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Split one video across a grid of phones, tablets, laptops or TVs. Each screen shows its own piece, and a shared clock keeps every piece on the same frame.
To make a video wall without special hardware, put the same video file on every screen, open this page on each, start a room with Video wall switched on and a grid such as 2×2, then tell each screen which tile it is. The picture is cut into pieces in each browser and the room’s shared clock keeps every piece showing the same frame, so motion flows from one screen to the next.
It’s free video wall software in the simplest sense: no controller box, no signage subscription, nothing to install. It suits a 2×2 wall of tablets at a stand, a row of three TVs behind a band, an art piece made of old phones or a classroom experiment. It does not schedule playlists or manage screens remotely the way commercial signage systems do, and it says so below.
If you want the same whole picture on every screen instead of one picture split up, that’s the plain sync player. For an audience in different homes, see the watch party guide.
Copy the same video file to each device. On each one, open this page and drop the file onto Drop the video to play in sync.
On one device press Start a room. Under Video wall, turn on Split the picture across screens, choose a Grid (2×2, 3×3, 3 in a row, 2 side by side or Custom with Columns and Rows), then press Create room.
On every other screen press Join a room and enter the Room code. Then, under Which screen is this?, tap the tile that matches where that screen sits in the wall.
Raise Gap between screens until a straight line in the picture crosses from one screen to the next without a step. Choose Fill the wall to crop to the wall’s shape or Whole picture to keep everything visible.
Press Full screen (F) on each screen, then Play for everyone on the host. Turn on Loop the video for a display that runs all day.
The grid describes how the screens are arranged, not how many you happen to have. A 2×2 wall needs four screens of the same size in a square; 3 in a row is three side by side, a favourite behind a stage; 2 side by side makes a wide picture from two laptops. Custom allows up to eight columns and eight rows.
| Grid | Screens | Works well for |
|---|---|---|
| 2 side by side | 2 | A cinematic wide shot over two laptops or monitors |
| 3 in a row | 3 | A panorama behind a band, a long shop window |
| 2×2 | 4 | Tablets or TVs on a stand; the classic small wall |
| 3×3 | 9 | A big feature wall from matching TVs or tablets |
| Custom | up to 64 | Odd shapes: a column of phones, a 4×2 strip |
Each tile is cut assuming the screens are the same size and the same way round. Mixing a tablet and a phone in one wall makes one tile smaller than its neighbours. Turn every device to the same orientation and lock its rotation before you join, so a nudge doesn’t swap a tile.
Real screens have frames round the picture, and a wall built from them has a band of plastic between every tile. If each tile simply showed its quarter of the video, anything crossing that band would jump: a horizon would step, a ball would teleport. Gap between screens tells the wall how wide that band is, as a share of one screen’s width (0 to 15 per cent), and leaves that strip of the picture out, as if you were looking through a window frame.
A wall that runs for an afternoon needs a little more than a good picture. A few practical habits help:
On iPhone, full screen hands the video to the phone’s own player, which shows the whole picture and drops the tile crop; for a wall, leave iPhones in the page view instead of full screen. Built-in smart-TV browsers vary: many can’t open a local file or play smoothly while their speed is nudged. A small computer or a laptop connected to each TV by HDMI is the dependable way to put TVs in a wall.
Dedicated video wall systems drive panels from a controller or networked players, and manage content centrally: playlists, schedules, remote monitoring, many walls from one dashboard. They are built for permanent installations and priced for them. This tool does one thing: play one video file across ordinary screens in sync, free, for as long as the room is open (up to 12 hours). For an event, a stand, a classroom or a one-off art piece, that is often all you need; for a wall in a lobby that must run unattended for years, a signage system is the right tool.
Several screens placed edge to edge so they show one large picture, each displaying its own part of it. They are used in shops, control rooms, stages and exhibitions, usually with special panels and controllers; here the same idea works with ordinary devices.
Yes, as a 2×2 grid. Connect a laptop, tablet or small computer to each TV, put the video file on each, join them to one room and give each its tile under Which screen is this?. Matching TVs give the cleanest result.
For a seamless picture, yes. Each tile is an equal slice of the video, so a smaller screen shows its slice smaller and the picture breaks at that edge. Mixed screens still play in sync; they just won’t join up perfectly.
You can’t hide them, but you can stop the picture jumping across them. Raise Gap between screens until straight lines run straight from one screen to the next; the part of the picture behind each frame is skipped.
Yes. With Sound set to Only the host, one device plays the soundtrack (connect it to a speaker) and the others stay silent, which avoids a muddle of echoes. Every device plays sound everywhere.
No. Each screen plays its own copy of the file and crops its own tile. Only play, pause and clock messages pass between the devices.