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CheerpJ Applet Runner

Chrome extension by Leaning Technologies Ltd · Productivity · Workflow

  • Established publisher
  • Trader

A Chrome extension in Productivity · Workflow with 100 000 users, a widely installed extension.

No site access is declared in the manifest, so it cannot read the pages you open on its own.

What the developer says, and 5 screenshots

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
100 000
Rating
4.5 (285 ratings)
Users, last 16 days
unchanged
Rating, last 30 days
Not watched long enough to say
Version
2026.9
Updated in the store
2026-09-09
Published
2017-05-15
Manifest
V3
Browser access
5 permissions

How it has moved

Users
unchanged since 31.08
100k · 2 readings
2026-09-02: no longer featured2026-09-02: gained the good publisher record badge
  1. 2026-08-31100k
  2. 2026-09-15100k
Rating
unchanged since 31.08
reviewsrating 4.54 · 2 readings
2026-09-02: no longer featured2026-09-02: gained the good publisher record badge
  1. 2026-08-31reviews285rating4.54
  2. 2026-09-15reviews285rating4.54
Users
unchanged since 31.08
100k · 2 readings
2026-09-02: no longer featured2026-09-02: gained the good publisher record badge
  1. 2026-08-31100k
  2. 2026-09-15100k
Rating
unchanged since 31.08
reviewsrating 4.54 · 2 readings
2026-09-02: no longer featured2026-09-02: gained the good publisher record badge
  1. 2026-08-31reviews285rating4.54
  2. 2026-09-15reviews285rating4.54

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing more than once a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

No site access is declared in the manifest, so it cannot read the pages you open on its own.

  • Block or redirect requests on the sites it can access declarativeNetRequestWithHostAccess
  • Run its own code on the pages it can access scripting
  • Act on the current tab, but only after you click it activeTab
Show the remaining 2
  • Schedule work to run later alarms
  • Store data in your browser storage

The full permission history for this extension

What changed recently

  1. Store badges changed

The publisher

Leaning Technologies Ltd publishes 3 listings we track, 106k users between them. Listed website: cheerpj.com.

  1. CheerpJ JNLP Runner Leaning Technologies Ltd · Productivity · Tools · published 2024-02-29 6k users ★ 3.0
  2. CheerpX Games Runner Beta Leaning Technologies Ltd · Lifestyle · Games · published 2024-08-21 193 users

Like this one

Listings the catalog judges closest in what they say they do.

  1. CheerpJ JNLP Runner Describes nearly the same job, smaller audience 6k users ★ 3.0
  2. Phoenix AWR - Java Applets Runtime Describes a similar job, smaller audience 40 users
  3. Ak Kamal e-Security Client Loader Describes a similar job, with an established audience 80k users ★ 3.2
  4. DirPlayer - Shockwave Emulator Describes a similar job, smaller audience 2k users ★ 5.0
  5. ICRON ClickOnce Describes a similar job, smaller audience 380 users ★ 5.0

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

Is this your extension?

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Figures come from our own daily pass over the public Chrome Web Store listing, last read on . We publish no contact details for extension developers.