SQL Formatter

A SQL formatter takes a query written on one line or with inconsistent spacing and rewrites it with clear indentation, line breaks, and consistent keyword casing so its logic is easy to follow. Real-world SQL gets unreadable fast: a few JOINs, a subquery, a CTE, and a long WHERE clause crammed onto a single line obscure the structure that matters when you are reviewing or debugging. This formatter puts major clauses (SELECT, FROM, WHERE, GROUP BY, ORDER BY) on their own lines, indents JOINs and subqueries, aligns conditions, and uppercases keywords by default, which is the most widely used SQL style convention and makes keywords stand out from identifiers. You can pick the dialect (Standard SQL, PostgreSQL, or MySQL) so the tool handles dialect-specific syntax correctly, such as PostgreSQL's double-quoted identifiers versus MySQL's backtick-quoted ones. It is built to handle complex constructs including multiple JOINs, nested subqueries, common table expressions, and window functions. There is one important thing to be clear about: formatting is purely cosmetic. The tool does not validate your SQL, check it against a schema, or run it, so a query with a logical or syntax error stays exactly as broken after formatting, though the cleaner layout usually makes the mistake easier to see. It also does not rewrite or optimize the query; the formatted SQL is logically identical to what you pasted. A common use is cleaning up the dense, machine-generated SQL that ORMs and query builders emit, which is correct but hard to read. Because everything runs in your browser, queries that contain sensitive table names, column names, or literal values never leave your device. For related work, the JSON Formatter handles JSON result sets.