MP4Joiner
MP4Joiner: A free desktop utility for straightforward, lossless MP4 joining on Windows and macOS. Ranked #44 of 65 in Video Merger Software by our editors (4.8/10); pricing: Free plan; best for users joining compatible MP4 files losslessly.
At a glance
- Editor score4.8 / 10
- PricingFree plan
- Best forUsers joining compatible MP4 files losslessly
- Free planYes
- Paid fromFree
- Lossless joiningYes
- Facts checked21 Oct 2026
Where it wins
- Joins multiple MP4 files into one without re-encoding
- Preserves quality during compatible lossless joining
- Includes MP4Splitter for dividing MP4 files
Where it doesn't
- Limited to MP4 joining and splitting
- Desktop-only, with no browser-based workflow
- Compatibility is required for lossless joining
Our verdict on MP4Joiner
MP4Joiner is a free, open-source desktop application for joining multiple MP4 files into one. It is aimed at people who want to combine compatible MP4s locally on Windows or macOS, without re-encoding or losing quality. The MP4Tools collection also includes MP4Splitter, which divides MP4 files. Its focus is deliberately narrow: it addresses joining and splitting MP4s rather than offering a broader video-editing workflow.
Lossless joining is the central reason to consider MP4Joiner. When the files are compatible, the application joins them without re-encoding, preserving their quality. That makes it a fit for straightforward file-joining tasks where avoiding a new encoding step matters. The compatibility condition is important: users who need to combine files that do not meet it may need another tool or workflow. MP4Splitter adds a complementary task, but does not change the product's MP4-specific scope.
The published offering is free and open source, distributed under the GNU General Public License, with Windows and macOS downloads and source code. It is a desktop application rather than a browser-based service, so it suits users who prefer local file handling. Community and ticket support channels are listed. Choose MP4Joiner for a focused, no-cost utility when compatible MP4 joining and splitting are enough; look elsewhere if you need a wider range of video formats or a broader editing workflow.
Your product? Our editors can test MP4Joiner in depth and publish a review, labelled as paid · from $149/mo →
MP4Joiner pricing
MP4Joiner fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Browser-based | No |
| Lossless joining | Yes |
| Desktop platforms | Cross-platform |
| Maximum output resolution | Not verified |
| Maximum file size | Not verified |
| Batch joining | Yes |
| Deployment | Desktop |
| Platforms | Windows, macOS |
| Support | Community, Tickets |
| Built for | Solo, Small business (editorial estimate) |
| Pricing | Free plan |
| Website | mp4joiner.org |
| Facts checked | 21 Oct 2026 |
Alternatives to MP4Joiner
- BandicutA Windows desktop editor for joining clips, with stream-copy mode for compatible files.9.3
- FFmpegA flexible command-line toolkit for stitching, converting, filtering, and streaming media.9.1
- MKVToolNixA free, cross-platform toolkit for precise MKV/WebM remuxing and extraction.9.0
See all MP4Joiner alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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