SQL Formatter: Make Any Query Readable in One Paste (Postgres, MySQL, BigQuery)

TL;DR — Paste any SQL into the SQL Formatter to get back a clean, dialect-aware version with proper keyword casing and JOIN indentation. Supports Postgres, MySQL, SQLite, BigQuery, and Snowflake. For escaping query strings for code, use the String Escaper; for inspecting JSONB columns, the JSON Formatter.

Why unformatted SQL is a real bug source

You inherit a 500-character single-line query buried in a Python string. There’s a missing WHERE filter that causes a full-table delete. There’s a join condition swapped with a filter. There’s a LIKE '%foo%' that should have been = 'foo'. You can’t see any of it because the formatting hides the structure.

The fix is one paste. The cost of not formatting is the one query that took down prod.

Before / after

// Before
SELECT u.id,u.email,COUNT(o.id) AS orders FROM users u LEFT JOIN orders o ON o.user_id=u.id WHERE u.active=true AND u.created_at >= '2026-01-01' GROUP BY u.id,u.email HAVING COUNT(o.id) > 0 ORDER BY orders DESC LIMIT 50;

// After
SELECT
  u.id,
  u.email,
  COUNT(o.id) AS orders
FROM users u
LEFT JOIN orders o
  ON o.user_id = u.id
WHERE u.active = true
  AND u.created_at >= '2026-01-01'
GROUP BY
  u.id,
  u.email
HAVING COUNT(o.id) > 0
ORDER BY orders DESC
LIMIT 50;

You can scan the second version in 5 seconds and tell exactly what it does. The first one takes a minute and you’ll still miss something.

How to use the SQL Formatter

1. Open the SQL Formatter.
2. Pick your dialect (Postgres, MySQL, SQLite, BigQuery, Snowflake, MariaDB, etc.).
3. Paste the query. Format runs as you type.
4. Tweak indent size or keyword case (upper/lower/preserve) if your team has a style guide.
5. Copy the formatted output back into your migration, ORM raw query, or BI dashboard.

Real-world habits worth building

• Format before destructive operations. Before running DELETE, UPDATE, or DROP, format the query and re-read the WHERE clause. This catches the "WHERE was actually on the wrong column" bug.
• Format in code review. Reviewers can’t catch SQL bugs hidden inside string concatenation. Format raw queries before posting them in PRs.
• Pre-format CTEs. Stacked Common Table Expressions are the hardest SQL to read — formatting makes the data flow obvious.
• Standardize across the team. Pick a style (uppercase keywords, 2-space indent) and stick to it; the formatter takes care of enforcement.

Privacy: why pasting prod queries elsewhere is risky

SQL queries often contain real customer emails, tenant IDs, internal table names, or competitive business logic. Many "free SQL formatter" sites POST your query to their server for processing. Ours runs locally — the formatting engine ships as JavaScript and never sees the network. Verify in DevTools.

FAQ

Does the formatter execute my SQL?

No. It only parses and re-prints — never connects to any database.

What dialects are supported?

Standard SQL, PostgreSQL, MySQL, MariaDB, SQLite, BigQuery, Snowflake, Redshift, and TSQL. Dialect-specific keywords like QUALIFY (Snowflake/BigQuery) or RETURNING (Postgres) are preserved.

Will formatting change query performance?

No — whitespace is invisible to the query planner. Formatting only changes how humans read the query.

Can I format the SQL inside a string in my code?

Yes — paste the raw query (without the language quotes). After formatting, re-escape with the String Escaper if you need it back as a JavaScript/Python/Java string.

Database-developer toolkit

• SQL Formatter — paste, pick dialect, done.
• JSON Formatter — for JSONB columns and API responses.
• String Escaper — re-quote SQL for embedding in code.