Download HeidiSQL v12.21, released on 03 Aug 2026
Installation notes
- Compatibility notes
- Windows:
- Microsoft Visual C++ Redistributable libraries are required for some drivers. Download and install them from Microsoft if you get errors saying "vcruntimeXYZ.dll missing".
- A preview of v13 can be downloaded here (updated on 2026-09-22 18:19). Unzip it in your existing HeidiSQL directory, and you can use both version in parallel.
- Linux:
- For the .deb and QT releases, Ubuntu 24.04 needs libqt6pas (not in the repos yet):
curl -L -o /tmp/libqt6pas6_6.2.10-1_amd64.deb https://github.com/davidbannon/libqt6pas/releases/download/v6.2.10/libqt6pas6_6.2.10-1_amd64.debsudo apt install /tmp/libqt6pas6_6.2.10-1_amd64.deb
- Install package:
- DEB:
sudo apt install ~/Downloads/heidisql...deb - RPM:
sudo yum install Downloads/heidisql...rpm
- DEB:
- Settings are stored in a .json file. You may migrate your settings from a Windows registry:
- click File > "Export settings" (to .txt file) in the Windows version
- click File > "Import settings" in the Linux version
- For the .deb and QT releases, Ubuntu 24.04 needs libqt6pas (not in the repos yet):
Latest changes and nightly builds
Latest automatically compiled main executable and installers for HeidiSQL. Just download and overwrite your existing C:\Program Files\HeidiSQL\heidisql.exe. Be aware that these builds are not official releases and therefore probably have more bugs, possibly serious ones.
| Classic Windows version | v13 Preview, Current Linux and macOS versions |
|---|---|
enhance: hint at "Send batch in one go" for undeclared variables on MS SQLBackport of 4ed6e5feda00989e6ccd9d39b6945c479c3e67c8 from the lazarus branch to master (Delphi/Windows version). Refs #2634. Generated by Mistral Vibe. Co-Authored-By: Mistral Vibe <vibe@mistral.ai> 19e3cbf: 13 Oct 2026 21:10 v12.21.0.7361 
fix: fetch MS SQL binary column values via TBlobField stream in GetColBinDataADO variant of the lazarus branch fix. Refs #1980 Co-authored-by: ansgarbecker <ansgarbecker@users.noreply.github.com> ba9df08: 10 Oct 2026 12:56 v12.21.0.736064bit build ≃ Installer ≃
fix: read SQLite BLOB columns via sqlite3_column_blob instead of truncated textBackport from lazarus branch. Refs #1980 Co-authored-by: ansgarbecker <ansgarbecker@users.noreply.github.com> 5c54203: 10 Oct 2026 12:53 v12.21.0.7359
fix: wrong hex prefix/postfix for PostgreSQL, insecure break after testing 1024 characters in IsHexRefs #1980 Co-authored-by: ansgarbecker <ansgarbecker@users.noreply.github.com> e8979be: 10 Oct 2026 12:15 v12.21.0.7358
fix: hide LIKE quick filters in context menu of binary grid values, which would now be broken through quoted hex valuesRefs #1980 Co-authored-by: ansgarbecker <ansgarbecker@users.noreply.github.com> e61ffdc: 10 Oct 2026 12:06 v12.21.0.7357
fix: use correct hex prefix/postfix on MS SQL and PostgreSQL, allow odd length of hex body in MySQLRefs #1980 Co-authored-by: ansgarbecker <ansgarbecker@users.noreply.github.com> 68a291a: 10 Oct 2026 11:57 v12.21.0.7356
fix: wrong IsHex result on non-MySQL connections, prevent escaping quotes in SQLite hex values x'aa...'Refs #1980 Co-authored-by: ansgarbecker <ansgarbecker@users.noreply.github.com> 53df50a: 10 Oct 2026 11:32 v12.21.0.7355
fix: use connection specific hex prefix and postfix when editing binary values in gridRefs #1980 Co-authored-by: ansgarbecker <ansgarbecker@users.noreply.github.com> 2c48500: 09 Oct 2026 19:36 v12.21.0.7354
fix: implement TSQLiteQuery.GetColBinData for byte-exact BLOB accessRefs #1980 Co-authored-by: ansgarbecker <ansgarbecker@users.noreply.github.com> 770f19c: 08 Oct 2026 20:47 v12.21.0.7353
fix: assign SQLite procedures sqlite3_column_blob and sqlite3_column_bytes to TSQLiteLibRefs #1980 Co-authored-by: ansgarbecker <ansgarbecker@users.noreply.github.com> bd3ab46: 08 Oct 2026 20:34 v12.21.0.7352
fix: invalid JSON export from empty grid resultCloses #2618 4c196b9: 01 Oct 2026 19:20 v12.21.0.735164bit build ≃ Installer ≃
fix: re-enable setting width of helpers box on query tabshttps://www.heidisql.com/forum.php?t=45368 bf0463b: 27 Sep 2026 15:32 v12.21.0.735064bit build ≃ Installer ≃
fix: default name for new constraint too long for MySQLRefs #2609 0fec887: 27 Sep 2026 15:01 v12.21.0.734964bit build ≃ Installer ≃
fix: (backport of c976d17e69d3e398f614926656da2fa7c0a82fd8) keep database nodes expanded on tree refresh, and hide table tabs after dropping the objectRemember expanded database and group nodes before resetting them in RefreshTree, and expand them again afterwards. Hide editor and data tab after the refresh if no table-like object is focused any more. Does not touch the FTreeRefreshInProgress timing, which broke saving tables in #2436. Take over the schema of a just created object, so it gets reselected in the tree on MS SQL and PostgreSQL. Closes #16 Closes #2431 c123ccd: 22 Sep 2026 18:08 v12.21.0.734864bit build ≃ Installer ≃
feat: Use fully qualified table name in "Select Top x rows" action when a click on it is combined with Shifthttps://www.heidisql.com/forum.php?t=45359 aa0f350: 10 Sep 2026 18:18 v12.21.0.734764bit build ≃ Installer ≃
fix: use newer/renumbered MYSQL_* constants with libmysql v8+Refs #2587 2508516: 27 Aug 2026 19:26 v12.21.0.734664bit build ≃ Installer ≃
enhance: rephrase warning message displayed when a grid edit/delete did not affect any rowRefs #2568 ca238aa: 07 Aug 2026 08:32 v12.21.0.7345
Bump version for v12.21 release
effb854: 03 Aug 2026 19:12 v12.21.0.734464bit build ≃ Installer ≃
chore: update SQLite libraries to v3.53.4
05c57aa: 03 Aug 2026 13:37 v12.20.0.7343 |
FingerlessGloves:
enhance: hint at "Send batch in one go" for undeclared variables on MS SQL Closes #2634 4ed6e5f: 13 Oct 2026 18:45
FingerlessGloves:
fix: indexes created with CREATE INDEX not shown on MS SQL Read keys from sys.indexes instead of IS.KEY_COLUMN_USAGE, which only lists PRIMARY KEY and UNIQUE constraints. Closes #2633 8c41545: 13 Oct 2026 18:45
FingerlessGloves:
fix: hanging query tab and double execution of non-SELECT queries on MS SQL Opening the result of a statement without result set executed it a second time, then raised an exception which silently killed the query thread. Only keep results which have rows, and finish the batch with an error if setting up results fails. Closes #2392 a48a722: 13 Oct 2026 18:45
Vibe Nuage Agent:
ci: make SignPath signing policy configurable via SIGNPATH_SIGNING_POLICY variable Co-authored-by: ansgarbecker <ansgarbecker@users.noreply.github.com> 363f829: 11 Oct 2026 12:26
Vibe Nuage Agent:
ci: switch SignPath GitHub Action to v3 connector Co-authored-by: ansgarbecker <ansgarbecker@users.noreply.github.com> 3fe7e75: 11 Oct 2026 12:14
Vibe Nuage Agent:
ci: sign Windows heidisql.exe via SignPath GitHub Action Co-authored-by: ansgarbecker <ansgarbecker@users.noreply.github.com> 1359bce: 28 Sep 2026 21:23
Vibe Nuage Agent:
fix: use TBlobField.SaveToStream instead of DataStream, unavailable in FPC Co-authored-by: ansgarbecker <ansgarbecker@users.noreply.github.com> 816cbd2: 10 Oct 2026 12:34
Vibe Nuage Agent:
fix: fetch MS SQL binary column values via TBlobField stream in GetColBinData Fixes wrong hex display of varbinary/binary values in the data grid, caused by the string conversion in TSqlSrvQuery.Col corrupting raw bytes. Refs #1980 Co-authored-by: ansgarbecker <ansgarbecker@users.noreply.github.com> 8f34f5f: 10 Oct 2026 12:28
Ansgar Becker:
fix: wrong hex prefix/postfix for PostgreSQL, insecure break after testing 1024 characters in IsHex Refs #1980 2b64345: 10 Oct 2026 12:15
Ansgar Becker:
fix: hide LIKE quick filters in context menu of binary grid values, which would now be broken through quoted hex values Refs #1980 dc5c5ab: 10 Oct 2026 12:06
Ansgar Becker:
fix: use correct hex prefix/postfix on MS SQL and PostgreSQL, allow odd length of hex body in MySQL Refs #1980 bdb27f1: 10 Oct 2026 11:57
Ansgar Becker:
fix: wrong IsHex result on non-MySQL connections, prevent escaping quotes in SQLite hex values x'aa...' Refs #1980 29d26b5: 10 Oct 2026 11:32
Ansgar Becker:
fix: use connection specific hex prefix and postfix when editing binary values in grid Refs #1980 e06a4ff: 09 Oct 2026 19:36
Vibe Nuage Agent:
fix: implement TSQLiteQuery.GetColBinData for byte-exact BLOB access Refs #1980 Co-authored-by: ansgarbecker <ansgarbecker@users.noreply.github.com> b49cd3d: 08 Oct 2026 20:47
Vibe Nuage Agent:
fix: read SQLite BLOB columns via sqlite3_column_blob instead of truncated text Refs #1980 Co-authored-by: ansgarbecker <ansgarbecker@users.noreply.github.com> 24b80ba: 08 Oct 2026 20:39
Ansgar Becker:
fix: assign SQLite procedures sqlite3_column_blob and sqlite3_column_bytes to TSQLiteLib Refs #1980 707543c: 08 Oct 2026 20:34
Ansgar Becker:
fix: state updated Lazarus 4.8 version used in workflow
7b0684d: 08 Oct 2026 20:22
Lucas Daniel Alberti:
fix: use Cmd instead of Ctrl for default keyboard shortcuts on macOS On Cocoa, ssCtrl is the physical Control key, while the Command key arrives as ssMeta. All default shortcuts of actions and of the SynEdit keystrokes use ssCtrl, so Cmd+C/V/X/A/Z did nothing in the query editor and other SynEdits. Move default Ctrl+letter/digit shortcuts to Cmd on macOS, before customized shortcuts are applied. Q, H, M and W are left alone, as Cmd+Q/H/M/W are reserved for app and window handling. The shortcut editor in the preferences dialog has no checkbox for Cmd, so it now keeps that modifier instead of silently dropping it when leaving an item. Closes #2369 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> 5aaa0eb: 01 Oct 2026 18:22 |