ErdDocs

What ErdDocs is

ErdDocs is a web tool for turning relational database schemas into interactive entity relationship diagrams and printable data dictionaries. It accepts PostgreSQL and MySQL dumps, Prisma, DBML, Mermaid, PlantUML, Django, SQLAlchemy, Sequelize, TypeORM, and Laravel migrations. You can drag tables, focus on them, hide them, and share a diagram link. Exports include PNG, SVG, Mermaid, DBML, PlantUML, SQL DDL, and a printable dictionary; Mermaid output can be used for GitHub diagrams, and DBML opens in dbdiagram.io.

Schema parsing and diagram rendering happen in the browser, without uploading the schema. ErdDocs does not connect to a live database, so you must export your schema and paste it into the tool. The free plan draws up to 25 tables in full, previews dictionary content for three tables, and brands exports. A lifetime license costs 9.00 USD, paid once with no renewal, and includes any schema size, the complete printable dictionary, unbranded exports, and activation in any browser. License keys are checked locally, allowing the unlocked tool to keep working offline. The dictionary can support onboarding, audits, and client handover.

Who it suits

ErdDocs suits database users who want diagrams and printable schema documentation from exported schemas, including teams preparing onboarding materials, audits, or client handovers. It is also useful when you need browser-based parsing without uploading the schema.

Limits

The free plan draws up to 25 tables in full; tables beyond that appear as locked placeholders. Its dictionary is limited to a three-table preview, and exports include ErdDocs branding.

Getting started

1. Open https://erddocs.com/ in a web browser.
2. Export a schema from your database or framework.
3. Paste the schema into ErdDocs in a supported format.
4. Use the free plan or purchase the 9.00 USD lifetime license.
5. Explore the diagram, then share its link or export a diagram or dictionary.

Verdict

Choose ErdDocs if you need browser-based diagrams and schema documentation from exported relational schemas, especially if the free plan's 25-table drawing limit is enough. Look elsewhere if you need a live database connection or diagrams that represent Django on_delete and default behavior.