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Online SQL Converter

Convert SQL between common dialects (MySQL, PostgreSQL, SQL Server, SQLite) using quick, client-side transforms for identifiers, LIMIT/OFFSET, and popular DDL patterns. It’s best-effort—always review before running in production.

Category: Data · URL: /tools/online-sql-converter.html
Best-effort transforms; complex SQL may need manual edits.
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Privacy: runs locally in your browser. No uploads, no tracking scripts.

How to use

Paste your SQL, choose a source and target dialect, then convert.

  1. Select From and To dialects.
  2. Enable/disable conversions (quotes, LIMIT/OFFSET, common types/DDL).
  3. Click Convert, review the output, then Copy.
  4. If a query is complex, use the result as a starting point and validate it.
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Secondary intents covered: Convert a query from one database dialect to another, Fix LIMIT/OFFSET differences between MySQL, PostgreSQL, and SQL Server, Convert identifier quoting (``, "", []) safely enough for quick edits, Translate common DDL (AUTO_INCREMENT/SERIAL, BOOLEAN/TINYINT/BIT) for migrations, Prepare SQL snippets for cross-database testing or documentation, Quickly rewrite NOW()/CURRENT_TIMESTAMP and other common functions, Get a starting point before manual cleanup and validation, Copy a clean converted output without server uploads, Swap source/target dialects to iterate quickly

FAQ

Does this converter run on the server?

No—conversion runs in your browser with simple rules, and it does not fetch anything over the network.

Can it convert complex stored procedures or vendor-specific features?

Not reliably. It focuses on common syntax differences (quotes, LIMIT/OFFSET, a few types/DDL patterns) and gives you a starting point.

Will it always produce valid SQL for the target database?

No. SQL dialects differ a lot; always review the output and validate it (especially for functions, indexes, and constraints).

How does LIMIT conversion work for SQL Server?

LIMIT n becomes SELECT TOP (n) ..., and LIMIT n OFFSET m becomes OFFSET/FETCH (may add a basic ORDER BY if missing).

How are AUTO_INCREMENT and SERIAL handled?

MySQL INT AUTO_INCREMENT becomes PostgreSQL SERIAL (and BIGINT AUTO_INCREMENT becomes BIGSERIAL). Reverse conversion maps SERIAL back to INT AUTO_INCREMENT.

Does it change identifier quoting?

Optionally. It can convert between backticks (`name`), double quotes ("name"), and SQL Server brackets ([name]) using conservative patterns.

Can I convert multiple statements at once?

Yes—paste multiple statements. The tool applies the same rule set across the whole input.