Download HeidiSQL 12.21

If you want to download HeidiSQL, here’s what you should know before you do. It’s a free, open-source database front-end for Windows built by German developer Ansgar Becker, and it connects to MySQL, MariaDB, PostgreSQL, and Microsoft SQL Server from a single installer under 20MB.

Backend developers who need to poke at a production table without opening a terminal, and freelancers managing a client’s WordPress database over SSH, both lean on it daily. Version 12.21 ships a first attempt at a user manager for PostgreSQL and closes out several CVEs in the bundled libssl and libcrypto libraries.

Key Features of HeidiSQL

• Connects to MySQL, MariaDB, PostgreSQL, and SQL Server side by side, with saved sessions for switching between servers in a click.
• Runs a SQL query editor with syntax highlighting and auto-completion, now reordered in 12.21 so exact matches surface at the top of the list.
• Tunnels connections over SSH, so a remote database behind a firewall can be reached without opening its port to the internet.
• Synchronizes table structures and data between a local copy and a remote server, useful for pushing schema changes to staging.
• Exports and imports data as SQL, CSV, or XML, including full database dumps for backups.
• Shows index size as a colored bar next to each index in the tree, a change introduced in this release.
• Edits table structure, foreign keys, and stored procedures through a graphical dialog instead of hand-writing ALTER statements.
• Manages user privileges and roles from a GUI panel rather than the command line GRANT syntax.

How to Install HeidiSQL

1. Download the HeidiSQL installer above.
2. Run the Setup.exe file and follow the install wizard.
3. Choose the database drivers you need — MySQL, MariaDB, PostgreSQL, or SQL Server.
4. Open HeidiSQL and create a new session with your server’s hostname, username, and password.
5. Test the connection, then save the session for future use.

Enjoy using HeidiSQL!