What is a SQL Formatter?
The SQL Formatter is a free online tool that auto-indents and beautifies messy single-line SQL queries into clean, readable format. It applies keyword line breaks, auto-indentation, and syntax highlighting so you can understand even complex queries at a glance.
It supports 6 SQL dialects including MySQL formatter, PostgreSQL formatter, Oracle (PL/SQL), SQL Server (T-SQL), SQLite, and Standard SQL. Features include keyword case conversion, adjustable indentation, SQL minification, and .sql file upload/download.
Key Features
6 SQL Dialects
Select MySQL, PostgreSQL, Oracle, SQL Server, SQLite, or Standard SQL to apply dialect-specific formatting rules.
Syntax Highlighting
Keywords are highlighted in blue, strings in green, numbers in orange, and comments in gray for improved code readability.
Keyword Case & Indentation
Automatically convert SQL keywords like SELECT, FROM to uppercase, and freely adjust indentation size (2/4/8 spaces).
Minify & File Management
Compress formatted SQL into a single line (Minify), or upload/download .sql files for convenient management.
How to Use
- Enter SQL Query — Paste the SQL query you want to format in the left input area, or upload a .sql file.
- Configure Options — Set the SQL Dialect, indent size (2/4/8 spaces), and keyword uppercase conversion.
- Click Format — Click 'Format' to see the syntax-highlighted, formatted result on the right.
- Copy / Save Result — Use 'Copy' to copy to clipboard, or download as a .sql file.
Use Cases
Code Review
Format SQL queries in pull requests so team members can easily understand and review them.
Debugging & Log Analysis
Beautify single-line SQL from logs to quickly identify the root cause of issues.
Learning & Education
Help students and junior developers understand query structure by formatting SQL into readable blocks.
Documentation
Clean up SQL for inclusion in technical documents, database design specs, and reports.
Frequently Asked Questions
What SQL dialects does the formatter support?
It supports standard SQL syntax used in MySQL, PostgreSQL, Oracle, SQL Server, SQLite, and more. It can format SELECT, INSERT, UPDATE, DELETE queries with JOINs and subqueries.
Can I format a single-line SQL from logs?
Yes, paste the single-line SQL query and click 'Format'. Keywords will be separated with line breaks and indentation for easy reading.
Is my SQL sent to any server?
No. All processing happens in your browser. Your SQL is never transmitted to any server.
What does uppercase keywords mean?
It automatically converts SQL keywords (SELECT, FROM, WHERE, etc.) to uppercase. This is a common convention to improve SQL readability.
Can I use it as a MySQL or PostgreSQL formatter?
Yes, it supports 6 SQL dialects: MySQL formatter, PostgreSQL formatter, Oracle, SQL Server (T-SQL), SQLite, and Standard SQL. Select your desired engine from the SQL Dialect dropdown to apply dialect-specific formatting.
Does it work on mobile devices?
Yes, it is fully responsive and works on smartphones and tablets. On mobile, the input and output panels stack vertically for comfortable touch-based SQL formatting.
Privacy Notice
All processing in the SQL Formatter happens entirely in your browser. Your SQL queries are never sent to any server. Feel free to use it with work queries or SQL containing sensitive data.
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