HeidiSQL
HeidiSQL is a lightweight desktop database client supporting MariaDB, MySQL, PostgreSQL, SQL Server, SQLite, Firebird, and Interbase. It provides a graphical interface for browsing, editing tables, views, procedures, and exporting data across multiple database platforms.
Key facts
Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.
| Field | Value |
|---|---|
| Repository | HeidiSQL/HeidiSQL |
| Owner | HeidiSQL |
| Primary language | Pascal |
| License | GPL-2.0 — OSI-approved |
| Stars | 6.2k |
| Forks | 578 |
| Open issues | 317 |
| Latest release | v12.20 (2026-06-22) |
| Last updated | 2026-07-07 |
| Source | https://github.com/HeidiSQL/HeidiSQL |
What HeidiSQL is
A Delphi/FreePascal-based GUI tool offering schema management, data editing, SQL scripting, and cross-database export capabilities. Compiles to Windows via Delphi 12.1; Linux/macOS build support exists on the Lazarus branch but is noted as incomplete with the free compiler stack.
Get the HeidiSQL source
Clone the repository and explore it locally.
git clone https://github.com/HeidiSQL/HeidiSQL.gitcd HeidiSQL# follow the project's README for install & configurationNeed it deployed, integrated, or customized instead? DEV.co ships production installs.
Best use cases
Implementation considerations
- Windows deployment requires Delphi 12.1 (commercial compiler); Lazarus/FreePascal alternative on non-Windows branches is incomplete.
- Icon assets carry third-party copyright with project-specific licensing; cannot be freely reused outside HeidiSQL builds.
- Pull requests accepted for bugfixes only; new features require upstream contribution; consider maintenance cost if customization is needed.
- No automated deployment or scripting interface evident; primarily a manual interactive tool, not suited for headless/API-driven workflows.
- 317 open issues suggest moderate backlog; last release June 2026, last push July 2026 indicate active but not rapid iteration.
When to avoid it — and what to weigh
- Enterprise role-based access control required — No mention of fine-grained RBAC or audit logging; suitable for single-user or small team scenarios, not multi-tenant deployments.
- Linux/macOS as primary platform — Windows is the primary supported target. Lazarus branch is incomplete; free compiler support is explicitly noted as currently unable to compile the full project.
- Real-time collaborative editing — Desktop GUI tool designed for single-user sessions; no mention of concurrent multi-user editing or conflict resolution.
- Strict vendor neutrality required — Icons8 assets are used under special permission to Ansgar only; redistribution restrictions may complicate commercial licensing or forking.
License & commercial use
GPL-2.0 (GNU General Public License v2.0). Copyleft license requiring source distribution and derivative works to remain open-source under identical license terms.
GPL-2.0 is a strong copyleft license. Commercial use is permitted, but any modifications or distributed derivatives must be released under GPL-2.0 with source code. If HeidiSQL is embedded, packaged, or modified for resale, legal review is mandatory. Binary-only distribution of unmodified HeidiSQL for internal or external use may be permissible but requires verification. Icons8 assets have additional project-specific restrictions—cannot be reused outside HeidiSQL without Icons8 permission. **Requires legal counsel before commercial deployment or bundling.**
DEV.co evaluation signals
Editorial assessment — not user reviews. Directional, with an explicit confidence level.
| Signal | Assessment |
|---|---|
| Maintenance | Active |
| Documentation | Adequate |
| License clarity | Clear |
| Deployment complexity | Moderate |
| DEV.co fit | Good |
| Assessment confidence | High |
Database credentials stored locally; no mention of encryption-at-rest or secrets vault integration. Connection security depends on database-native TLS/auth. No documented security audit, CVE history, or incident response process visible. GUI tool not suitable for hardened air-gapped environments. Users should audit connection handling and credential storage for compliance requirements.
Alternatives to consider
DBeaver (open-source)
Java-based, broader platform support (Windows/Linux/macOS), more active development, and extensive plugin ecosystem. Steeper resource footprint.
TablePlus
Commercial, native UI, multi-database, excellent UX. No source transparency; proprietary licensing.
pgAdmin (PostgreSQL) / MySQL Workbench (MySQL)
Database-specific clients with tighter integration. Fragmented tooling if managing multiple vendors.
Build on HeidiSQL with DEV.co software developers
Our engineering team can assess platform compatibility, licensing requirements, and integration patterns for your stack. Contact us to discuss your database management tooling strategy.
Talk to DEV.coRelated on DEV.co
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HeidiSQL FAQ
Can I use HeidiSQL commercially?
Does HeidiSQL support Linux and macOS?
Can I extend or customize HeidiSQL?
What databases does HeidiSQL manage?
Software developers & web developers for hire
From first prototype to production, DEV.co delivers software development services around tools like HeidiSQL. Our software development agency staffs experienced software developers and web developers for custom software development, web development, integrations, and ongoing support across open-source databases and beyond.
Need help evaluating or deploying HeidiSQL?
Our engineering team can assess platform compatibility, licensing requirements, and integration patterns for your stack. Contact us to discuss your database management tooling strategy.