SQL Formatter & Beautifier

Format, beautify, and minify SQL locally with multi-dialect support.

SQL Input

Formatting options

All formatting runs locally in your browser. Large scripts use a background worker.

Formatted Output

How to Use

  1. Paste SQL or upload a .sql file
  2. Choose dialect and formatting options (or apply a preset)
  3. Click Format SQL or enable auto-format
  4. Review formatted output, compare view, analysis, and warnings
  5. Copy or download the formatted SQL

Why format SQL?

Consistent SQL formatting improves code reviews, documentation, onboarding, and debugging. Teams that agree on keyword casing, indentation, and clause layout spend less time deciphering one-line ORM output and migration scripts.

Before and after example

-- Before
select u.id,u.name,o.total from users u inner join orders o on u.id=o.user_id where o.total>100;

-- After
SELECT
  u.id,
  u.name,
  o.total
FROM users u
INNER JOIN orders o ON u.id = o.user_id
WHERE o.total > 100;

Best practices

  • Pick the dialect that matches your database engine
  • Use UPPERCASE keywords for team consistency
  • Put major clauses (FROM, JOIN, WHERE, GROUP BY) on separate lines
  • Review warnings before running DELETE or UPDATE statements
  • Split very large dump files before formatting in the browser

Related tools

Frequently Asked Questions

What does this SQL formatter do?

It reformats SQL text with consistent indentation, keyword casing, and line breaks so queries are easier to read, review, and maintain.

Is my SQL uploaded to a server?

No. Formatting runs entirely in your browser. Your SQL never leaves your device unless you copy or download it yourself.

Which SQL dialects are supported?

PostgreSQL, MySQL, MariaDB, SQLite, SQL Server (T-SQL), Oracle PL/SQL, BigQuery, Snowflake, Redshift, DuckDB, DB2, Trino, Spark, Hive, ClickHouse, and generic SQL.

Does the tool auto-detect my SQL dialect?

Optional heuristic detection suggests a dialect based on syntax markers. You should still pick the correct dialect manually when accuracy matters.

Can I minify SQL as well as beautify it?

Yes. Switch mode to Minify to produce compact SQL. Comment removal during minify is optional and off by default.

Will formatting change query results?

Pretty-printing changes whitespace and layout only. It is not a semantic validator. Always review formatted output before running against production databases.

What file sizes work best?

Small and medium scripts format instantly. Inputs above ~300 KB use a Web Worker. Very large dumps (tens of MB) may slow the browser; split files when possible.

Can I upload .sql files?

Yes. Upload or drag-and-drop .sql or .txt files into the input editor.

Does it support multi-statement scripts?

Yes. Statements split on semicolons outside quoted strings are formatted individually and rejoined with configurable blank lines.

Can I format CTEs and window functions?

Yes for common syntax in supported dialects. Complex vendor-specific procedural blocks may require the matching dialect setting.

What keyword casing options exist?

UPPERCASE, lowercase, or preserve original keyword casing. Identifier, function, and data type casing can be configured separately.

Can I use tabs instead of spaces?

Yes. Enable Use tabs and choose indent width for space-based indentation when tabs are disabled.

What is the Compare tab?

It shows original and formatted SQL side by side so you can verify layout changes before copying output.

What does the Analysis panel show?

Estimated metrics such as statement count, line count, JOIN count, CTE count, subquery depth, and dialect guess confidence.

What warnings are shown?

Lightweight checks such as SELECT *, DELETE/UPDATE without WHERE, and common reserved-word identifier patterns. These are suggestions, not a full SQL linter.

Does it validate SQL syntax?

It performs basic structural checks (empty input, unbalanced parentheses, unterminated quotes/comments). Full syntax validation depends on the formatter engine and chosen dialect.

Can I format SQL dumps with many INSERT statements?

Yes for typical dump sizes. Extremely large bulk INSERT dumps may be slow in the browser; consider splitting the file or using a CLI formatter.

Are comments preserved?

Yes in beautify mode. Minify mode can optionally strip comments when you explicitly enable that setting.

Can I download formatted output?

Yes. Copy to clipboard or download as a .sql file from the output panel.

Does it work offline?

After the page loads, formatting works offline because processing is client-side.

What keyboard shortcuts are available?

Ctrl+Enter (Cmd+Enter on Mac) formats SQL immediately. Auto-format can be toggled for debounced live formatting while typing.

Can I open SQL from other DevToolsBuilder tools?

Yes. SQL to Text and Text to SQL include handoff buttons that open this formatter with your current SQL preloaded.

Is stored procedure formatting supported?

Partially, depending on dialect. PL/SQL and T-SQL procedural blocks work best when you select Oracle PL/SQL or SQL Server dialect.

Why did formatting fail on my query?

The input may contain syntax the selected dialect does not recognize, or there may be unbalanced parentheses or unterminated strings. Try another dialect or fix the reported error location.

Is this tool free?

Yes. There is no account, usage limit, or per-query charge. All processing is local and free.