diagrams.free (https://diagrams.free)
Last updated: June 2026
diagrams.free runs entirely in your browser. Your drawings are stored locally on your device unless you explicitly export or sync them using a feature you choose.
The editor saves your active canvas and preferences in browser storage (localStorage and IndexedDB). This data stays on your device and is not sent to diagrams.free servers because there are no application servers — the site is static hosting.
If you connect Google Drive, OAuth and file access are handled by Google under Google's
privacy policy. diagrams.free only requests access needed to read and write files in your
Drive that the app creates (for example under a diagrams.free/ folder).
The production build does not enable third-party analytics or tracking by default.
Email: support@diagrams.free · open an issue on GitHub.