Free Flowchart Maker Web App – Google Apps Script

A flowchart designer that runs in the browser and stores its diagrams in Google Sheets. You draw on a canvas, drag shapes into place, type on them, and the work saves itself as you go — no account with a diagramming service and no file to lose.

What it does

Shapes are placed on an HTML5 canvas and arranged by dragging, with text edited directly on the shape and colours set from the toolbar. Undo and redo hold fifty states, which is what makes a drawing tool usable rather than nerve-racking, and auto-save runs in real time so a closed tab is not a lost diagram. Projects can be saved and loaded again later, and any diagram exports to a PNG image for dropping into a document or a message.

Highlights

• Canvas drawing with multiple shape types
• Drag-and-drop editing, text on shapes, colour tools
• Undo and redo across 50 states
• Real-time auto-save
• Save and reload projects
• Export to PNG

Who it is for

Teachers, analysts, developers and teams who need a quick process diagram and do not want another subscription tool — and anyone curious about how HTML5 canvas drawing is wired to a Google Sheets backend through Apps Script.