries and switch between UPPERCASE and lowercase keyword styles. Supports multiple SQL dialects.
Last updated: April 2026
Professional SQL Formatting for Database Developers
Writing complex SQL queries can quickly lead to messy, unreadable code. Whether you're debugging a stored procedure or optimizing a JOIN-heavy SELECT statement, having a clean, well-formatted query is essential for identifying logical errors and maintaining codebases.
Key Features of our SQL Prettifier
- Multi-Dialect Support: Tailor the formatting logic to MySQL, PostgreSQL, Oracle, and more.
- Keyword Casing: Instantly switch between
UPPERCASEandlowercasekeywords to match your team's style guide. - Intelligent Indentation: Automatically aligns clauses, subqueries, and JOIN statements for maximum clarity.
- Privacy-First: Zero server-side processing ensures your proprietary queries remain secure.
Benefits of Clean SQL Code
Readable SQL isn't just about aesthetics; it's about productivity. A well-formatted query allows developers to scan for column names, filter conditions, and grouping logic in seconds. It also makes code reviews more efficient and reduces the risk of accidental data modifications caused by misunderstood query logic.
How to Use the Case Converter
- Paste your SQL: Enter your raw query into the editor.
- Select Case: Use the Case toggle to choose between Upper and Lower.
- Pick Dialect: Choose your database type (e.g., MySQL) for dialect-specific formatting.
- Format: Click the Wand icon to instantly transform your code.
Frequently Asked Questions
What is SQL Prettifying?
SQL Prettifying (or beautifying) is the process of taking raw, unformatted SQL code—which often lacks indentation and consistent casing—and transforming it into a clean, readable structure with standardized line breaks and keyword casing.
Which SQL dialects are supported?
Our formatter supports a wide range of dialects including Standard SQL, MySQL, PostgreSQL, MariaDB, Oracle PL/SQL, and T-SQL (SQL Server). Selecting the correct dialect ensures that specific syntax quirks and keywords are handled correctly.
Why should I convert keyword case?
Consistency is key in database development. Some teams prefer all-caps keywords (SELECT, FROM) for visibility, while others prefer lowercase for a modern feel. Our tool allows you to instantly toggle between these styles across your entire query.
Is my database data safe?
Absolutely. Like all tools on devtoolspack, the SQL formatting happens entirely in your browser. Your queries are never sent to a server, keeping your schema and data structure 100% private.
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