MosaicPlayer
MosaicPlayer: multi video player
Play multiple videos at the same time, packed like a puzzle to fill your screen.
A free video wall and split-screen video player for Windows and Linux. A fast GridPlayer alternative.
Watch dozens of videos at once, side by side: open a folder and MosaicPlayer arranges every clip, portrait and landscape mixed, into a video mosaic that fills the screen, with a similar size for each video. No rows and columns to set up.
Inspired by GridPlayer, MosaicPlayer plays far more videos at once without stuttering: 60 or more, even in 4K or at 60 fps.
⬇ Download for Windows or Linux
Features
- Many videos, smooth playback. 60+ videos at once on a regular gaming PC, using the graphics card where it helps.
- Automatic puzzle layout. Vertical (phone) and horizontal videos fit together with almost no gaps. Choose equal sizes, balanced, or fill every pixel, or switch to rows, columns or a classic grid.
- Make any video bigger or smaller. The others move around it.
- Drag to swap, double-click to focus one video full screen, then come back to the exact same arrangement.
- Random start times so similar videos don’t play in sync, or sync them all to one video.
- Loop, next file in the folder, or a random file when a video ends.
- Playlists that remember positions, sizes and the layout. Opens
GridPlayer
.gplsand VLC.m3uplaylists. - Free and open source. No ads, no account, works offline.
Use it for
- a video wall or multiview screen on a second monitor or TV
- watching a folder of clips at once instead of one by one
- comparing takes, angles or edits side by side, in sync
- reference and practice videos (dance, sports, music) playing together
- background visuals for parties, streams or shop windows
Smooth with 5 videos or 50
 |
|
| 5 videos: every video at its full 24 fps, screen redrawn 60 times a second | 15 videos: full 24 fps each, 60 redraws a second |
 |
 |
| 48 videos: still full 24 fps each, 60 redraws a second | 120 videos, just for fun: it still plays (about 22 of 24 fps each), but the screen redraws less often, so this is past the comfortable limit |
Measured on an Intel Core i9-12900KF with an RTX 3090, using 480p–720p clips at 24 fps. Up to about 60 videos stay perfectly smooth on a PC like this.
Download and install
Windows 10 and 11: download MosaicPlayer-…-windows-setup.exe from the
latest release and
run it. Or take the portable .zip, unpack it and run MosaicPlayer.exe.
Windows may say the publisher is unknown: click More info → Run anyway.
Linux: download MosaicPlayer-…-x86_64.AppImage, then make it executable
and run it (Ubuntu 24.04, Linux Mint 22, Fedora 40 or newer):
chmod +x MosaicPlayer-*-x86_64.AppImage
./MosaicPlayer-*-x86_64.AppImage
Prefer to run it from source? See the technical notes.
How to use
- Drag videos or a whole folder onto the window (or press Ctrl+O).
- Press 1–5 to switch layouts, B for equal or fill-the-screen sizes.
- Point at a video and press + or − to resize it, or drag it onto another to swap them.
- Press Ctrl+S to save everything as a playlist.
Right-click anywhere for all options.
All keyboard and mouse shortcuts
| | | |---|---| | Click / double-click | pause one video / show it full screen | | Middle-click | mute or unmute one video | | Mouse wheel, ← → | jump 5 s back or forward (Shift: 30 s) | | Ctrl+wheel, Z | zoom into a video, reset zoom | | Drag a video onto another | swap them | | +, −, 0, Alt+wheel | bigger, smaller, normal size | | Space, M | pause all, mute all | | S, Y, Home | random times, sync all to this video, restart all | | N, Del | random video from the same folder, remove | | 1–5, B, R, C, [ ] | layout, tile sizes, reshuffle, crop, gap | | F or F11, T, Ctrl+M, H | fullscreen, stay on top, menu bar, stats | | Ctrl+O, Ctrl+Shift+O, Ctrl+U, Ctrl+L | open videos, folder, web address, playlist | | Ctrl+N, Ctrl+S, Ctrl+Shift+S | new, save playlist, save as | | Ctrl+, , F1 | settings, help |MosaicPlayer and GridPlayer
GridPlayer is a great app and the inspiration for this one. MosaicPlayer focuses on large, mixed collections:
| GridPlayer | MosaicPlayer | |
|---|---|---|
| Many videos at once | stutters on 30+ videos | smooth with 60+ |
| Layout | grid, rows and columns set by hand | automatic puzzle, rows, columns or grid |
| Portrait and landscape mixed | leaves big gaps | fills the screen |
| Resize one video | no | yes |
.gpls playlists |
yes | yes, both ways |
| Systems | Windows, Linux, macOS | Windows, Linux |
Measured with 32 videos on the same PC: smooth playback, 1.2 GB of memory instead of about 3 GB, and 97% of the screen used instead of 63% (details).
FAQ
How do I play multiple videos at the same time on Windows or Linux?
Install MosaicPlayer, then drop a folder of videos onto its window. All of them play at once, arranged to fill the screen.
Can I make a video wall or video mosaic for a second screen?
Yes. Move the window to that screen and press F for fullscreen. T keeps it on top of other windows.
Does it work with vertical videos (phone, TikTok, Shorts, Reels)?
Yes. Vertical and horizontal videos are fitted together automatically.
Which formats does it play?
Nearly everything: MP4, MKV, WebM, MOV, AVI, WMV, GIF and more, plus web addresses (with yt-dlp installed).
Do I need a powerful computer?
No. A few HD videos play on any recent PC. Dozens of HD videos or several 4K videos at once need a modern processor or graphics card.
Is it a GridPlayer fork?
No. MosaicPlayer is a separate app written from scratch, inspired by
GridPlayer. It opens and saves the same .gpls playlists, so you can use both.
Is it free? Does it collect data?
It’s free and open source. It doesn’t collect or send anything; it only goes online for web addresses you open and when you choose Help → Check for updates.
Help and feedback
Found a bug or have an idea? Open an issue. Help → Open log folder has a log file you can attach.
License
Free software under the GPL-3.0. Uses mpv and Qt; see third-party notices. Screenshots show Big Buck Bunny and Sintel © Blender Foundation, CC BY 3.0.