Build ERDs fast. Export freely.

Free & private: Run entirely in your browser; nothing stored unless you export.
JSON import/export only: Save and load diagrams as compact JSON files for portability and versioning.
No account: Start right away — lightweight and responsive.

ERDFree is a lightweight, browser-based editor for designing Entity Relationship Diagrams. No signup, no cost — import and export your diagrams as JSON only for easy portability.

Launch ERD Tool