DiagramLabOpen editor

Private, local-first diagramming

Turn scattered thoughts into clear, connected diagrams.

Map ideas, processes, and plans on a focused visual canvas. Start immediately, save locally, and export without creating an account.

  • No account required
  • Local autosave
  • Free exports
Launch planSaved locally
ResearchCollect needs and constraints
Define scopeTurn findings into priorities
LaunchShip, learn, and improve
Your diagram stays in this browser

A faster visual workflow

Everything you need to make the thinking visible.

DiagramLab keeps the interface small so you can spend less time configuring tools and more time connecting ideas.

Connect ideas naturally

Drag from any side of a note to create clear relationships that stay attached as your diagram changes.

Work directly on the canvas

Edit titles and details in place, then move, resize, zoom, and arrange everything without leaving your flow.

Export on your terms

Create PNG and SVG images for sharing, or keep editable JSON backups that you control.

From blank canvas to useful map

Build a diagram in minutes.

  1. 01

    Add your notes

    Create steps, ideas, decisions, or topics directly on the canvas.

  2. 02

    Draw the relationships

    Connect note handles to reveal sequence, dependency, and context.

  3. 03

    Arrange and export

    Refine the layout and export a shareable image or editable backup.

Private by default

Your diagram content stays on your device.

DiagramLab saves your work in the current browser instead of an application database. There is no account requirement and no cloud copy of your notes.

Read the privacy details

Start with one idea

Give your thoughts somewhere to connect.

Open the editor and make your first diagram—no setup required.

Open DiagramLab