How Pixymini Works
Understanding the technology behind privacy-first image compression
The Problem with Traditional Tools
Most online image compression tools require you to upload your images to their servers. This means:
- Your images are stored on someone else's servers
- Your images may be analyzed for various purposes
- Embedded metadata (GPS, timestamps, device info) could be extracted
- You're dependent on their internet connection and server availability
Our Solution: Browser-Based Processing
Pixymini processes everything directly in your browser using modern web technologies. Your images never leave your device.
How Compression Works
Select Your Images
Drag and drop your images or click to browse. We support JPEG, PNG, WebP, AVIF, and GIF formats. Your images are loaded directly into your browser's memory- they're never uploaded to any server.
Choose Your Settings
Select from two modes:
Magic Mode
Automatic optimization with smart defaults for each format
Advanced Mode
Full control over quality, format, and compression settings
Process Locally
Choose your processing mode:
Client-Side (Default)
Images are compressed in your browser using Web Workers. Maximum privacy- no data leaves your device.
Server-Side
Optional server processing using Sharp for advanced features. Images are processed and immediately discarded.
Download Your Images
Download individual images or all at once as a ZIP file. Compare before and after with our interactive slider. See exactly how much space you saved.
Technology Stack
WWebAssembly
Near-native performance for image processing directly in the browser
WWWeb Workers
Parallel processing to keep the UI responsive during compression
CCanvas API
Fallback processing when WebAssembly isn't available
SSharp
High-performance Node.js image processor for server-side mode
Supported Formats
| Format | Best For | Transparency | Typical Savings |
|---|---|---|---|
| JPEG | Photos | 40-70% | |
| PNG | Graphics | 20-40% | |
| WebP | Web | 50-80% | |
| AVIF | Modern Web | 60-90% | |
| GIF | Animations | Limited | Converted to WebP |
Pro Tips
- •Use Magic Mode for quick results with optimal quality-to-size ratio
- •Convert PNG to WebP when transparency is needed for smaller file sizes
- •Use AVIF for maximum compression on modern websites
- •Enable lossless mode for WebP/AVIF when perfect quality is required