SQL Formatter

1. Select your SQL dialect from the dropdown at the top — dialect-specific keywords (e.g. LIMIT vs TOP, NVL vs COALESCE) will be highlighted correctly.
2. Choose your indentation preference and toggle keyword uppercase on or off.
3. Paste your SQL into the input box on the left, or click Sample to load an example.
4. Click Format to beautify, or Minify to strip whitespace for embedding in application code.
5. Copy the result and paste it into your database console or application.

This formatter uses sql-formatter, the most widely used SQL formatting library in the JavaScript ecosystem. It supports 12+ SQL dialects out of the box, including PostgreSQL, MySQL, SQL Server, Oracle, Snowflake, BigQuery, Redshift, Spark, and Trino. It understands CTEs (WITH clauses), subqueries, window functions, CASE expressions, and complex JOIN trees.

SQL (Structured Query Language) is the standard language for interacting with relational databases. As queries grow — joining many tables, nesting subqueries, adding window functions and CTEs — they become difficult to read in their raw form. A SQL formatter (also called a beautifier or pretty-printer) parses the query and re-emits it with consistent indentation, line breaks before major clauses (SELECT, FROM, WHERE, JOIN), and aligned column lists.

Consistent SQL formatting matters in two contexts. First, when reviewing queries in a pull request — a poorly formatted 200-line query is effectively unreadable. Second, when debugging slow queries in production — DBAs often need to paste a query from a slow log into a formatter before they can even understand what it does. This tool makes both scenarios fast.

Pick the dialect your database actually uses. The dialect controls which keywords are recognized as SQL keywords (vs identifiers) and which functions are recognized as built-ins. Standard SQL is a safe default for queries that will run on any database. If you use dialect-specific features like PostgreSQL's RETURNING, MySQL's LIMIT ... OFFSET, or SQL Server's TOP, pick that specific dialect so the formatter recognizes them.

No. The formatter only changes whitespace, line breaks, and keyword casing. It never reorders clauses, never changes identifiers, and never removes parts of the query. The output is functionally identical to the input.

Partially. The formatter handles procedural extensions at the statement level — a BEGIN ... END block, IF ... THEN ... END IF, and similar control-flow structures are recognized and formatted. However, deeply nested procedural code with custom variable declarations may not format perfectly. For complex stored procedures, format the individual SQL statements separately.

No. Everything runs in your browser. Your SQL never leaves your device — which matters because queries often contain sensitive data in WHERE clauses.