A desktop application designed to optimize the creation workflow for game pixel animations like walking sprites

Convert multiple frames with consistent pixel settings to efficiently create unified animation assets. Perfect for transforming hand-drawn animations into game-ready pixel art.

The conversion functionality uses nearly the same logic as my web version. Try the conversion quality for free on our web version: https://uhiyama-lab.com/tools/image-to-pixelization/

This desktop app adds practical 2D game development features (multi-frame support, animation preview, sprite sheet export, etc.) to the core conversion process. Setting files (.json) can be exported, making it easy to restore settings when re-converting modified artwork.

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🎯 Perfect for

• 2D Game Developers: Create animation sprites efficiently
• Indie Game Developers: Import hand-drawn animations into games
• Pixel Artists: Produce multiple frames with consistent quality
• Solo/Small Team Developers: Create high-quality assets on a budget

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✨ Key Features

🎮 Optimized for 2D Game Development

• Multi-frame batch conversion (impossible with web version)
• Animation preview in pixelized state (adjustable playback speed)
• Automatic sprite sheet generation (up to 20 frames, game engine ready)
• Consistent quality assurance (maintains consistency across frames)
• Transparent PNG output (ready for Unity, Godot, Unreal Engine)

🎨 High-quality Conversion (Same as Web Version)

• Advanced smoothing algorithm (same quality as web version)
• Adaptive noise reduction (beautiful results even in dark areas)
• 3-level outline adjustment (weak, standard, strong)
• Real-time preview (instant feedback on setting changes)

⚡ Streamlined Game Development Workflow

• Drag & drop support (intuitive image addition and reordering)
• Settings file save/share (maintain quality consistency in teams)
• Batch processing (convert multiple images at once)
• Multilingual UI (Japanese/English support)

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🛠️ Technical Specifications

Supported Formats

• Input: PNG, JPG, JPEG, GIF, BMP, WebP (all major image formats)
• Output: PNG (transparent background support) + JSON settings file

Processing Capabilities

• Max canvas size: 1500×1500px ※Larger sizes are automatically resized
• Pixel size range: 1-30px (fine-tunable for different purposes)
• Sprite sheet: 5-column fixed grid, up to 20 frames supported

System Requirements

• Windows: 10 or later (64bit) - Tested and verified
• Memory: 4GB+ (8GB recommended)
• CPU: Intel Core i3 equivalent or better
• Disk space: 100MB+ free space

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📋 How to Use (Master in 5 Minutes)

1. Prepare Images
   Prepare each frame of your hand-drawn animation as individual image files
2. Load into App
   Drag & drop images in batch, adjust order as needed
3. Configure Pixelization
   - Use auto-suggested optimal values (or adjust to taste)
   - Set output size (match your game resolution)
   - Choose outline strength
4. Preview Animation
   Desktop exclusive: Preview animation in pixelized state, fine-tune settings
5. Export
   - Save individual frames OR generate sprite sheet
   - Settings file automatically included

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🎯 Use Cases & Recommended Settings

2D Fighting Games

• Purpose: Character walk/attack/defense animations
• Recommended: Pixel size 4-6px, Canvas 128×128px

Platformer Games

• Purpose: Player character jump/run animations
• Recommended: Pixel size 3-5px, Canvas 64×64px

RPG Games

• Purpose: NPC idle/walk animations
• Recommended: Pixel size 2-4px, Canvas 32×48px

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🎮 Game Engine Integration

Unity

Individual Frames:

1. Drag & drop output PNG files to Assets folder
2. Change Texture Type to Sprite
3. Control with Animation Controller

Sprite Sheets:

1. Drag & drop sprite sheet to Assets folder
2. Change Texture Type to Sprite (2D and UI)
3. Change Sprite Mode to Multiple
4. Open Sprite Editor, use Slice button for auto-division
5. Apply, then control frames with Animation Controller

Unreal Engine

1. Import sprite sheet to Content Browser
2. Create Paper2D Sprite
3. Use PaperZD plugin for animation control
4. Create animation with Paper2D Flipbook
5. Control playback via Blueprint

Godot

1. Import PNG files to project
2. Use directly with AnimationPlayer
3. Create AnimatedTexture resource

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💡 Pro Tips for Efficient Workflow

Image Preparation

• Resize source images to 1000×1000px or smaller (improves processing speed)
• Use transparent or solid color backgrounds
• Enhance contrast for better results

Settings Management

• Reuse settings files (JSON) for similar characters
• Save settings per project
• Share settings with team members for consistency

Quality Enhancement

• Adjust pixel size based on intended use
• Fine-tune outline strength for desired look
• Use preview to check details
• Use identical settings for same character

Keyboard Shortcuts

• Ctrl+O: Open file selection dialog
• Space: Play/pause animation
• Ctrl+S: Save current frame
• Ctrl+Shift+S: Save all frames

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📦 What's Included

Executable + Complete Documentation

• AnimSprite Pixelizer.exe (main executable)
• USER_GUIDE.txt
• README.txt

Ready-to-Use Sample Assets

• Slime movement animation (4-frame sequence)
• Quick start guide (master basics in 5 minutes)
• Sample images free to use (commercial/non-commercial, perfect for prototypes)

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🛡️ License Agreement

Asset Usage Rights

• Images converted with this software may be used for any purpose, commercial or non-commercial

Copyright Notice

• This tool is designed primarily for converting your own artwork
• Converting and publishing third-party copyrighted material without permission may constitute copyright infringement
• Obtain necessary permissions when converting others' work

Prohibited Activities

• Redistribution of the application itself is prohibited
• Modification or reverse engineering of the application is prohibited
• Using the application for illegal activities is prohibited

Updates

• New features and bug fixes will be distributed as package updates become available
• Updates are provided free of charge
• Please re-download from the distribution page for the latest version

Privacy & Security

• This application operates completely offline
• Image data and artwork are never transmitted to external servers
• No user personal information is collected

Disclaimer

The developer assumes no responsibility for any damages arising from the use of this software. Use at your own risk.

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👨‍💻 Developer Info

AnimSprite Pixelizer v1.0.0
Copyright (c) 2025 Uhiyama (UhiyamaLab)

Developer: Uhiyama (UhiyamaLab)
Website: https://uhiyama-lab.com/
X(Twitter): @uhimble

Web Version Tool: https://uhiyama-lab.com/tools/image-to-pixelization/