SQL Formatter & Beautifier

SQL formatter for readable queries — code review, debugging, documentation, and teaching

Long SQL queries copied from logs, ORM output, or legacy reporting tools often arrive as a single dense line that is nearly impossible to review. This SQL formatter pretty‑prints SELECT, INSERT, UPDATE, DELETE, and CREATE statements with consistent indentation, keyword capitalisation, and line breaks — directly in the browser. No upload, no account, no query execution.

The two‑panel layout keeps raw input on the left and formatted output on the right, so you can scroll either side independently. A single‑click Minify button compacts SQL back into one line when a tool or config field requires it.

Who uses it

• Backend and database developers — format queries before code review so JOINs, WHERE clauses, subqueries, and grouping logic become scannable.
• Data analysts and BI engineers — clean up generated SQL from reporting tools before pasting it into documentation or a team Slack thread.
• QA and support engineers — read slow‑query‑log entries and debug output without manually re‑indenting every line.
• Students and instructors — teach and learn SQL structure with readable indentation that makes nesting and clause order obvious.

How to use it well

1. Paste the raw SQL. The formatter accepts most dialects (MySQL, PostgreSQL, SQLite, SQL Server, standard SQL) and normalises keyword casing.
2. Click Format. Commas, JOINs, subqueries, and CASE branches each get their own indentation level — the structure becomes visible immediately.
3. Review the formatted query for logic issues that were hidden in the minified original — missing JOIN conditions or nested ORs without parentheses.
4. Copy the clean result for a PR description, documentation snippet, or team message. Keep the original if you need to re‑run it.

Practical tips

• Format before code review — indented SQL makes it obvious when a JOIN is missing an ON clause or a WHERE filter is applied at the wrong nesting level.
• Review ORM‑generated SQL after formatting — what looks fine in a method chain can produce surprising table scans when indented.
• Keep aliases meaningful. The formatter preserves them as‑is; change vague aliases (a, b, t1) to readable ones before sharing.
• Minify only for tools that require a compact single‑line format; most modern database tools accept formatted SQL without issues.

Common use cases

• Pretty‑printing queries from slow‑query logs, monitoring dashboards, and error reports
• Preparing SQL snippets for pull‑request descriptions and internal documentation
• Making nested SELECT statements and CTEs readable during debugging sessions
• Teaching SQL structure — students paste raw queries and see clause order and nesting rules visually
• Cleaning up generated SQL from BI tools, ETL pipelines, and ORM debug output

Privacy and browser‑side processing

All formatting runs locally in the browser. Your SQL — which may contain table names, column names, join conditions, and sometimes inline data — never leaves your device. For production database credentials and queries against live sensitive data, use your database client's built‑in formatter or a local IDE.

Related searches and tools

People who use this SQL formatter often also need JSON Formatter (API response inspection), Regex Tester (validate patterns for log parsing and data extraction), and JWT Decoder (inspect auth tokens). All three run in‑browser.