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Software architecture canvas

Draw the whole system in one place.

FlowArch is an infinite canvas for architecture diagrams: cloud services with their official icons, database tables that turn into SQL, UML and documents side by side. All in the browser, saved to the cloud and shareable by link.

Free, no credit card, nothing to install.

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  • AWS
  • Microsoft Azure
  • Google Cloud
  • Kubernetes
  • PostgreSQL
  • MySQL
  • MariaDB
  • SQLite
  • UML

Features

From rough sketch to a diagram the whole team understands

The pieces of a system design are already in the Library. You drag, connect and explain.

  • A canvas that keeps up with your thinking

    Infinite space, arrows that stick to components, groups, alignment and a keyboard shortcut for every gesture. Move a service and its connections come along.

  • Official cloud icons

    More than 1,500 ready-made components, with each service's name and color: AWS, Microsoft Azure, Google Cloud and Kubernetes.

    • AWS
    • Azure
    • Google Cloud
    • Kubernetes
  • Databases that turn into SQL

    Tables with columns, keys, indexes and relationships drawn on the canvas. A diagnostics panel points out what's wrong, and the SQL comes out ready for your database.

    • PostgreSQL
    • MySQL
    • MariaDB
    • SQLite
  • Ready-made collections

    Complete UML, System Design blocks and device frames for presenting screens. Import them from the Collections Hub in one click.

    • UML
    • System Design
    • Device Frames
  • Context right next to the drawing

    Text documents, mind maps, task lists and comments on the same canvas. The decision stays close to the diagram it explains.

  • Cloud and sharing

    Projects sync to your account on their own. Share a read-only link, with an optional password, and turn access off whenever you want.

Privacy

No ads, no trackers

FlowArch doesn't use advertising cookies or analytics tools. The cookies it does use keep your session and your preferences — and nothing else.

Read the Privacy Policy

Frequently asked questions

Before you start

Is FlowArch free?

Yes. Creating an account is free, doesn't ask for a credit card and gives you the canvas, the collections, the cloud and sharing.

Do I need to install anything?

No. FlowArch runs in the browser, on any recent version of Chrome, Edge, Firefox or Safari.

Where are my projects saved?

In your browser and in your account: projects sync to the cloud automatically while you edit. You can also download a copy of a project as a .flw file at any time.

How do I share a project?

Create a share link from the project itself. You decide whether it asks for a password and whether people who open it can make a copy, and you can turn the link off whenever you want. Whoever receives it signs in with their own FlowArch account and sees the project as read-only.

Which databases does the SQL generator support?

PostgreSQL, MySQL, MariaDB and SQLite. You pick the dialect, and the exported SQL follows its types and constraints.

Are the cloud icons the official ones?

Yes. They are the sets published by AWS, Microsoft, Google and the Kubernetes project, used unmodified and under each vendor's license, which is shown in the Collections Hub.

Your next diagram starts blank.

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