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NullClipper

Windows 10 · Windows 11

NullClipper for Windows

A free, open-source tray app for snips and short GIFs of anything on screen — with an optional one-click upload to NullImage, encrypted before it ever leaves your PC.

Download installerPortable .zip

Windows 10/11 x64 · needs the .NET 8 Desktop Runtime · MIT licensed · just need the current tab? try the extension

NullClipper's capture overlay: dimmed screen, the Snip/GIF toolbar with region, freeform, window, and fullscreen modes, and a rectangular selection with a live size badge

What it does

  • Snip anything on screen

    Region, freeform, a single window, or the whole monitor. The overlay covers every display and freezes the frame so nothing moves while you drag.

  • Stills or short GIFs

    Snip copies a PNG. Switch to GIF in the same toolbar to record up to 8 seconds at 12 fps, longest side capped at 640px so files stay small.

  • Straight to the clipboard

    No editor, no save dialog. A toast confirms the capture with a thumbnail — paste it into chat, an editor, anything that accepts an image.

  • Or an encrypted link instead

    Turn on NullImage and a snip is encrypted on your PC with the same AES-256-GCM scheme as nullimage.org — the share link is copied instead of the image, with expiry, burn-after-view, and password options.

  • Your hotkey, your way

    Ctrl+Shift+X by default. Click the hotkey field in Settings and press the keys you want; Esc keeps the old one.

  • Lives in the tray

    Left-click the tray icon to capture, right-click for Settings or Exit. Single-instance, optional launch at Windows startup.

NullClipper's Settings window: Snip/GIF mode, the hotkey recorder, start with Windows, and NullImage upload options
The confirmation toast after a capture: a thumbnail and 'Snip saved to clipboard, 376 × 280'
Every capture confirms itself with a thumbnail.

Controls

Ctrl+Shift+XOverlay appears over a frozen screenshot
DragRectangular (or freeform) selection
Click a windowSnips that window's bounds, in window mode
Fullscreen buttonThe whole monitor
Esc / right-clickCancel

Install

  1. 1

    Install the .NET 8 Desktop Runtime

    If you don't already have it — a one-time install from dotnet.microsoft.com.

  2. 2

    Run NullClipper-Setup.exe

    Double-click, Next, Finish. Prefer no installer? Extract the portable zip anywhere and run NullClipper.exe.

  3. 3

    Look for the tray icon

    It appears near the clock with a “NullClipper is ready” balloon. Press Ctrl+Shift+X to snip.

All downloads: latest GitHub Release · full walkthrough: docs/install.md · source

The only network call NullClipper ever makes is the optional NullImage upload — to the same public API every browser upload uses. No account, no API key. Settings, including any password you set, stay in %AppData%\Clipper\settings.json on your PC.