Real personality for
Your Computer
Mischief is the open-source platform for desktop entertainment. Featuring 19 Flagship Companions (Zen, Kumo, Astra, Barnaby, Pippin, Pocus, Byte, Whiskers, Spectra...), Always-On Drag-to-Move, 6 Playful Behaviors (spin, pounce, sneak, dance, hide, peek), Custom Image Cutout Import, anti-repeat speech, and GIF moment capture for Windows, macOS & Linux. 100% offline with zero telemetry.
100% Free & Open Source (MIT). No accounts, no ads, no telemetry.
19 Flagship Companions
Every companion brings unique species-themed dialogue pools, playful animations, and distinct personality traits to your desktop.
Zen
Peaceful & wise companion that encourages focus and mindful breaks during busy workdays.
Kumo
Tech-savvy cyber fox that perks up when you write code, commit to git, or pass tests.
Astra
Majestic cosmic dragon that leaves sparkling trails as it wanders across your screen.
Barnaby
Ultra-chill capybara that loves taking long naps in the bottom corner of your screen.
Pippin
Energetic waddling penguin that performs happy bounces whenever you pet it.
Pocus
Playful little ghost that floats around your windows with cute "Boo!" dialogue bubbles.
Byte
Retro desktop bot that speaks in fun "Beep boop~" chimes and monitors system idle state.
Nami
Curious sea otter that floats along your taskbar and offers hydration reminders.
Pixel-Rex
Nostalgic 8-bit dinosaur that sneaks across your desktop and pounces on idle windows.
Lumina
Radiant phoenix with glowing particle effects that celebrates major milestone wins.
Mochi
Adorable shiba inu wearing a baker chef hat that offers cheerful motivational quips.
Voxel
Futuristic mecha cat with glowing visor animations and playful pounce behaviors.
Bramble
Shy hedgehog that curls into a ball when startled and peeks out when you return.
Sola
Bright floral companion that tracks daytime hours and brightens up your desktop.
Whiskers
The original cat companion — purrs, yawns, and curls up for naps after inactivity.
Spectra
Mystical phantom companion with smooth floating physics and a transparent glow.
Sparky
High-energy robot buddy that spins, dances, and celebrates developer git commits.
Pixel
Retro gaming sprite companion that brings classic arcade vibes to your workspace.
Bloop
Playful fluid creature that squashes and stretches as it wanders across screens.
The open-source desktop entertainment platform
Mischief brings delight, customization, and real-time interaction back to your desktop with zero tracking.
19 Flagship Companions
Choose from 19 built-in companion packs — each with custom species dialogue, unique speech pools, and distinct personality traits.
Always-On Drag-to-Move
Grab your companion at any time and place it anywhere on your screen. Smart 5px threshold separates click-to-pet from drag-to-move.
6 Playful Behaviors
Six system-level behaviors (hide, peek, spin, pounce, sneak, dance) run for every companion — including custom imported images — with procedural canvas animation.
Custom Cutout Import
Import any image (PNG, JPG, WebP, GIF). Built-in background cutout tool, Keep/Remove brushes, and expression anchors animate your own pet, logo, or mascot.
Personality Speech Engine
Species-themed dialogue pools plus an anti-repeat chatter engine keep companion chatter fresh, natural, and context-aware.
100% Offline & No Telemetry
Zero network calls, zero tracking. Everything runs locally on your machine across Windows, macOS, and Linux.