Is CheerpJ JNLP Runner safe?

Medium risk

Runs Java Web Start JNLP applications in the browser without a local Java installation.

This extension automatically opens a new Chrome tab when you visit a website hosting a JNLP file, then lets you start the Java application in the browser after accepting the license. It can also run a local JNLP file dropped into the extension popup when downloading the file is not possible.

Rated medium risk because of who publishes it: 1 of the 2 other listings from the same operator is rated high or critical for malicious behaviour. Flagged: Поток (high).

Leaning Technologies LtdChrome Web Store
40Risk
Who publishes it

Leaning Technologies Limited - 2 other listings from the same operator, 1 of them carrying a finding

What this publisher told the store about itself, and the other listings that told it the same thing.

Publisher
Leaning Technologies Ltd
Declared legal entity
Leaning Technologies Limited
Registered address
3rd Floor, 207 Regent Street, London W1B 3HH, GB
Registered contact
Stefano De Rossi

Same store account

1 other listing published from this account, 100k+ users between them, none of them carrying a finding.

Same operator - 1 listing

Published under a different store account, but sharing the registered address, contact or declared legal entity this one gave the store.

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

Publishers can request a review.

Updated 15 October 2026achnhggjjhnadfapkmgallnbmemdojdi