Software · Development

BlueJ

BlueJ is a code editor, available on Windows and Linux: debugging.

Completely free
Windows and Linux
Open source

Ad-supported exit link (Clictune): an intermediate page may show for a few seconds before the official website. Direct link to the website, no intermediate page

Download from the official source

Link to the official download page, ad-supported (Clictune): an intermediate page may show for a few seconds. Direct link to the download

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Geographic availability: No geographic restriction found in our sources; availability is not checked country by country.

Technical details

Pricing: Completely freeconfirmed by Flathub
License: GPL-2.0 WITH Classpath-exception-2.0 — Open source (copyleft)confirmed by Flathub
Open source: Yes
Commercial use: Yesconfirmed by Flathub, Official plan pages (pricing, licence, terms)
Account required: not documented
Credit card required: Noconfirmed by Flathub
Watermark: Not applicable
Ads: not documented
Platforms: Windows and LinuxEstablished by Linux: Flathub · Windows: Winget
Publisher: King's College London
Latest version: 6.0.0 (1 July 2026)
Latest activity: 19 September 2026
Source code: github.com/k-pet-group/BlueJ-Greenfoot

Overview

BlueJ is a code editor, available on Windows and Linux.

Features described in its Flathub listing: debugging.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information

“Java IDE for beginners” — Flathub, 10 November 2026
“It provides a basic debugger and GUI-based method calling.” — Flathub, 10 November 2026

At a glance

All of BlueJ is free: no feature is locked behind a paid plan, and its code is open.

Its licence (GPL-2.0 WITH Classpath-exception-2.0) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

Open source code
Commercial use allowed

About

BlueJ is an education-focused interactive Java IDE. It provides a basic debugger and GUI-based method calling.

Description from Flathub — AppStream (Flathub)

Sources and checks

Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) — 10 November 2026
Facts collected from Official plan pages (pricing, licence, terms) (commercial use) — 7 November 2026
Facts collected from Winget (Windows Package Manager) (source code, publisher, platforms, version) — 6 November 2026
Last technical check: 6 November 2026
Description from Flathub — AppStream (Flathub)

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