Which SQL dialects does this formatter support?

Four dialects: Standard SQL, MySQL, PostgreSQL, and T-SQL (Microsoft SQL Server). Each dialect uses its own keyword list and quoting rules for accurate formatting. All processing runs in your browser using the sql-formatter library.

Is my SQL sent to a server?

All formatting happens in your browser using the sql-formatter library. Our servers are not involved at any point.

Does it validate the SQL syntax?

The tool formats but does not execute or fully validate SQL. Syntax errors may produce unexpected output but will not cause harm.

Can I format stored procedures or multi-statement scripts?

Yes. The formatter handles multiple statements separated by semicolons and preserves statement boundaries.

SQL formatter

SQL formatter is a developer tool that beautifies SQL queries with consistent indentation and keyword casing. It supports Standard SQL, MySQL, PostgreSQL, and T-SQL dialects, handles multi-statement scripts, and outputs ready-to-copy formatted SQL. The tool runs in your browser.

Dialect:

SQL input

Formatting runs entirely in your browser.

Dedicated pages

Direct links for specific SQL formatting needs.

SQL beautifier

Beautify and format SQL queries online. Clean indentation, keyword casing, and readable structure. Free, in-browser.

Format SQL online

Format SQL queries online with proper indentation and keyword casing. Supports MySQL, PostgreSQL, T-SQL and standard SQL. Runs in-browser.

SQL query formatter

Format and prettify SQL queries for PostgreSQL, MySQL, T-SQL, and standard SQL. Free, in-browser. All processing runs in your browser.

MySQL Formatter

Format MySQL queries with proper indentation and keyword casing directly in your browser. Free, private. Runs in your browser.

PostgreSQL Formatter

Format PostgreSQL queries with proper indentation and dialect-aware keyword casing in your browser. Runs in your browser.

How to format SQL

Paste your SQL query into the input area, minified, inline, or unstructured.
Select the SQL dialect if needed: Standard SQL, MySQL, PostgreSQL, or T-SQL.
Click "Format" to apply consistent indentation and keyword casing.
Copy the formatted SQL or download it for use in your query editor or codebase.

Common uses

Reformatting minified or auto-generated SQL to make it human-readable, similarly to how JSON formatter works for JSON data
Standardising SQL style across a codebase with consistent indentation and keyword casing
Preparing SQL queries for documentation or code review using regex testing to verify patterns

Technical specification

Algorithm or formula: Lexer-based formatting via the sql-formatter library. The lexer tokenises the input against a dialect-specific keyword list, then a printer re-emits with consistent indentation, line breaks around major clauses, and configurable keyword casing.
Browser API or library: sql-formatter (~45 KB minified). Dialect modules for Standard SQL, MySQL, PostgreSQL, and T-SQL (Microsoft SQL Server).
Input limits: No hard cap; tested with multi-thousand-line scripts. Multi-statement input (separated by semicolons) is preserved.
Output: Formatted SQL string in the output pane, copyable to clipboard or downloadable as a .sql file.
Known limitations: The tool does not execute or fully validate the SQL; syntactic errors produce best-effort formatting. Vendor-specific extensions outside the chosen dialect may not be recognised as keywords.

Frequently asked questions

Is my SQL sent to a server?: No. Formatting uses the sql-formatter library running entirely in your browser. All processing runs in your browser.
What dialects are supported?: The tool supports Standard SQL, MySQL, PostgreSQL, and T-SQL (Microsoft SQL Server). Select the appropriate dialect for keyword-specific formatting.
Does it validate the SQL syntax?: The tool formats but does not execute or fully validate SQL. Syntax errors may produce unexpected output but will not cause harm.
Can I format stored procedures or multi-statement scripts?: Yes. The formatter handles multiple statements separated by semicolons and preserves statement boundaries.

Reviewed and tested May 26, 2026.