Datamoshing guide
Datamoshing tools compared
Want the datamosh look fast on Windows, no After Effects involved? MOSH_UNIT is the simplest option: draw effects onto a clip and export, for $7.99. Want it free and do not mind getting technical? Avidemux and ffmpeg datamosh by hand. After Effects can do it too, just bring a subscription and a plugin. Full comparison below.
Datamoshing tools at a glance
| Tool | Price | Runs on | Ease | Effects | Needs After Effects? |
|---|---|---|---|---|---|
| MOSH_UNIT | $7.99, one-time | Windows 10/11 | Beginner: draw on the clip | Bloom, Freeze, Reverse, Shuffle (stackable) | No |
| After Effects + plugin | Subscription | Windows, macOS | Advanced: layers and keyframes | Manual, or via a datamosh plugin | Yes |
| Avidemux | Free | Windows, macOS, Linux | Technical: delete keyframes by hand | Classic melt and bloom | No |
| ffmpeg | Free | Windows, macOS, Linux | Expert: scripted commands | Anything you can script | No |
MOSH_UNIT
I built this because doing the byte-level editing by hand in Avidemux got old fast. You draw named effects (Bloom, Freeze, Reverse, Shuffle) directly onto a clip, stack them, reorder them, and export an MP4 with the audio still in sync. It is real byte-level datamoshing, no AI, and it works fully offline. Built for people who want the look quickly without learning After Effects or the command line first. $7.99, one-time, no subscription.
Adobe After Effects
The industry-standard compositor, full stop. It can produce datamosh looks with a paid third-party plugin or careful manual work, and it is genuinely powerful for everything around the effect too, grading, compositing, all of it. The trade-offs: an ongoing subscription and a steep learning curve. Total overkill if datamoshing is literally all you are after.
Avidemux
A free, cross-platform video utility. With the right codec, you delete keyframes by hand to get the classic melts and blooms. It is the traditional free route, and it genuinely works, but it is manual, fiddly, and gives you zero preview until you actually play the file back.
ffmpeg
A free command-line powerhouse, re-encodes and manipulates frames however you script it. Maximum control, fully automatable, but there is no interface and no visual feedback at all. Built for people already comfortable living in a terminal.
Which datamoshing tool should you use?
- You want the look fast, on Windows, without learning software: MOSH_UNIT.
- You want it free and you know your way around codecs: Avidemux.
- You want to script or batch it: ffmpeg.
- You already work in After Effects daily: an After Effects plugin.
Questions
- What is the best datamoshing tool?
- Depends what you are optimizing for. Fastest result on Windows with no After Effects: MOSH_UNIT. Free and you do not mind driving it by hand: Avidemux or ffmpeg. Honestly, there is no single best tool here, just the best fit for your platform, budget and patience level.
- Is there a free datamoshing tool?
- Yes. Avidemux and ffmpeg are both free and datamosh fine through manual keyframe removal or scripting. They are more technical than a purpose-built app like MOSH_UNIT, but they do not cost you a cent.
- What formats does MOSH_UNIT support?
- MOSH_UNIT reads pretty much every common video format, MP4, MOV, AVI, MKV, WebM and more, through the bundled FFmpeg. It always exports MP4 at the highest quality, and your audio stays intact.
- Does MOSH_UNIT run on Mac or Linux?
- No, Windows only right now: 64-bit Windows 10 and 11. No macOS or Linux build exists. FFmpeg comes bundled in, so there is nothing extra to install on top.
- How much does MOSH_UNIT cost?
- $7.99, one-time, while it is in early access. Regular price bumps to $9.99 after launch. No subscription, ever.