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SQL Formatter

Pretty-print SQL queries locally with dialect-aware formatting. Queries never leave your browser.

Keywords
Indent
Formatted SQL
SELECT
  u.id,
  u.name,
  count(o.id) AS order_count,
  sum(o.total) AS revenue
FROM
  users u
  LEFT JOIN orders o ON o.user_id = u.id
WHERE
  u.active = TRUE
  AND o.created_at >= '2026-01-01'
GROUP BY
  u.id,
  u.name
HAVING
  count(o.id) > 3
ORDER BY
  revenue DESC
LIMIT
  20;

How it works

Readable SQL reduces review time and prevents subtle mistakes in joins and filters. This formatter uses a client-side SQL formatting library to tokenize your statement and re-emit it with consistent indentation, keyword casing, and line breaks. Dialect selection adjusts reserved words and subtle syntax differences so PostgreSQL, MySQL, SQLite, and other common engines format cleanly. Because formatting is structural rather than executive, your query is never run against a database from this site. That separation keeps credentials and live data out of scope while still helping you tidy migration scripts, ORM output, and ad-hoc analytics queries. Large scripts are processed in-memory; extremely huge dumps may be slower on modest devices—format logical sections when needed. Always validate critical changes in your own SQL client after formatting, especially when mixing proprietary extensions.

Frequently asked questions

Will formatting change query semantics?

It aims to preserve meaning while adjusting whitespace and casing. Review critical queries after formatting.

Which SQL dialects are supported?

Common dialects such as PostgreSQL, MySQL, SQLite, MariaDB, and standard SQL are available in the selector.

Is my SQL sent to a server?

No. Formatting runs offline in the browser with no query execution or logging pipeline.

Can it format multiple statements?

Yes in most cases. Very large scripts may be easier to format in chunks on slower devices.

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