SQL Formatter & Beautifier
Paste any SQL query and get back clean, indented, readable code in seconds. This free SQL formatter online supports MySQL, PostgreSQL, SQL Server, and ANSI SQL — with keyword casing, clause alignment, and built-in danger detection for destructive statements. For other code you work with daily, see the HTML Beautifier and the regular expression tester.
How to Use the SQL Formatter
- Paste your raw or minified SQL into the left input panel.
- Choose your dialect — MySQL, PostgreSQL, SQL Server, or ANSI SQL.
- Select keyword case (UPPERCASE, lowercase, or Title Case) and indent size.
- Click Format SQL, or enable Format on Paste to format automatically.
- Use Parameterize to replace literals with
?placeholders for prepared statements. - Copy the result to your clipboard or download it as a
.sqlfile.
Key Features
- Instant keyword casing: UPPERCASE, lowercase, or Title Case — your choice.
- Clause-aligned indentation for SELECT, FROM, WHERE, JOIN, GROUP BY, and more.
- Multi-dialect support: MySQL, PostgreSQL, SQL Server, and ANSI SQL.
- Minify mode: strip comments and collapse whitespace to a single line.
- Parameterization: replace string and numeric literals with
?or$1placeholders. - Danger detection: red badge for DROP, TRUNCATE, or DELETE without WHERE.
- Format-on-paste for instant formatting as you work.
- Download the formatted output as a
.sqlfile.
Use Cases
Format MySQL queries for code review
When sharing queries with teammates or submitting a pull request, consistent formatting matters. Paste your MySQL query, select the MySQL dialect, and export clean, properly indented SQL that's easy to read at a glance.
Auto-format SQL code pasted from legacy systems
Database export tools and ORMs often produce minified or inconsistently formatted SQL. Enable Format on Paste and the formatter instantly restructures any query into readable clauses the moment you paste it.
Normalize SQL keyword casing across a team
Mixed keyword casing — some queries using select, others SELECT — is a common style issue in shared codebases. Use this SQL pretty printer to standardize every query to a single convention before committing.
Create safe prepared statements with parameterization
Click Parameterize to replace hard-coded values in WHERE clauses with ? placeholders (or $1, $2 for PostgreSQL). This first step toward SQL injection prevention works for both MySQL and PostgreSQL dialects.
Catch dangerous queries before running them
The formatter scans for DROP TABLE, TRUNCATE, and DELETE FROM without a WHERE clause and shows a prominent warning. It's an extra safety net when working in production environments.
FAQ's
The formatter handles standard SQL constructs across MySQL, PostgreSQL, SQL Server, and ANSI SQL. Dialect-specific syntax like PostgreSQL's RETURNING or SQL Server's TOP is preserved as-is; only indentation and keyword casing are normalized.
No. The formatter only adjusts whitespace and keyword case. It never reorders clauses, adds or removes keywords, or alters your query logic. The output is semantically identical to the input.
Parameterize replaces string literals (e.g., 'active') and numeric values in WHERE clauses with ? placeholders. For PostgreSQL, it uses numbered $1, $2 placeholders. This is the foundation of prepared statements, which prevent SQL injection attacks.
No. All formatting runs entirely in your browser using JavaScript. Your SQL queries never leave your device and are never transmitted to any external server. The tool works fully offline once the page has loaded.
The formatter detects DROP TABLE, TRUNCATE, and DELETE FROM statements not followed by a WHERE clause. These are potentially destructive operations that can permanently delete all data in a table. The warning is a safety reminder — it does not block execution.
The Minify tab strips all -- and /* */ comments and collapses all whitespace into a single-line query. This is useful for embedding SQL in application config files, JSON payloads, or anywhere that multi-line SQL is inconvenient.
Yes. Paste multiple statements separated by semicolons and the formatter processes all of them. The stats bar shows a statement count so you can verify each one was detected correctly.
Just open this page in any modern browser — no download, extension, or account needed. Paste your SQL, click Format SQL, and copy the result. The entire formatter runs client-side with no installation required.
A well-formatted SQL query is easier to debug, review, and maintain. Whether you are a backend developer cleaning up ORM output, a data analyst sharing queries with stakeholders, or a DBA standardizing a team's codebase, this free SQL formatter online handles the tedious work of indentation and keyword normalization in one click. It runs entirely in your browser — no account, no installation, no data sent to any server — making it a safe choice even for queries that touch sensitive production data. Bookmark it as your go-to SQL pretty printer and spend less time formatting, more time building.