Block Diagram Maker

Create block diagrams rapidly with powerful and easy to use online diagram tool. Smart connectors and tools let you work fast.

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Create Block Diagrams Quickly

  • Easy alignment and auto-spacing. Smart drag-and-snap tools automatically find the best placement for shapes as you move them.

  • Auto-updating connectors. Connectors stay attached to your block shapes, with common and not-so-common geometry options. Labels position automatically.

  • Syntax-highlighting built in. First-class support for software engineering block diagrams with built-in code syntax highlighting.

Simple block diagram showing an mock linking process flow.
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Get in the Block Diagram Flow

Suite of tools for making block diagrams has been tuned for precision and ease-of-use.

  • Contextual help. In-app help panel provides you with per-task info and useful tips like keyboard shortcuts.

  • Multiple export formats. Export to retina-quality PNG, PDF and SVG.

  • In active development. Improvements and features added regularly.

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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.

No sign-up needed

Try Vexlio, the block diagram tool built for speed and precision. See it for yourself!

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Frequently asked questions

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What is a block diagram?

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Where are block diagrams typically used?

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What is Vexlio?

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Can I use the block diagram maker in Vexlio for free?

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Need to draw a block diagram now?

Jump into the app right away and start drawing - no signup needed.

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