DataGov Canvas – Data Governance Diagrams

Draw data governance diagrams from DBML: ER diagrams, data lineage and metadata. Works offline; exports PNG, SVG, PDF and SQL.

Describe your database in DBML text and see the diagram update live next to it. Or edit the diagram directly — every click and drag is written back into the text. FEATURES • DBML on the left, live ER diagram on the right: tables, columns, primary and foreign keys, indexes, one-to-one / one-to-many / many-to-many relationships • Data governance: table groups, data lineage (upstream and downstream dependencies), metadata, sticky notes, sample records, and views that show only part of the diagram • Visual editing: change tables and columns in the property panel, drag from a column to create a relationship, drop onto the trash can to delete, undo any time • Three display modes: all columns / key columns only / table names only • Import: paste existing CREATE TABLE SQL, or open a DBML file • Export: PNG and SVG images, vector PDF, DBML and CREATE TABLE SQL • Keep as many diagrams as you like, saved automatically on your computer • English and Chinese interface, switch with one click HOW TO USE 1. Click the extension icon in the toolbar — the editor opens in a new tab 2. Write DBML on the left, or click Import and paste existing SQL 3. Drag tables to arrange them; click a table to edit it in the side panel 4. Click Export to save an image, a PDF or SQL PRIVACY Your diagrams stay in your own browser and are never uploaded anywhere. No account, no personal data collected, no analytics, no ads. Works offline. PERMISSIONS • Storage — saves your diagrams and settings on your computer • Unlimited storage — lets large diagrams (many tables, sample records) grow past the browser's default storage limit FEEDBACK AND SOURCE Report issues at https://github.com/bblmian/datagov-canvas/issues or email benjaminfaxpaper01@gmail.com. Open source under the MIT license. Independently developed; not affiliated with the maintainers of the DBML language. Version 0.1.0 — first release