ZeleSprites

ZeleSprites is a high-performance, native desktop texture packer and sprite animation studio built for indie game developers, pixel artists, and anyone working with 2D sprite assets.

Drop your sprites in, pack them into optimized texture atlases, preview animations in real time, and export to the format your engine needs — all without leaving the app.

⚡ Key Features

🧩 Smart Texture Packing

• MaxRects 2D bin packing algorithm (written in Rust) with Best-Short-Side-Fit heuristics for optimal space usage
• Automatic alpha trimming — transparent borders are detected and cropped while preserving original offsets (spriteSourceSize)
• Seam-fix extrusion — edge pixels are extruded to prevent bilinear filtering artifacts in game engines
• Power-of-2 (POT) textures — generate GPU-friendly sizes (512, 1024, 2048, 4096, 8192 px)
• Square atlas option for engines that require 1:1 aspect ratio textures
• Configurable padding between sprites

🎬 Built-in Animation Studio

• Real-time animation preview with looping playback
• Interactive timeline with smooth scrolling and frame-by-frame navigation
• Onion skinning to visualize previous/next frames
• Ping-pong mode for back-and-forth animations
• Adjustable FPS from 1 to 60 frames per second

🔍 Interactive Atlas Viewer

• Zoom from 10% to 1600% with smooth scaling
• Free panning across the entire atlas
• Transparency checkerboard background
• Sprite inspector — hover over any frame to see its name, size, and position

📦 Export to Your Engine

• JSON Array — Phaser 3 / PixiJS compatible (TexturePacker format)
• JSON Hash — TexturePacker Hash format
• Godot 4 — Native .tres AtlasTexture resources, ready to import
• Unity JSON — Unity-compatible sprite sheet data
• CSS Spritesheet — Background-position classes for web projects

🌐 Bilingual Interface

• Full English and Spanish support
• Instant language switching with persistent selection

❓ Contextual Help System

• Every panel has a built-in help button with step-by-step guides and pro tips
• Learn the tool as you use it — no need to leave the app

🚀 How It Works

1. Drop your sprites — Drag & drop PNG/image files into the app (or use the file browser)
2. Configure — Set padding, enable trimming, choose POT/square, adjust extrusion
3. Pack — Hit the pack button and watch the MaxRects algorithm arrange your sprites in milliseconds
4. Preview — Inspect the atlas with zoom/pan, or switch to the animation viewer for real-time playback
5. Export — Choose your target format and export the atlas + metadata in one click

🖥️ System Requirements

• OS: Windows 10/11 (64-bit)
• RAM: 4 GB minimum
• Disk: ~50 MB installed