SQL Formatter & Beautifier – Free Online SQL Tools for MySQL, PostgreSQL & More

SQL Formatter & Beautifier

Beautify, minify, validate & convert SQL across 16+ dialects — MySQL, PostgreSQL, SQLite, T-SQL, PL/SQL, BigQuery, Snowflake, Redshift & more. 100% private, runs in your browser.

Input SQL
0 chars · 0 lines · 0 queries
Formatted SQL
Result appears here…
—
🔒 100% private — your SQL never leaves your browser.

Recent SQL

How to Use the SQL Formatter

  1. Pick a mode — Format, Minify, Validate or Convert between dialects.
  2. Choose your dialect — MySQL, PostgreSQL, SQLite, T-SQL, PL/SQL, BigQuery, Snowflake and more.
  3. Paste, type or drop a .sql file into the left pane.
  4. Set your style — indent size, keyword case (UPPER / lower / preserve), spacing between queries.
  5. Click "Run" (or enable Auto-run) — the formatted result appears instantly with syntax highlighting and line numbers.
  6. Copy, download or share — export as .sql or copy a self-contained share link.

What is an SQL Formatter?

An SQL formatter (also called a SQL beautifier or pretty-printer) takes messy, single-line or inconsistently-indented SQL and reformats it into clean, readable, professionally-styled queries. Whether you're reviewing an ORM-generated query, debugging a stored procedure or onboarding a junior developer, formatted SQL is dramatically easier to read, diff and reason about.

Our SQL formatter supports 16+ dialects including ANSI SQL, MySQL, PostgreSQL, SQLite, MariaDB, MS SQL Server (T-SQL), Oracle (PL/SQL), Google BigQuery, Snowflake, Amazon Redshift, IBM DB2, Apache Spark, Trino/Presto, Hive, Couchbase N1QL and SingleStoreDB. It runs entirely in your browser — your queries never travel over the network, which makes it safe for sensitive production schemas, NDAs and regulated environments.

Common Use Cases

👨‍💻 Backend DevelopersFormat ORM-generated queries, stored procedures and migrations before code review.
🗃️ Database AdministratorsStandardise team SQL style and clean up legacy scripts spanning thousands of lines.
📊 Data Analysts & BIBeautify analytics queries for Looker, Metabase, Tableau, dbt and notebook documentation.
🎓 Students & LearnersLearn proper SQL formatting conventions with clear keyword highlighting.
🔁 Database MigrationConvert queries from MySQL to PostgreSQL, Oracle to Snowflake, T-SQL to BigQuery and more.
🐛 Query DebuggingSpot syntax errors, missing commas, unbalanced parentheses and JOIN issues faster.
📝 Technical WritersGenerate clean SQL examples for docs, blog posts, Stack Overflow answers and books.
🚀 DevOps & SREFormat and validate migration scripts in CI/CD before they hit production.
🧪 QA EngineersCompare query versions across releases using clean side-by-side formatting.
📦 ETL EngineersBeautify pipeline SQL for Airflow, dbt, Dagster, Fivetran transforms and snowsql scripts.

Why Choose Our SQL Formatter

✅ 100% Private — SQL is parsed entirely in your browser.
⚡ 16+ Dialects — every major flavour covered.
🔁 Dialect Conversion — translate between MySQL, PostgreSQL, Snowflake & more.
📉 Minify Mode — strip comments & collapse whitespace.
✅ Validation — flags unbalanced quotes, brackets, missing semicolons.
🎨 Syntax Highlighting — keywords, strings, numbers, comments coloured live.
🔢 Line Numbers — toggleable on the output pane.
📐 Indent Control — 2 / 4 spaces or Tab.
🔠 Keyword Case — UPPER, lower, or preserve original.
📊 Query Count — see how many statements are in the script.
📂 File Upload — drop .sql or .txt files up to 10MB.
🕘 History — last 10 queries auto-saved locally.
🌙 Dark Mode — persisted, with syntax-aware contrast.
⛶ Fullscreen — distraction-free editing.
🔗 Share Link — encode & share queries via URL.
↕ Swap In/Out — re-format the output as new input.
⌨️ Shortcuts — Ctrl/⌘+Enter Run, Esc exit fullscreen.
📱 Fully Responsive — desktop, tablet, mobile.
💯 Always Free — no signup, no watermark, no limits.

Frequently Asked Questions

Is my SQL uploaded anywhere?

No. Parsing, formatting and validation all happen inside your browser using JavaScript. Your queries — including any sensitive table names, column names or sample data embedded in them — never leave your device.

What dialects are supported?

Standard ANSI SQL plus MySQL, PostgreSQL, MariaDB, SQLite, MS SQL Server (T-SQL), Oracle (PL/SQL), Google BigQuery, Snowflake, Amazon Redshift, IBM DB2, Apache Spark, Trino/Presto, Hive, Couchbase N1QL and SingleStoreDB.

Does the validator catch every error?

It catches common, mechanical errors — unbalanced quotes, brackets or parentheses, unclosed comments, missing semicolons between statements, and syntactic anomalies the parser stumbles on. It does not connect to a live database, so it can't verify table or column names exist.

Can I convert MySQL to PostgreSQL automatically?

The Convert Dialect mode re-tokenises and re-formats your query into the target dialect's idioms (keyword spelling, identifier quoting). Genuinely incompatible features — e.g. PostgreSQL ::cast vs MySQL CAST(), vendor-specific functions like GROUP_CONCAT vs STRING_AGG — still need a manual sweep, so always test converted queries.

Does it handle multi-statement scripts?

Yes — semicolon-separated statements are formatted as a single script with configurable blank lines between queries.

What size queries can it handle?

Anything up to a few MB works smoothly. We cap file uploads at 10MB.

What does "Dense operators" do?

It removes whitespace around operators like =, +, - so you get a=b instead of a = b. Useful for code-golf and compact migrations.

Which other tools pair well with this?

Try our JSON Formatter, XML Formatter, Text Diff Checker for comparing query versions, and HTML/CSS/JS Minifier.

Does it work on mobile?

Yes — both panes stack vertically and all toolbar controls wrap responsively.

Scroll to Top