Question 1

What is GraphMyDB?

Accepted Answer

GraphMyDB is a free, browser-based tool that lets you visualize SQL schemas as interactive ER diagrams, compare database versions, and preview migration impact — all without uploading data to any server.

Question 2

Which SQL dialects does GraphMyDB support?

Accepted Answer

GraphMyDB supports MySQL, PostgreSQL, and SQLite including CREATE TABLE, ALTER TABLE, FOREIGN KEY, INDEX, and all common DDL statements.

Question 3

What file formats can I upload?

Accepted Answer

You can upload SQL files (.sql), SQLite databases (.db, .sqlite, .sqlite3), CSV/TSV files of any size, JSON schema files (.json), and Excel spreadsheets (.xlsx, .xls). Parsing happens in your browser.

Question 4

Is my data private when using GraphMyDB?

Accepted Answer

Yes. By default GraphMyDB parses files locally in your browser and does not upload your schemas for storage. If you explicitly start a co-op session, GraphMyDB uses a signaling service plus authenticated peer connections so collaborators can sync the live document without accounts or durable project storage.

Question 5

Can I collaborate live with other people?

Accepted Answer

Yes. GraphMyDB supports invite-code co-op sessions for live collaboration on the shared SQL or JSON code. The ER diagram updates locally from that code while each participant keeps independent zoom, pan, and layout control.

Question 6

Can I compare two database schemas?

Accepted Answer

Yes. Use the Compare tab to upload old and new SQL dumps for full snapshot-to-snapshot diff, or the Migration tab for base-plus-migration analysis. Changes are shown visually and as a plain-English changelog.

Question 7

Can I upload large CSV files?

Accepted Answer

Yes. Files of any size are supported. Large CSVs (100 MB+) are automatically sampled — the first ~2,000 rows are read for fast schema inference. Your browser won't freeze.

Question 8

How do I trace a specific column relationship?

Accepted Answer

Click any table node to focus on its relationships (unrelated items dim). Then click a specific column to highlight the exact edge connected to it in amber. Click the canvas to reset.

Question 9

What export formats are available?

Accepted Answer

You can export the diagram as PNG or SVG from the toolbar, and the schema as SQL DDL, CSV, JSON, Excel (.xlsx), or a generated SQLite .db file from the Export tab.

VS Code Database Visualizer Extension