SQLフォーマッター
SQLクエリのフォーマットと整形
使い方
テキストを貼り付けまたは入力
テキスト、コード、またはデータを入力エリアに入力します。
オプションを選択
適用する変換やフォーマットを選択します。
結果をコピー
ワンクリックで出力をクリップボードにコピーします。
このツールを使う理由
完全無料
隠れたコストもプレミアムプランもありません — すべての機能が無料です。
インストール不要
すべてブラウザで実行されます。ソフトウェアのダウンロードやインストールは不要です。
プライベート＆安全
データはデバイスの外に出ることはありません。サーバーにアップロードされることはありません。
モバイル対応
完全レスポンシブ対応 — スマートフォン、タブレット、デスクトップで利用できます。
SQL Formatting Best Practices for Readable Queries
Key Takeaways
- Properly formatted SQL queries are easier to review, debug, and maintain across development teams.
- Consistent SQL style reduces code review friction and helps catch logical errors in complex joins and subqueries.
- Your SQL queries are formatted entirely in the browser — no data is sent to external servers.
SQL remains the backbone of data operations for relational databases worldwide. As queries grow in complexity with multiple joins, subqueries, and conditional logic, proper formatting becomes essential for maintainability. Automated SQL formatting ensures consistent style across teams and makes complex queries immediately understandable.
Complex SQL queries with poor formatting take up to 3x longer to debug than well-formatted equivalents.
Developer Productivity
Common Use Cases
Code Review Preparation
Format SQL queries before submitting pull requests to ensure reviewers can quickly understand query logic and join conditions.
Legacy Query Cleanup
Reformat inherited SQL code from legacy systems where inconsistent formatting makes understanding query intent difficult.
Log Analysis
Format SQL queries extracted from application logs or slow query reports to analyze performance bottlenecks.
Documentation Generation
Produce cleanly formatted SQL examples for technical documentation, wiki pages, and team onboarding materials.
Pro Tips
Place each major clause (SELECT, FROM, WHERE, JOIN, ORDER BY) on its own line for maximum readability.
Use uppercase for SQL keywords and lowercase for column and table names to visually distinguish syntax from data.
Indent subqueries and CASE expressions to clearly show nesting levels and logical grouping.
Add line breaks after commas in SELECT lists when you have more than three columns to keep lines manageable.
All SQL formatting is performed entirely in your browser. Your queries, which may contain sensitive table names, column references, or business logic, are never transmitted to any external server.