UFOZoo

SQL Formatter — MySQL, PostgreSQL & SQL Server Beautifier

Format and beautify SQL queries for MySQL, PostgreSQL, SQL Server, Oracle, SQLite, and 15+ dialects. Features keyword case conversion and syntax highlighting.

Features

  • ✓Real-time SQL formatting as you type — paste and it formats instantly with proper indentation and line breaks
  • ✓Support for 13+ SQL dialects including MySQL, PostgreSQL, SQL Server, Oracle, SQLite, BigQuery, Snowflake, and Spark SQL
  • ✓Keyword case conversion — automatically convert keywords to UPPER, lower, or preserve original casing to match your team's coding standards
  • ✓Syntax highlighting with color-coded keywords (blue), strings (green), numbers (amber), operators (red), identifiers (purple), and comments (gray)
  • ✓Customizable indentation — choose 2 spaces, 4 spaces, or tab to match your project's style guide
  • ✓One-click minification — compress SQL queries by removing unnecessary whitespace for production use or reducing payload size
  • ✓Instant SQL validation with error detection and line positioning when syntax errors are found
  • ✓Statistics panel showing query size reduction percentage, keyword count, and table references for optimization insights
  • ✓Drag-and-drop .sql files or click to browse — supports any SQL file format
  • ✓One-click copy to clipboard or save formatted output as .sql file for easy sharing
  • ✓Entirely client-side processing — zero data transmission, works offline after initial load, perfect for sensitive database queries
  • ✓Smart dialect detection with automatic formatting adjustments for database-specific syntax differences

How to Use

  1. 1Paste your SQL query into the left editor — it formats automatically as you type. Or drag a .sql file onto the page.
  2. 2Select your SQL dialect from the dropdown (Standard SQL, MySQL, PostgreSQL, Oracle, etc.) to enable dialect-specific formatting rules.
  3. 3Choose keyword case style: UPPER converts all keywords like SELECT/FROM/WHERE to uppercase; lower converts them to lowercase; Preserve keeps original casing.
  4. 4Click indent buttons (2 / 4 / ⇥) to change spacing. Most teams use 2 spaces for SQL.
  5. 5Switch between Formatted view (pretty-printed with syntax highlighting), Minified (compressed single-line), or Stats (query analysis) using tabs.
  6. 6When validation fails, error details show below with line number — fix syntax issues in the left panel.
  7. 7Click Copy or Download on the right toolbar to save your formatted SQL query.
  8. 8Check the Stats tab to see query size reduction, keyword count, and table references for optimization insights.
  9. 9Use the Upload button to load a .sql file from your device, or drag and drop it directly onto the input panel.

Frequently Asked Questions

What is SQL formatting?

∨
SQL formatting (also called beautifying or pretty-printing) adds proper indentation, line breaks, and consistent spacing to messy SQL queries. This makes complex queries readable, easier to debug, simpler to review in code reviews, and faster to understand when maintaining legacy code. Most ORMs and query builders produce minified SQL — this tool reverses that so you can actually read and optimize it.

Which SQL databases are supported?

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We support 13+ major SQL dialects including Standard SQL, MySQL, MariaDB, PostgreSQL, Microsoft SQL Server (T-SQL), Oracle PL/SQL, SQLite, Google BigQuery, IBM DB2, Apache Hive, Amazon Redshift, Snowflake, and Apache Spark SQL. Each dialect has specific formatting rules — for example, PostgreSQL uses double quotes for identifiers while MySQL uses backticks. Select your dialect from the dropdown for accurate formatting.

Is my SQL data sent to a server?

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No. Every operation happens entirely in your browser using JavaScript. Your SQL queries never leave your device, are never transmitted over the network, and are never stored anywhere. This is critical for database security — you can safely format production queries containing sensitive table names, column names, or WHERE clauses without risk of exposure. You can even disconnect from the internet after loading the page.

What does keyword case conversion do?

∨
Keyword case conversion changes how SQL keywords appear in your output. UPPER (most common) converts SELECT, FROM, WHERE, JOIN to uppercase for maximum readability. lower converts everything to lowercase if your team prefers that style. Preserve keeps the original casing exactly as you typed it. This helps enforce consistent coding standards across your team's SQL codebase.

What's the difference between Format and Minify?

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Format (or beautify) expands SQL with proper indentation, line breaks after clauses (SELECT, FROM, WHERE, JOIN), and consistent spacing around operators — use this for development, debugging, documentation, or code reviews. Minify removes all unnecessary whitespace to produce a compact single-line query — use this for embedding SQL in application logs, reducing storage space, or minimizing API payloads where every byte counts.

Does this validate my SQL syntax?

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Yes. The formatter includes basic syntax validation that checks for common errors like mismatched parentheses, missing semicolons, invalid keywords, and unclosed string literals. When an error is detected, it shows the error message and approximate line position. Note: This validates formatting syntax only — it doesn't check if tables/columns exist or execute the query against a real database.

How do I copy the formatted SQL?

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Click the Copy button on the right toolbar to copy the entire formatted output to your clipboard. You can also click Download to save it as a .sql file. Both work instantly — no waiting, no popups, no registration required.

Can I format stored procedures or multiple statements?

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Yes. The formatter handles multi-statement SQL files including CREATE TABLE, INSERT INTO, UPDATE, DELETE, stored procedures (CREATE PROCEDURE), functions (CREATE FUNCTION), triggers, and complex scripts with BEGIN/END blocks. Simply paste your entire .sql file and it will format each statement correctly according to your selected dialect's conventions.

Is there a file size limit?

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The practical limit depends on your device's available memory. Most SQL files under 1-5 MB work smoothly in modern browsers (that's thousands of lines of queries). Extremely large dump files (50+ MB export files) may cause sluggishness due to browser rendering limits. For those cases, use a command-line tool like `sqlformat` (Python) or your database client's built-in formatter instead.

Can I use this on mobile devices?

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Yes. The layout automatically adapts to smaller screens — input and output panels stack vertically on phones and tablets. All features including dialect selection, keyword case switching, indentation control, syntax highlighting, copy, save, and drag-and-drop work on touch screens. Perfect for quickly checking SQL queries on the go during debugging sessions.

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