Vaadin is an open-source Java framework for building modern enterprise web applications. It allows developers to create full-stack web apps entirely in Java, with built-in security, enterprise-grade UI components, and support for Spring Boot, Jakarta EE, and Quarkus backends.

Is Vaadin a free Java framework?

Yes, the core Vaadin framework is open source and free under the Apache 2.0 license. Vaadin also offers commercial Pro and Enterprise plans that include additional components, tools, support, and extended maintenance for teams building business-critical Java web applications.

Which Java backends does Vaadin support?

Vaadin integrates with Spring Boot, Jakarta EE, and Quarkus. You can build applications in Java or Kotlin using the backend framework of your choice.

Do I need to write JavaScript or HTML to use Vaadin?

No. With Vaadin Flow, you can build the entire UI in 100% Java — no HTML, CSS, or JavaScript required. Vaadin handles the client-server communication and rendering automatically. For teams that prefer a frontend approach, Vaadin also supports TypeScript and React via Hilla.

Is Vaadin suitable for enterprise web applications?

Yes. Vaadin is trusted by 40% of Fortune 500 companies and over 200,000 developers worldwide. It is built for data-heavy enterprise applications with features like lazy-loading grids, built-in security, WCAG 2.1 AA accessibility, and up to 15 years of version maintenance.

The UI Framework for Java & Spring

START BUILDING

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                  class ShipmentCard extends Card {
                      public ShipmentCard(ShipmentDto dto) {
                        setTitle("Shipment #" + dto.shipmentId());
                        setSubtitle(dto.shipmentRoute());
                        setHeaderSuffix(createStatusBadge(dto.status()));
                        setHeaderPrefix(new DriverAvatar(dto.driver()));

                        setMedia(new Image(dto.shipmentImageUrl(), IMAGE_ALT));
                        addThemeVariants(CardVariant.LUMO_COVER_MEDIA);

                        add(new Markdown(dto.shipmentDescription()));

                        addToFooter(
                          new PrimaryButton("Update Status", e -> openShipmentForm(dto)),
                          new Button("Track Shipment", e -> viewShipmentOnMap(dto))
                        );
                      }
                    }

                    void openShipmentForm(ShipmentDto dto) {/*TODO*/}
                    void viewShipmentOnMap(ShipmentDto dto) {/*TODO*/}

Shipment #VDN-45892

Berlin, DE → Turku, FI

In Transit

Carrier: Goodie Transport GmbH
Berlin → Travemünde (ferry) → Naantali → Turku. 12 pallets of temperature-controlled goods.

Update Status

Track Shipment

Run the demo project locally

$ git clone https://github.com/vaadin/vaadin-demo.git && cd vaadin-demo && ./mvnw spring-boot:run

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Trusted by leading global institutions

Vaadin or a JavaScript framework?

Vaadin is a full-stack UI framework. React, Angular and Vue leave more to you.

Vaadin

Made for business apps
Tools and portals for known users.
Focus on business logic
Java APIs with browser-server plumbing built in.
Secure by design
Server-side UI means no API for you to harden.
Java end to end
Your Java developers own every layer, UI included.
Built for data-rich workflows
Accessible grids and forms, styled to your brand.
SEO pages live elsewhere
Keep them on a CMS or static site.

React / Angular / Vue

At home on the open web
Anonymous consumer traffic with sudden spikes.
Pieces you combine and maintain
Angular includes most of it. React and Vue, less.
An API in between
Usually one you design, version and secure.
TypeScript up front
Any backend behind it: Java, Python, Node or .NET.
When the UI is the product
Full control of interactions and visual style.
Search pages in the same stack
Server rendering with Next.js, Nuxt or Angular SSR.

UI components for real business applications

SEE LIVE DEMO

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Orders 42,719 16.38%

Sales €546,110.70 40.82%

Visitors 62,806 13.35%

Free & open source, Apache 2.0 licensed.

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All Vaadin components Vaadin Forum UI Training & Certification

Give your AI assistant one Java codebase, not two stacks.

START BUILDING WITH AI

In Vaadin, the view calls your Java service directly. There's no endpoint or client code between them for your assistant to write or your team to review. Add Vaadin's MCP server, and your assistant looks up the API for the version in your pom.xml instead of the one in its training data.

As a plugin

In MCP settings

Works with your Java stack

Use the backend you love the most — Spring Boot, Jakarta EE, or Quarkus — and build in Java or Kotlin.

START BUILDING

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More than a framework

Visual editing in dev mode

Open your running app and shape the UI visually. Create layouts, add components, and tweak views in context. Changes are written instantly to your codebase following Vaadin best practices. Iterate faster with a tight feedback loop while staying in control.

Production-ready integrations

Ship integrations faster without detours. Acceleration Kits provide production-ready setups for SSO, observability, and Kubernetes. Focus on features, not glue work. Secure defaults, proven patterns, and comprehensive documentation included.

UI testing, built for Vaadin

Automate UI testing with Vaadin TestBench. Get fast UI unit testing and thorough end-to-end testing in one tool, with component-aware selectors, built-in waiting, and screenshots on failure. Run tests locally on your machine, in CI, or on a grid.

Modernization with confidence

Modernize from Swing, SWT, and JavaFX on your schedule. Upgrade when it fits your release cadence, and migrate view by view or all at once. Embed legacy alongside new as needed and keep business logic intact. For Swing apps, SwingBridge handles the heavy lifting.

Longest maintenance in the industry

Maintenance for up to 15 years with ongoing security and compatibility updates. Meet regulatory requirements, reduce upgrade risk, and choose your upgrade windows to match your roadmap.

Vendor support

Get fast answers from the engineers behind Vaadin and hands-on help for complex challenges. From design and Figma alignment to development and production, improve time to market with guidance that knows your stack end to end.