Wallpaper Splitter
Multi-monitor utility

Split one wallpaper cleanly across every monitor on your desk.

A free, browser-based wallpaper splitter that detects your displays, lets you align a single image across the full canvas, and exports a per-screen PNG for each monitor at its native pixel resolution.

100% client-side HiDPI / Retina aware Bezel compensation ZIP export

Monitor layout

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Image

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PNG · JPG · HEIC · TIFF

Bundle as ZIP

What this tool does

Wallpaper Splitter takes a single high-resolution image and produces one wallpaper per monitor, sized for each display's native pixel dimensions. The crops align so that, when applied as desktop wallpapers, the original image appears unbroken across your full multi-monitor canvas.

Multi-monitor setups don't share a single wallpaper file: each display reads its own image. Operating systems can stretch one image across screens, but the result is usually distorted or misaligned. This tool solves that by slicing the image at the correct coordinates and resolution for each monitor.

How it works

  • Detects your monitors and their physical arrangement via the Window Management API.
  • Renders a true-scale preview of the combined desktop canvas.
  • Lets you pan and zoom the source image to compose the framing you want.
  • Optionally adds a bezel offset (gap in pixels) so the wallpapers line up correctly across physical screen bezels.
  • Exports a PNG per monitor at width × devicePixelRatio resolution, optionally bundled into a single ZIP.

All processing runs in your browser using HTML Canvas. Images are never uploaded to a server.

Who it's for

  • Developers and designers running dual or triple monitor setups.
  • Streamers and content creators with mixed-resolution displays.
  • Anyone with an ultrawide plus a portrait secondary who wants one cohesive wallpaper.

Frequently asked questions

How do I split one wallpaper across multiple monitors?

Open Wallpaper Splitter, allow screen detection when prompted, drop in your image, pan/zoom to position it across the detected layout, then click Download wallpapers. Each monitor receives its own correctly-sized PNG.

Does it upload my image?

No. The tool is fully client-side. Your file is loaded into a hidden canvas and processed locally — nothing is sent to a server.

Which browsers work?

Automatic multi-monitor detection requires the Window Management API: Chrome 100+, Edge 100+, and Opera 86+. Firefox and Safari currently lack support, but you can still use the tool in single-display mode or add monitors manually.

How do I compensate for monitor bezels?

Use the bezel slider in the preview controls to add pixel offsets between displays. The visual gap between physical monitors gets cropped from the image so the wallpapers line up across screens.

What resolution are the exported files?

Each monitor exports at its logical width and height multiplied by devicePixelRatio. For a 2560×1440 display at 2x scale, the output is 5120×2880 — full Retina sharpness.

Can I use it for portrait or rotated monitors?

Yes. The Window Management API reports each display's orientation, and the tool crops accordingly. Rotated and stacked layouts are supported.