Best Self-hosted Alternatives to dbdiagram.io

ChartDB is an open-source, web-based database diagramming editor for visualizing and designing relational database schemas. It generates diagrams from a single “smart query” result, letting you model and review schemas without granting ChartDB direct database access.

Key Features

• One-query schema import that converts your database schema into a diagram
• Interactive ERD editor to adjust tables, relationships, and annotations
• Export diagrams as images and export schema as SQL/DDL scripts
• AI-assisted DDL generation to help convert between SQL dialects (optional)
• Supports multiple databases including PostgreSQL, MySQL, MariaDB, SQL Server, SQLite, and others
• Runs in the browser and can be deployed via Docker

Use Cases

• Quickly document an existing database schema for teams and stakeholders
• Design or refactor schemas visually before applying migrations
• Generate DDL for cross-database migration planning and review

Limitations and Considerations

• AI export features require configuring an external LLM endpoint (for example via an API key or custom inference server)
• Schema import relies on database-specific “smart query” output, so results may vary across supported engines

ChartDB is a practical tool for fast schema visualization and collaborative database design workflows. It is well-suited for teams that want ER diagrams and exportable DDL without providing direct database credentials to the diagramming tool.

diagrams.net (branded draw.io) is a web-first diagramming and whiteboarding application that runs in the browser and as an offline desktop app. It provides a full-featured diagram editor for flowcharts, UML, org charts, wireframes and network diagrams, and integrates with common cloud storage and collaboration platforms.

Key Features

• Full client-side diagram editor with drag-and-drop shapes, connectors, layers and styling presets
• Large library of templates and icons for common diagram types (flowcharts, UML, ER, network, wireframes)
• Export/import to PNG, JPEG, SVG, PDF and native draw.io XML formats; versioned files and local storage options
• Integrations with cloud storage and platforms (Google Drive, OneDrive/SharePoint, Dropbox, GitHub/GitLab, Atlassian products) and a hosted web app entry point
• Official desktop builds (Electron) for Windows, macOS and Linux to support offline use and tighter security controls

Use Cases

• Create architecture diagrams, flowcharts and UML for design and engineering documentation
• Produce editable diagrams for product specs, onboarding docs and team knowledge bases stored in cloud repos
• Design wireframes and process maps for product, ops and network teams that require export to common formats

Limitations and Considerations

• The GitHub repository contains minified client code and the project notes that not all build sources are published; the project is not maintained as a fully open-source, buildable source tree and the team does not accept pull requests. This may limit ease of building custom forks from the repo.

diagrams.net (draw.io) is a mature, widely used diagramming tool that prioritizes a full client-side editing experience, multiple platform deployments (web and Electron desktop) and broad cloud integrations. It is suitable for technical and non-technical teams that need a versatile diagram editor without mandatory sign-in.

Azimutt is a database exploration and analysis platform that helps teams visualize, document and optimize database schemas and data. It provides a scalable ERD, a compact DSL for designing schemas (AML), connectors for many databases and tools for documenting and analyzing schema quality.

Key Features

• Scalable interactive ERD viewer that lets you choose which tables/columns/relations to show and follow relations visually
• AML (Azimutt Markup Language) for fast, text-first schema design and conversions to SQL dialects
• Gateway architecture to connect to many databases via a Node.js gateway and a CLI for exports and analysis
• Table/column notes, tags, layouts and memos for contextual documentation and shareable/embedable diagrams
• Schema analysis and linter-style checks to surface inconsistencies and best-practice suggestions
• Data navigation and on-demand data access (follow foreign keys, inspect entities) for deeper exploration
• Integrations and developer tooling: CLI, VS Code extension, browser extension, Docker deployment and sample projects

Use Cases

• Rapidly explore and document a large or legacy relational schema to onboard engineers or analysts
• Prototype and design schemas using AML, then export or convert to target SQL dialects
• Audit and analyze schema health to find inconsistencies, missing indexes or questionable relations

Azimutt combines visual exploration, structured documentation and automated analysis to make databases easier to understand and maintain for teams. It is geared toward developers, data engineers and architects who need a compact, shareable view of complex schemas.