Let us start with the honest answer: there is no official pre-built Linux package of MP4Joiner. The MP4Tools 3.8 release (20 November 2019) ships exactly three files — a Windows installer, a Mac disk image and a source tarball. The SourceForge project page lists Linux among the operating systems the source code can target, but the project has never published a ready-to-install Linux binary, an AppImage, a Flatpak or a Snap. Any site offering you a “MP4Joiner for Linux download” as a finished package is not offering an official file.

Option 1: Build from the official source package

The official route on Linux is compiling the source package yourself:

• File: MP4Tools-3.8.tar.bz2 · Size: 310,988 bytes
• SHA-256: 6a64d4c02b84affb6b6e1f17aaca78a41d319576b7f428b50b55a6ba2ce64b3e
• Download: /go/mp4joiner-source (official file on SourceForge — the same verified package listed on our download page)

Unpack the tarball and follow the INSTALL / README instructions inside the package — those are the authoritative build steps for this release. The build is a conventional C++ / wxWidgets one and typically follows the familiar extract → ./configure → make → install flow, but treat the package’s own documentation as the source of truth if anything differs. You will need the development libraries the tarball’s documentation names — expect the wxWidgets toolkit and the media back-ends the suite shells out to, notably ffmpeg and MP4Box (from GPAC), which are what actually perform the joining and splitting. Install those from your distribution first, then build.

One expectation to set: version 3.8 dates from 2019, so a modern distribution’s newer compilers and library versions may need small adjustments that a 2026-era package would not. That is the normal cost of building unmaintained — but perfectly functional — open-source software from source.

Option 2: Check your distribution’s repository

Some distributions package community builds of older MP4Tools versions in their own repositories. If yours does, installing from the repository is simpler than compiling — but verify two things before trusting it: that the package really is MP4Tools / MP4Joiner (and not a different tool trading on the name), and which version it carries, since repository builds can lag behind or predate 3.8. We are not naming specific package names here because repository contents change and differ per distribution; a quick search in your package manager for “mp4tools” or “mp4joiner” will tell you whether your distribution offers one.

What you get once it runs

A Linux build from the official source is the same program Windows and Mac users get: MP4Joiner joins MP4 files by direct stream copy — lossless and fast when the clips share the same encoding parameters — with a force re-encoding fallback for mismatched clips, and MP4Splitter installs alongside it for cutting files apart. The workflow is the one in our how to join MP4 files guide: add clips, order them with the arrows, click Join.

Not on Linux? Use the build made for your system

Windows users should use the official 32-bit installer — there is no separate 64-bit build, and the 32-bit package runs fine on 64-bit Windows; see the Windows guide. Mac users get a proper disk image for OS X 10.10 and later (a 2019 Intel-era build; Apple Silicon support is not officially verified); see the Mac guide. The version history confirms 3.8 is the final release on every platform — Linux is not missing a newer edition, because there isn’t one.

They are not competing products, and you do not have to choose between them. MP4Joiner is one program; MP4Tools is the suite that contains it. When you “download MP4Joiner”, what you actually download is the MP4Tools installer.

The relationship, plainly

• MP4Tools = the suite (and the installer package), by Alex Thüring, free and open source under the GNU GPL.
• MP4Joiner = the suite’s merging program: it joins multiple MP4 files into one, without re-encoding when the clips share encoding parameters.
• MP4Splitter = the suite’s splitting program: it divides one file into parts. It joined the suite in version 3.0 (2015); before that, MP4Joiner stood alone.

Why the filenames say MP4Tools

The current release files are named MP4Tools-3.8-win32.exe, MP4Tools-3.8-MacOSX.dmg and MP4Tools-3.8.tar.bz2 because the package being versioned and shipped is the suite: version 3.8 of MP4Tools, released 20 November 2019. Installing any of them gives you both programs at once — there is no separate “MP4Joiner-only” installer to hunt for, and a file named like a standalone MP4Joiner installer did not come from the project.

Which name should you search for?

Either lands in the right place: the project is hosted on SourceForge under the MP4Joiner name, while its downloads carry the MP4Tools name. For the files themselves, use our download page; for the splitting half, see MP4Splitter; and for the release timeline behind the naming, see the version history.

No — there is no official portable version of MP4Joiner. The project’s SourceForge release for the current version, MP4Tools 3.8, contains exactly three files: a Windows installer (MP4Tools-3.8-win32.exe), a Mac disk image (MP4Tools-3.8-MacOSX.dmg), and the source archive (MP4Tools-3.8.tar.bz2). No ZIP-and-run portable build exists among them.

The PAD confusion, cleared up

The official website’s download area mentions a “Portable Application Description”. That is a PAD file (pad.xml) — a standard metadata description that software directories use to describe a program. “Portable” in that name refers to the description format being portable between directory sites, not to a portable edition of the software. It is not a download you can run.

What about portable repacks on other sites?

Third-party sites do offer “MP4Joiner portable” repacks. We have not verified any of them, we do not endorse them, and we will not link them: an unofficial repack of an installer-based program can bundle anything, and there is no official hash to check it against. The verifiable official Windows file is the installer above (24,156,961 bytes; SHA-256 e369f3c39e74ca6e106767817b63179c59d030497dde01cfb1e9f64393a0247b).

Safe alternatives

• Just install it. The normal install is quick, free (GNU GPL), and installs both MP4Joiner and MP4Splitter — see MP4Joiner for Windows.
• Build from source. The official source archive is the route for anyone who wants full control over what runs on their machine.
• Check the release record. The version history shows every official release since 2015 — no portable edition appears in any of them.

Questions about formats, lossless joining, and system support are answered in the FAQ; downloads for all platforms are on the download page.