Legacy app modernization

Your legacy Java desktop apps.
In the browser.

Voznes runs existing Java (Swing/JavaFX) desktop applications in any web browser — no rewrite, no code changes — on a serverless cloud backend.

Millions of businesses still run on aging Java desktop software — and a rewrite costs a fortune.

That software can't meet today's expectations for web access and accessibility. Rebuilding it in web technologies is a multi-year, high-risk project most teams can't justify. Voznes gives them the web — without the rebuild.

How it works

The app, in the browser — untouched.

01

No code changes

We containerize your existing Java app and stream it to a browser tab over noVNC. Nothing to rewrite, no migration — you upload the JAR, it runs.

02

Web & accessible

Reach modern web-access and accessibility requirements — ADA, Section 508, the European Accessibility Act — without touching the original application.

03

Serverless & scalable

Runs on serverless AWS. Sessions spin up on demand and scale per user, so you pay for what you actually use.

Also supported

Node.js applications

Beyond desktop apps, the same platform deploys Node.js web applications serverlessly — one control plane for both your legacy Java software and modern web services.

Why now

The pressure to get on the web is here.

Accessibility is law

The European Accessibility Act (2025) and ADA / Section 508 turn web accessibility from nice-to-have into a legal requirement.

Rewrites don't pencil out

Re-engineering a working Java application is prohibitively expensive. Businesses need the app on the web, not a rebuild.

The tech is finally cheap

Serverless infrastructure and browser session streaming make zero-code web-enablement viable for the first time.

Modernizing a legacy Java app?

Or just curious how it works? Let's talk — a short conversation and you'll know if it fits.

Get in touch