SQL 포맷터

여러 SQL 방언을 지원하여 SQL 쿼리를 포맷하고 정리합니다.

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About This Tool

The Sql Formatter sql formatter engine - pure functions for sql formatting operations supports multiple sql dialects: standard, mysql, postgresql All processing happens client-side in your browser, ensuring your data remains private and secure. Perfect for developers who need quick, reliable processing without compromising on privacy or security.

How to Use This Tool

Input Your SQL

Paste your SQL code into the input area. The formatter handles minified SQL, inconsistently formatted code, or code with mixed indentation. Load sample data to see formatting in action.

Choose Formatting Style

Select your preferred indentation (2 spaces, 4 spaces, or tabs) and other SQL formatting preferences. The tool applies industry-standard SQL style guidelines but can be customized to match your project's standards.

Copy Formatted Output

Formatted SQL appears instantly in the output panel. Use the "Copy" button for clipboard, or "Download" to save as a file. The formatted SQL is fully functional with dramatically improved readability.

Technical Implementation

This tool is built using modern JavaScript and runs entirely in your web browser. All operations complete in milliseconds for typical inputs, with performance optimized for both speed and accuracy. The implementation is client-side only - your data never leaves your device. The tool works offline once loaded, requires no cookies, and includes no tracking. Supported browsers include Chrome 90+, Firefox 88+, Safari 14+, and Edge 90+. The tool is mobile-responsive and works on tablets and smartphones.

Best Practices & Tips

✓Format SQL before code reviews. Clean, consistently formatted code is easier to review and helps reviewers focus on logic rather than style issues.
✓Use consistent indentation across your team. Choose 2 spaces, 4 spaces, or tabs for SQL and stick with it. This formatter makes it easy to enforce your team's standard.
✓Format minified SQL for debugging. When debugging production issues, format the minified code first to make it human-readable. This tool handles even heavily compressed SQL.
✓Combine with validation. Always validate SQL after formatting to ensure no errors were introduced. Use our SQL validator alongside this formatter.

Troubleshooting Common Issues

Problem: Formatted output has syntax errors

Solution: The formatter preserves your original SQL content exactly - it only changes whitespace and indentation. If output has errors, the input likely had errors. Validate first, then format.

Example: If your minified SQL had missing commas, formatting will make them more visible but won't fix them.

Problem: Indentation doesn't match my preference

Solution: Check the indentation settings (2 spaces, 4 spaces, or tabs). The formatter applies your chosen style consistently throughout the SQL.

Example: If you want 4-space indentation but see 2 spaces, change the setting and re-format.