Online Diagram Maker
Make diagrams quickly, no sign in or sign up required. Sales pitch not necessary.
No account required!
Create Diagrams Quickly
Vexlio is a simple, fast solution for creating many types of diagrams quickly. We're not here to blast you with features, just a tight set of tools for diagramming.
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Easy alignment and auto-spacing. Smart drag-and-snap tools automatically find the best placement for objects as you move them.
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Label arrows in one click. Connectors stay attached to your shapes, and labels position automatically.
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Smart tools make common tasks fast. Purpose-built tools solve common diagramming needs like duplicate-in-grid.

Key features of Vexlio to make diagrams
Suite of tools for making diagrams has been tuned for precision and ease-of-use.

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Infinite canvas. Scroll and zoom without page limits, whether your diagram has five states or five hundred.
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LaTeX-powered labels. Enclose math in
$...$
to render guard conditions, probabilities, or formal annotations right on the canvas. -
Syntax-highlighting built in. Create software engineering diagrams with built-in code syntax highlighting.
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Multiple export formats. Export to retina-quality PNG, PDF and SVG.
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Precision editing. Numeric control panels set exact widths, positions, corner radii, and more. Alignment guides keep even complex layouts tidy.
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Contextual help. In-app help panel provides you with per-task info and useful tips like keyboard shortcuts.
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In active development. Improvements and features added regularly.
No sign-up needed
Try Vexlio, the diagram tool built for speed and precision. See it for yourself!
No account required
Build your first diagram in minutes
- Create a blank canvas. Go to the Main Menu and choose New Document.
- Add shapes. Press R for rounded rectangle or C for ellipse, then click and drag to place.
- Map transitions. Choose a connector type, then click on two points to connect. Vexlio's smart connectors snap exactly to the shape perimeter and move automatically if you move things later.
- Annotate. Double-click a connector or shape to add a label. Or, press Q and click to create a live-edit LaTeX expression.
- Refine layout. Use alignment, distribution, and the drawing grid to keep the overall flow readable at a glance.
- Export. Choose SVG or PDF for crisp vectors (paid), or PNG for quick slides or docs.
Here's what our users have said
Real users speaking about Vexlio's previous desktop version:
I was able to knock together some pretty nice diagrams super-quickly using the demo version. Lots of nice touches.— Gabe R.
Your application fits an empty spot in my toolbelt.— Clint P.
Definitely addresses many of the pain points I have with Google Drawings, Inkscape etc. for making diagrams.— Jim M.
Vexlio has no learning curve - so easy to use.— Peter L.