Format SQL queries locally with dialect-aware indentation and keyword casing. Choose PostgreSQL, MySQL, SQLite, SQL Server and more, then copy or download the result. Queries are never executed.
Your SQL is never uploaded to any server; formatting is completed locally in your browser. A bundled open-source formatter runs in a cancelable worker, with no database connection, account or query history. Copy and download happen only when you choose.
No. The tool formats text locally. It never connects to a database, executes queries or sends your SQL to a server. A successful format does not prove SQL is valid, supported by your database or safe to run.
The tool exposes 20 dialect choices from SQL Formatter 15.9.0, including Standard SQL, PostgreSQL, MySQL, SQLite, SQL Server, MariaDB, BigQuery, Snowflake and DuckDB. Select the actual dialect instead of relying on automatic detection. Dialect coverage has limits; stored procedures and custom statement delimiters are not supported.
Only keyword casing is configurable. Identifier, data type and function-name casing are configured to preserve their spelling. The formatter handles literals and comments according to the chosen dialect, and placeholders are not substituted. Review the output before use: this is a formatter, not a semantic equivalence checker.
It controls how parenthesized expressions are kept together or expanded. It is not a maximum length for every line. The smallest width of one encourages groups to expand. Statement spacing inserts one or two blank lines between semicolon-separated queries.
Check the dialect first. Invalid tokens, unsupported syntax or tool limits may cause a failure. Input is limited to 100,000 UTF-16 units, output to 1,000,000, and processing to five seconds in a local worker. Stop, edits and leaving the page terminate pending work; no partial result is exported.
The underlying formatter handles comments and recognizes sql-formatter-disable and sql-formatter-enable block-comment directives, which bypass formatting for enclosed text. Such bypassed sections are not parsed. Formatting errors are not a complete SQL validation report. The local bundle includes its MIT license and attribution.
