HeidiSQL - MariaDB/MySQL, MSSQL, PostgreSQL, SQLite and Interbase/Firebird made easy | WarmIndex

HeidiSQL is a lightweight, free, and open-source desktop application that provides a graphical interface for developers and database administrators to manage MariaDB, MySQL, Microsoft SQL Server, PostgreSQL, SQLite, Interbase, and Firebird databases.

🚀 Overview

HeidiSQL is a powerful yet lightweight GUI tool designed to simplify database management across multiple popular database engines. It allows users to connect to servers, browse data, execute queries, and perform administrative tasks all in one intuitive window.

What problem does this project solve? It addresses the complexity and tedium of command-line database administration by offering a spreadsheet-like grid for data editing, multi-tab support for sessions, and versatile import/export capabilities.

Who is it built for? Database administrators, developers, and power users who work with MySQL-family databases, PostgreSQL, SQL Server, and more, particularly on Windows.

Why did you build it? Created by Ansgar Becker in 2002 as a fast, native Windows alternative to bloated tools like MySQL Workbench or phpMyAdmin, emphasizing speed, simplicity, and cross-database support.

✨ Key Features

Connect to multiple servers simultaneously in one window, with SSH tunnel and SSL support
Browse and bulk-edit table data in intuitive grid views, insert binary files, and perform batch operations
Advanced SQL editor with customizable syntax highlighting, code completion, reformatting, and process monitoring
Export/import data in formats like SQL, CSV, HTML, XML, Excel; direct server-to-server database copying
Optional: Experimental Linux and macOS builds via Lazarus

🛠 Tech Stack

Desktop: Delphi 12.3 (Windows), Lazarus/FreePascal v4.4 (Linux/macOS)
Components: SynEdit (syntax highlighting), VirtualTreeView (grids and trees)
Error handling: madExcept
License: GPL-2.0
No backend/database/auth/hosting (native desktop app)

👥 Who Is This For?

This project is useful for:

Developers who want to manage databases without switching between multiple tools
DBAs looking for a fast, lightweight client supporting various SQL engines
Indie makers and teams handling MySQL, PostgreSQL, or SQL Server on Windows

📸 Screenshots / Demo

Screenshots: https://www.heidisql.com/screenshots.php
Live demo: N/A (desktop application)
GitHub: https://github.com/HeidiSQL/HeidiSQL

🔥 Project Status

🟢 Actively building

Last updated: 2026-03-24

❓ FAQ

Is this project free?

Yes / Open Source (Completely free software under GPL-2.0, no paid tiers or subscriptions.)

Is the source code available?

Yes — https://github.com/HeidiSQL/HeidiSQL

Can I contribute?

Report bugs and feature requests via GitHub issues. Submit pull requests for bugfixes (reference issue ID). Contribute translations on Transifex. For core development access, contact Ansgar Becker via the forum or imprint.