HeidiSQL is a small database client that allows users to connect to and manage databases such as MySQL, MariaDB, PostgreSQL, Microsoft SQL Server, and SQLite. It offers tools for browsing data, editing tables, running SQL queries, importing and exporting data, and managing database structures.
The software is free to use and actively maintained, making it a trusted choice for both personal and professional database work.
Download HeidiSQL v12.21 - Software Mirrors |
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HeidiSQL v12.21 for WindowsHeidiSQL_12.21_64_Portable.zip | 28.41 MB HeidiSQL_12.21.0.7344_Setup.exe | 16.99 MB |
HeidiSQL v12.21 for macOSheidisql_12.21_macos_app.zip | 17.7 MB |
HeidiSQL v12.21 for Linuxheidisql_12.21_amd64.deb | 6.92 MB heidisql-12.21-1.x86_64.rpm | 6.87 MB build-qt6-v12.21.tgz | 6.96 MB build-qt6-arm64-v12.21.tgz | 6.92 MB build-qt5-v12.21.tgz | 6.96 MB build-gtk2-v12.21.tgz | 7.02 MB |
HeidiSQL v12.21 Source Code
HeidiSQL v12.21 Source code (zip)
HeidiSQL v12.21 Source code (tar.gz)
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HeidiSQL v12.21 Release Notes: 12.21 - 2026-08-03
⛰️ Features
- Create opt-in option for displaying columns in database tree - (f492bed)
- Enhance order of items in completion proposal, so exact matches are at the top - (c1b817b)
- For keyboard navigation on the completion proposal, wrap around the item list - (db952f8)
- First attempt to create a user manager for PostgreSQL - (f0d7103)
- Show index icons on columns in tree, and the data type text color - (e6e90aa)
- Auto-adjust width of various combo boxes - (ca9b748)
- Show table columns in tree, as child nodes - (0e20e70)
- Query size of all indexes in one query - (c5201eb)
- Display size of each index and paint a color bar behind it - (48a93d2)
- Make custom proposal popup interval effective - (500c529)
- Icons, colors and padding in completion proposal - (3d1254d)
🐛 Bug Fixes
- (ui) Exchange icon for "column" and its variants for add, delete, edit - (08558f9)
- Sporadic crash in DBtreePaintText with columns - (f76c54f)
- Enable foreign key drop down on grid field in MS SQL mode - (9f83561)
- Remove column nodes from tree in table tools dialog - (b09823e)
- Empty command line part for sshpass on FreeBSD - (ed881b3)
- Handle MONEY column types as float - (67521d4)
- Hang and wrong check states in data grid column selection on macOS - (6c5b66c)
- Invalid folder path for SQL export cannot be created if it contains a duplicated path delimiter - (4555274)
- Various CVEs regarding libssl and libcrypto - (379d28a)
- Context menu does not appear at right-click on a tree node text - (8befce3)
- Crash when opening textfile import dialog, with 0 tables in database - (83c4947)
- Crash when cancelling session manager while a session rename is active - (1da8683)
- Prevent crashes from SetFocus on various controls - (bf46821)
- Data grid header keeps showing previous table's columns on macOS - (255695d)
- Prevent SQL error "Property 'MS_Description' already exists" - (ac50b73)
- Enhance anchors on some of the table editors controls - (bfebd9e)
- Bad width of collation combo box - (a90f73c)
- File > "New window" does nothing on macOS - (0583a4e)
- Still wrong proposal background color in dark mode - (e62c47f)
- Wrong proposal background color in dark mode - (eec978c)
- Crash when opening a table, due to using the TCanvas member of a not yet visible form or frame - (bfe29c1)
- Give the trees and grids more height for the header - (568098a)
- Widen many TSpinEditEx instances to either 80px or align them with neighbor controls - (5964be6)
- Some trees have their own OnContextMenu logic set at design time, do not overwrite - (7c2870a)
- Work around unused Header.PopupMenu menu on Linux when a tree has a PopupMenu - (2030a91)
- DPI related scale glitches, mainly on completion proposal - (905b126)
- Do not paint size bar in nodes of level 2, and do not show "-" text there neither - (3e678bc)
- Bad text color for selected item in proposal - (1c46db7)
- Propose items when editor already contains a leading backtick quote - (8f12b3e)
- Missing support for custom keyboard shortcut for executing completion popup - (79f1d38)
- Glitches with padding in completion proposal, and non-restored width - (cf67d11)
- EXPLAIN actions either disabled or non-working for PostgreSQL and SQLite - (2572681)
- Hanging in a loop over result nodes by right-click on query result - (bc8f903)
- Detect release version string from Lazarus project file, and insert into Contents/Info.plist of macOS bundle - (2171b58)
- Crash during refresh on disconnected session - (0b0106d)
- When parsing the command line, make use of Application.GetOptionValue and friends, instead of ParamStr(x) with regular expressions - (f436354)
- Use default library of connection when the one from a stored session contains an invalid path/file - (51023c3)
- Refresh session tree after import per More > Import settings file - (cfca46f)
- CAS(x AS CHAR) not supported by MySQL below v4.0.2 - (e9e5263)
- Always enable release link label on update check dialog, which points to the general download page - (2d475d2)
- Prepend database name to the trigger name at the correct position, when newer MariaDB versions use IF NOT EXISTS - (27a3a51)
🚜 Refactor
- Prefer Delphi friendly SysUtils.PathDelim over System.DirectorySeparator - (84104d0)
⚡ Performance
- Avoid full string scans in StrEllipsis - (32f3bd0)
⚙️ Miscellaneous Tasks
- Update SQLite libraries to v3.53.4 - (7bfd91d)
- Ignore auto-created IntelliJ project files - (64613cf)
- Prefer macos-15 over macos-15-arm64, due to better availability of the Intel runners - (c3be9d4)
- Stick to macOS 15, because the FPC package is only officially qualified up to macOS 11 and uses a package format Apple has tightened in newer releases, so it no longer installs on the macos 26 runners. - (0c969da)
Cleanup
- TbsSeparator TToolButton's now seem to have a default width of 8px (was 6px at some point), and TStatusBar's height now has a default height of 23px (was 28px) - (660c82d)
Localize
- Update compiled .mo translation files - (3480cf4)
[!NOTE]
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For a list of all the changes up to date, please read CHANGELOG.md. |
Key Features of HeidiSQL
Multi Database Support
HeidiSQL supports MySQL, MariaDB, PostgreSQL, Microsoft SQL Server, and SQLite, enabling users to manage different database systems from one interface.
User Friendly Interface
The clean layout makes it easy to navigate databases, tables, views, and procedures.
SQL Query Editor
A powerful SQL editor with syntax highlighting and code completion helps users write and execute queries efficiently.
Table and Data Editing
Users can view, insert, edit, and delete data directly within tables using a spreadsheet like interface.
Import and Export Tools
HeidiSQL supports importing and exporting data in formats such as SQL, CSV, XML, and HTML.
Database Structure Management
Users can create and modify tables, indexes, triggers, views, and stored procedures.
Session Management
Multiple connections and sessions can be saved and reused for faster access.
Secure Connections
Supports SSH tunneling and SSL for secure database connections.
Lightweight and Fast
HeidiSQL runs efficiently even on systems with limited resources.
Benefits of Using HeidiSQL
Saves Time
Quick access to databases and fast query execution improve productivity.
Easy to Learn
The intuitive interface is suitable for beginners while offering advanced tools for professionals.
Flexible Database Management
Supports multiple database engines in a single application.
Free and Open Source
No licensing cost, making it ideal for individuals and businesses.
Reliable for Daily Use
Stable performance for routine database administration tasks.
HeidiSQL is a dependable and efficient database management tool that balances simplicity with powerful functionality. With support for multiple database systems, a strong SQL editor, and lightweight performance, it is an excellent choice for managing databases on Windows. For users seeking a free, fast, and versatile database client, HeidiSQL remains one of the best options available.
HeidiSQL is a popular open source database management software designed for developers, database administrators, and data analysts. It provides an easy and efficient way to manage, edit, and query databases while maintaining a lightweight footprint and fast performance. HeidiSQL is widely appreciated for its simplicity, flexibility, and support for multiple database systems.
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