MVP · Alpha
Draw diagrams right in your browser.
Flowcharts, ER diagrams, UML, mind-maps — a fast, keyboard-driven canvas. Start instantly, no account needed.
Tell us what you think. Feedback, bug reports and product news live on our Facebook page.
What's new
Newest first. The new tools are under Lines & areas in the Tools panel on the left; Export is in the toolbar above, with the theme and grid buttons in its top-right corner.
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Real lines, and polygons
A line is now two points: drag it out, then drag either end anywhere. The new Polygon tool draws an area corner by corner — click the first corner again to close it. Drag a corner to move it, click between two corners to add one, or select one and press Delete.
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Download as PNG or SVG
Click Export, then Image: a preview, an optional transparent background, and 1× / 2× / 3× for PNG. The SVG is redrawn from the diagram rather than screenshotted, so it stays sharp at any size and opens in Illustrator or Inkscape. Free, like the rest of this.
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Light mode
Switch between the dark canvas and a light one. Your choice is remembered. Shapes you already drew keep their own colours — new ones are drawn to suit whichever canvas you're on.
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Fade or hide the grid
Click to step the background grid through normal → faint → off. Handy for reading a finished diagram or taking a clean screenshot. Snapping still works either way.
What you can draw
- Shapes, containers, swimlanes & frames
- Lines and polygons, reshaped point by point
- Database tables with row-to-row keys
- UML classes & mind-maps
- Smart connectors with snapping
- DBML + JSON import / export
- Export the board as PNG or SVG
- Undo / redo, everything on the keyboard
Your diagrams stay in this browser
This is an early alpha. Nothing is uploaded to a server — your work is saved locally, in this browser, on this device.
- Clearing your browser data, or using private/incognito mode, will lose your work.
- You won't see your diagrams on another device or in another browser.
- To keep or move a diagram, use Export to save a file — and Import to open it again, anywhere.
Export anything you'd be annoyed to lose.