6/22/23, 12:38 PM Vaadin Flow | The Full-Stack Java Web Framework

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Vaadin Flow
Build modern web apps 100% in Java

Vaadin Flow is a unique full-stack framework that lets you build web
apps without writing HTML or JavaScript.

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An easier way to build web applications

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need to expose REST services or come up with other ways to move data to the browser.
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Flow[OK]
apps are rendered in the browser as standard HTML. They work in all modern
browsers and devices, no plugins required. 
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Vaadin Flow in 40 seconds ⚡️Build web apps 10…

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UI components included
Vaadin comes with an extensive set of beautiful UI components, like form inputs, dialogs,
data grids and visualizations. You can extend components and create compositions
directly in your Java code. Everything is built on open web standards and runs on all
modern browsers (without plugins).
Browse components 

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Supports real-time collaboration

Collaboration Engine provides features that enable your users to work together, in real-
time, directly within the app. Show active users, implement a chat and allow multiple
people to work on the same views with just a few lines of code.
LearnWe about Collaboration
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Automated UI testing
Implement and automate UI testing with Vaadin TestBench. User simulated test allows you
to catch any regressions or compatibility issues with all the major browsers before your
users do.
Learn about TestBench 

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Visual UI building
Use Vaadin Designer to build UIs faster. The drag & drop functionality and external device
preview feature enables you to quickly assemble a HTML template that you can implement
for your Flow app.
Learn about Designer 

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
Secure platform architecture
All of your UI logic resides on the server and is never exposed to attackers. Only
one communication servlet is open to the outside world, reducing the attack
surface to the absolute minimum. The framework performs form data validation on
the server, which cannot be accessed with client-side attacks.


Streamlined designer and developer collaboration
The Vaadin components implement a customizable design system that streamlines
your UX design and promotes UI-element reusability. The Vaadin design system
base is available as a Figma library, allowing UX designers to create beautiful
mockups that you can implement directly, without frustrating tweaks or hacks.


All devices with a single code base
Modern browser technologies allow you to deliver progressive web apps (PWAs) on
allWedevices, fromtomobile
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SEE HOW IT WORKS

How Does Vaadin Flow work?
Wondering how full-stack Java web development works? Your UI code runs on
your web server, while Vaadin Flow handles the application state, client-server
communication and UI updates in the browser.

Create your UI in Java

Build your UI from layouts and components in Java. When using the Java API, the
components control their JavaScript counterparts in the browser. You do not need to
know anything about the HTML or JavaScript—that runs under the hood.

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Connect to data
Vaadin is built for data-intensive applications. Whether it is lazy-loading millions of
database rows, or building big, complex forms quickly, Vaadin has the necessary tools.
Connect to any database from the Java server.

React to events
To make applications interactive, Vaadin provides an event-driven programming model.
UserWeinteraction triggers
use cookies events,
to serve which are and
our customers handled by event listeners. In the Java code,
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you can add your event listeners and modify the UI accordingly.
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CREATE A PROJECT
Get started with Vaadin Flow
Create a project with our online configuration tool and download a project which
you import to your local development environment. Alternatively, you can follow
our tutorial on building modern web apps with Spring Boot and Vaadin.
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Powerful data binding

You can bind plain Java objects to forms. Data binding supports both Bean Validation 2.0
(JSR 380) and custom validators.


Spring Boot
The primary Vaadin stack builds on top of Spring Boot. Manage your UI scope, views and
navigation with Spring.


Easy server push
Enable server push with a single Java annotation. Update the UI changes immediately
from a background thread or an event bus.


Scalability
Stateful server-side apps scale to thousands of concurrent users. Read the report.


Framework comparison
HowWedoes Vaadin Flow compare to Angular and React? Use the comparison page for an
in-depth analysis.
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 traffic and marketing purposes. By continuing to
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Customizable look and feel
All Vaadin components come with a modern look and feel that can be easily adapted to
your application.
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
Java EE and CDI
Use Java EE’s contexts and dependency injection via Vaadin's official integration library.


Never limited by the framework abstraction
Vaadin’s front-end engine builds on top of the W3C Web Components standard, which
allows nearly unlimited customization.


Migrating from Swing
Vaadin’s programming model is similar to Swing, simplifying migration. Read the tutorial to
learn how to migrate Java Swing to a web app with Vaadin.

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resources for free
Developers signed up to our website gets access to lots of free
resources and tools built by Vaadin or the community.
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 Customize project starters

Customize and download a project starter at Vaadin Start.
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 Video training and certification

Access to all video training courses and certification exams.
 Download add-ons
Download, review and publish add-ons in the Vaadin Directory.
 Early adopter
Be the first to know about product offers and beta releases.
 Active community
Join an active community of over 150 000 developers worldwide.

Considering Vaadin for your business?

Book a demo with a Vaadin expert to see how our unmatched stability,
commercial tooling and dedicated support services can help your organization
deliver better web apps faster.

Book a demo

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       

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Company Platform

About Flow

Careers UI Components

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