🎯 What You'll Learn
- When to use supported input formats: PNG, JPEG/JPG/JPE/JFIF, WebP, GIF, BMP, ICO, AVIF, QOI, SVG (plus TIFF output)
- Compression techniques for web optimization
- Quality settings for different use cases
- File size optimization strategies
- Browser and device compatibility considerations
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Professional Image Processing & Design Books
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🖼️ Format Comparison
| Format | Best For | Compression | Transparency | File Size |
|---|---|---|---|---|
| JPEG/JPG/JPE/JFIF | Photos, complex images | Lossy (adjustable) | ❌ No | Small |
| PNG | Graphics, logos, text | Lossless | ✅ Yes | Large |
| WebP | Web optimization | Both lossy & lossless | ✅ Yes | Very Small |
| GIF | Animations, simple graphics | Lossless (limited colors) | ✅ Yes | Medium |
| BMP | Windows applications | None (uncompressed) | ❌ No | Very Large |
| TIFF (Output Only) | Print, professional photography | Lossless or lossy | ✅ Yes | Large |
| ICO | Windows icons, favicons | Various | ✅ Yes | Small |
| AVIF | Next-gen web images | ✅ Yes | Smallest | |
| SVG | Vector graphics, icons | Text-based | ✅ Yes | Tiny |
| QOI | Fast lossless images | Lossless | ✅ Yes | Small (similar to PNG) |
🎯 When to Use Each Format
📸 JPEG (JPG/JPE/JFIF) - Best for Photos
- Use for: Photographs, complex images with many colors
- Quality: 80-90% for web, 95%+ for print
- File size: Excellent compression for photos
- Avoid for: Text, logos, images with transparency
🎨 PNG - Best for Graphics
- Use for: Logos, text images, graphics with transparency
- Quality: Perfect (lossless compression)
- File size: Larger than JPEG for photos
- Perfect for: Screenshots, diagrams, simple graphics
🚀 WebP - Best for Web
- Use for: Modern websites, web applications
- Support: 95%+ browser compatibility (2025)
🎬 GIF - Best for Simple Animations
- Use for: Simple animations, graphics with few colors
- Quality: Limited to 256 colors
- File size: Good for simple graphics, large for photos
- Perfect for: Icons, simple animations, memes
💡 Real Use Case:
Convert a product screenshot (PNG) to GIF for email marketing. Many email clients block modern formats like WebP/AVIF, but GIF has universal support dating back to the 1990s. Perfect for simple graphics, logos, or step-by-step tutorials that need to work in every email client.
Convert a product screenshot (PNG) to GIF for email marketing. Many email clients block modern formats like WebP/AVIF, but GIF has universal support dating back to the 1990s. Perfect for simple graphics, logos, or step-by-step tutorials that need to work in every email client.
🖥️ BMP - Windows Standard
- Use for: Windows applications, legacy systems
- Quality: Perfect (uncompressed)
- File size: Very large (no compression)
- Avoid for: Web use, mobile apps
📷 TIFF - Professional Photography (Output Only)
- Use for: Print media, professional photography
- Quality: Excellent (lossless or minimal loss)
- File size: Large but manageable
- Perfect for: Archival, high-quality prints
- ⚠️ Note: You can convert TO TIFF, but not FROM TIFF (browsers cannot read TIFF input)
🎯 ICO - Windows Icons
- Use for: Windows icons, favicons
- Quality: Good for small sizes
- File size: Small (optimized for icons)
- Perfect for: Website favicons, app icons
🎨 SVG - Vector Graphics
- Use for: Logos, icons, simple graphics
- Quality: Infinite scalability
- File size: Tiny for simple graphics
- Perfect for: Responsive design, retina displays
💡 Pro Tip: Use AVIF or WebP for modern web, PNG for graphics with transparency, and JPEG (JPG/JPE/JFIF) for photos.
📝 Image Scaling in Our Converter: When converting images, you can resize them using scale percentage (10-500%):
- 10-50%: Create thumbnails and optimize for web (excellent quality retention)
- 50-100%: Reduce file size while maintaining quality
- 100-200%: Slight enlargement for print purposes (acceptable quality)
- 200-500%: Major upscaling (expect visible quality loss and pixelation)
⚠️ Important: Downscaling (reducing size) produces much better results than upscaling. For precise control, use the width/height pixel inputs instead of percentage.
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🆕 Modern Formats You Should Know
WebP - Google's Web Optimizer
The current web standard for optimized images:
- Adoption: Supported by 95%+ of browsers
- Versatility: Both lossy and lossless compression
- Features: Transparency, animation support
- Performance: 25-35% smaller than PNG/JPEG
📝 Common Conversion Scenarios
🌐 Web Developers
- PNG → WebP: Reduce file sizes by 25-50%
- Any → ICO: Create favicons from any image
- SVG → PNG: Rasterize vector graphics for compatibility
- PNG → GIF: Email marketing compatibility (works in all clients)
🖨️ Print & Professional
- Any → TIFF: High-quality print preparation
- JPEG (JPG/JPE/JFIF) → PNG: Remove compression artifacts
- Lossless: No quality loss compared to PNG
- Very fast: Faster than PNG to encode/decode in browsers
- Use cases: Assets for tools, lossless archiving with quick viewing, developer workflows
- Browser support: Browsers don’t preview QOI natively; download and open with a QOI-capable viewer
- Any → BMP: Windows application compatibility
🟥 QOI (Quite OK Image) - Simple, Fast Lossless
QOI is a modern lossless image format designed for speed and simplicity. It compresses images efficiently with extremely fast decoding/encoding speeds.
🎨 Creative & Design
- SVG → PNG: Rasterize vector graphics for compatibility
- Any → GIF: Create simple animations or web graphics
📱 Mobile & Web Optimization
Responsive Images Strategy:
- Create multiple sizes - Thumbnail, medium, large
- Use WebP when possible - Fallback to JPEG/PNG
- Optimize for retina - 2x resolution for high-DPI screens
- Lazy loading - Load images as users scroll
File Size Guidelines:
- Thumbnails: Under 10KB
- Social media: 50-100KB
- Full-size photos: 200-500KB
- Print quality: 1-5MB (300+ DPI)
⚠️ Avoid These Mistakes:
- Using PNG for photos - Results in huge file sizes
- Over-compressing JPEG - Creates ugly artifacts
- Ignoring WebP - Missing 30%+ file size savings
- Wrong dimensions - Scaling images in HTML/CSS
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