Desktop
Neptune 9.1 (20260314)
Download the official Neptune 9.1 (20260314) ISO (desktop) from the project's own servers, with checksum and USB steps. Neptune is a Debian stable-based…
Download files are served by the Neptune project or its mirrors, not by IsosLinux.
Choose your download
All images
Choose the image that matches your architecture and use case.
Before you install
Read the release notes and installation guide before downloading. Select an image that matches the processor architecture and intended use: desktop, server, live media, virtual machine or another published edition. Test Wi-Fi, graphics, audio, storage and suspend from live media when that option is available. Back up important files before repartitioning, encryption changes or dual-boot installation. Download from an official project page or mirror, compare the published SHA-256 checksum, and verify a signed checksum when the project provides one. After installation, apply updates before adding third-party repositories or drivers.
- 1Check the SHA-256
Compare the file with the checksum published by Neptune. If it does not match, download it again.
- 2Write it to a USB drive
Use Ventoy, balenaEtcher, Fedora Media Writer or Rufus. Copying the ISO as a normal file does not work.
- 3Boot from the USB
Open the boot menu (often F12, F10 or Esc) and choose the USB drive in UEFI mode. Back up your data first.
About Neptune
Neptune is a Debian stable-based desktop distribution focused on a polished KDE Plasma environment and multimedia use. Release 9 is delivered as a live and installable amd64 image. This entry selects the official image built on 14 March 2026 and links the signature exposed by the project download page.
Who is it for?
Neptune is primarily suited to daily desktop use, study, web browsing and productivity. Before choosing it, compare the current release lifecycle with the length of support required for the machine. This distribution is based on debian, which influences package formats, repositories and much of the available documentation. The listed desktop environment is KDE Plasma; confirm its memory, graphics and accessibility requirements on the official project site. The best choice depends on hardware support, preferred software, update policy and the amount of system administration the user wants to perform.
Advantages and limitations
Advantages
- Benefits from the package ecosystem and documentation associated with its debian lineage.
Limitations
- Hardware support, upgrade policy and available editions should be confirmed in the current official documentation.
Neptune download questions
Which Neptune ISO should I download?
IsosLinux lists the desktop ISO for laptops and PCs, with a live session and graphical installer. Most people installing on a computer want the desktop ISO. Other editions and architectures are listed under All images.
Is the Neptune download official?
Yes. The download buttons open files on download.neptuneos.com, the project's own server or official mirror. IsosLinux only lists the link and counts the click; it does not host or modify the image.
How do I check that the Neptune ISO is not corrupted?
Compare the SHA-256 checksum of your file with the one published by Neptune. On Linux run sha256sum on the file, or use the IsosLinux ISO checksum verifier, which works locally in your browser.
What is Neptune based on?
Neptune is based on debian, so most software and guides for debian also apply.
Which desktop does Neptune use?
The default desktop listed for Neptune is KDE Plasma.