Software · Development

JD-GUI

A standalone graphical utility that displays Java sources from CLASS files.

Completely free
Linux
Open source

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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-3.0 — 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: LinuxEstablished by Linux: Flathub
Publisher: Java Decompiler project
Latest version: 1.6.6 (25 December 2019)
Latest activity: 18 September 2026
Source code: github.com/java-decompiler/jd-gui

Overview

JD-GUI is a decompiler, available on Linux.

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

“JD Java Decompiler” — official website, 10 November 2026

At a glance

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

Its licence (GPL-3.0) 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

JD-GUI is a standalone graphical utility that displays Java source codes of ".class" files. You can browse the reconstructed source code with the JD-GUI for instant access to methods and fields.

Description from Flathub — AppStream (Flathub)

Sources and checks

Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) — 9 November 2026
Facts collected from Official plan pages (pricing, licence, terms) (commercial use) — 9 November 2026
Last technical check: 7 November 2026
Description from Flathub — AppStream (Flathub)

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