SQL Formatter Online — Free SQL Beautifier & Validator

How to SQL Formatter Online

1. 1

   Paste your SQL query into the input area on the left, or upload a .sql file using the upload button.

2. 2

   Select your SQL dialect from the dropdown: Standard SQL, PostgreSQL, MySQL, MariaDB, SQLite, T-SQL, PL/SQL, BigQuery, Redshift, Spark SQL, or Snowflake.

3. 3

   Choose your indentation style — 2 spaces or 4 spaces — and whether to uppercase SQL keywords.

4. 4

   Click the Format button or press ⌘↵ (Mac) / Ctrl+Enter (Windows) to beautify your SQL instantly.

5. 5

   Copy the formatted output with ⌘⇧C, or download it as a .sql file.

SQL Formatter Features

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  Support for 11 SQL dialects: Standard SQL, PostgreSQL, MySQL, MariaDB, SQLite, T-SQL (SQL Server), PL/SQL (Oracle), BigQuery, Amazon Redshift, Spark SQL, and Snowflake.

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  Configurable indentation: 2 spaces or 4 spaces to match your team's coding standards.

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  Keyword uppercasing to enforce consistent ALL-CAPS SQL keywords across your codebase.

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  SQL minifier: collapses formatted SQL to a single line for production use, removing unnecessary whitespace.

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  SQL validator with multi-pass error detection: balanced parentheses and quotes, valid statement keywords, LIMIT/OFFSET type checks, and dialect-level parse validation.

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  Syntax highlighting with color-coded keywords, strings, numbers, and comments.

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  Line numbers in the input panel for easy error location.

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  Shareable URLs: compress your SQL into a gzip URL parameter for sharing with teammates.

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  Works entirely in your browser — no SQL is sent to any server. Your data stays private.

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  Keyboard shortcuts for power users: ⌘⇧F to format, ⌘⇧M to minify, ⌘⇧V to validate.

Supported SQL Dialects

The SQL Formatter supports 11 SQL dialects. Select the right dialect for accurate formatting and keyword recognition.

Standard SQL

ANSI/ISO standard SQL syntax, compatible with most relational databases. Use this as a generic fallback when your specific database isn't listed.

PostgreSQL

Formats PostgreSQL-specific syntax including RETURNING, :: type casts, dollar-quoted strings, LISTEN/NOTIFY, and common table expressions (WITH RECURSIVE).

MySQL

Handles MySQL syntax including backtick-quoted identifiers, AUTO_INCREMENT, ENUM/SET types, and MySQL-specific function names.

MariaDB

MariaDB-specific SQL formatting, including extensions over MySQL such as SEQUENCE objects and ROW_COUNT().

SQLite

SQLite dialect formatting with support for PRAGMA statements, UPSERT syntax (INSERT OR REPLACE), and SQLite type affinity rules.

T-SQL (SQL Server)

Microsoft Transact-SQL formatting for SQL Server and Azure SQL Database, including TOP, GO batch separator, square-bracket identifiers, and TRY/CATCH blocks.

PL/SQL (Oracle)

Oracle PL/SQL formatting with support for ROWNUM, CONNECT BY hierarchical queries, MERGE statements, and stored procedure blocks.

BigQuery

Google BigQuery Standard SQL formatting, including array and struct syntax, QUALIFY clauses, SAFE functions, and partitioned table DDL.

Amazon Redshift

AWS Redshift SQL formatting with support for Redshift-specific distribution keys (DISTKEY), sort keys (SORTKEY), and compression encodings.

Spark SQL

Apache Spark SQL formatting for big data pipelines, including TRANSFORM, LATERAL VIEW EXPLODE, and Delta Lake extensions.

Snowflake

Snowflake SQL formatting with support for semi-structured data functions (PARSE_JSON, FLATTEN), time travel syntax, and Snowpark expressions.

Frequently Asked Questions

Is this SQL formatter free?

Yes, DevFlow SQL Formatter is completely free with no usage limits. All formatting, minification, and validation runs directly in your browser.

Is my SQL data safe?

Your SQL is formatted entirely in your browser using the sql-formatter JavaScript library. No SQL is ever transmitted to a server. Your queries stay on your machine.

What SQL dialects are supported?

We support 11 SQL dialects: Standard SQL, PostgreSQL, MySQL, MariaDB, SQLite, T-SQL (Microsoft SQL Server), PL/SQL (Oracle), Google BigQuery, Amazon Redshift, Apache Spark SQL, and Snowflake.

Can I format SQL with multiple statements?

Yes. The formatter handles multiple SQL statements separated by semicolons. The 'Lines between queries' option controls how much whitespace appears between each statement.

What is SQL minification?

SQL minification collapses a formatted SQL query to a single line by removing all unnecessary whitespace and newlines. Minified SQL is useful for embedding queries in application code, environment variables, or configuration files where readability is less important than compactness.

How does SQL validation work?

The validator runs multiple checks: it verifies balanced parentheses and quotes, checks that each statement begins with a valid DML/DDL keyword (SELECT, INSERT, UPDATE, etc.), validates LIMIT/OFFSET syntax, and attempts a full parse using the sql-formatter library to catch dialect-specific errors.

Can I upload a .sql file?

Yes. Click the upload icon in the input panel header to select a .sql or .txt file from your computer. The file contents are loaded into the input area for formatting.

Does it work offline?

The formatter uses a pure-JavaScript library (sql-formatter) bundled with the page, so once the page has loaded it works without an internet connection.

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