Complete Guide to ConvertMastery
Learn everything you need to know about converting and compressing images with our powerful, free tool.
How It Works
Convert and compress your images in just a few simple steps
Select Input Format
Choose the format of your source images. We support HEIC (from iPhones), JPG, PNG, and WebP formats.
Upload Your Images
Drag and drop your images or click to browse. You can upload multiple images at once. Each image will show a preview with its size and dimensions.
Choose Output Format
Select your desired output format and quality setting. For conversion, choose between High-Res or Balanced quality. For compression, select percentage, ratio, or pixel dimensions.
Convert & Download
Click the convert/compress button and watch your images process in real-time. Once complete, download all processed images as a convenient ZIP file with a single click.
For Image Conversion
Supported Conversions:
- HEIC → JPG (High-Res or Balanced) or WebP (High-Res or Balanced)
- JPG → WebP (High-Res or Balanced) or PNG (Lossless)
- PNG → JPG (High-Res or Balanced) or WebP (High-Res or Balanced)
- WebP → JPG (High-Res or Balanced) or PNG (Lossless)
Quality Settings:
- High-Res: Best quality (95% for JPG, 90% for WebP) - Larger file size
- Balanced: Good quality (80% for both) - Optimal balance
- Lossless: PNG format - No quality loss, larger files
For Image Compression
Compression Methods:
- Percentage: Resize by percentage (1-100%) - Maintains aspect ratio
- Ratio: Resize by ratio (0.1 to 1.0) - Proportional scaling
- Pixel Dimensions: Set specific width and height in pixels
Features:
- See estimated file size before compression
- View original and compressed sizes side-by-side
- Maintains original image format
- Batch process multiple images
Why Use ConvertMastery?
Everything you need to convert and compress images efficiently
Lightning Fast
Convert or compress multiple images simultaneously with our optimized processing engine. No waiting in queues - your images are processed instantly.
- Batch processing for multiple files
- Real-time progress tracking
- Optimized algorithms for speed
100% Secure
Your privacy and security are our top priorities. All processing happens locally in your browser - your files never leave your device.
- No file uploads to servers
- No data storage or tracking
- Complete privacy protection
Multiple Formats
Support for all major image formats with flexible conversion options and quality settings. Perfect for any use case.
- HEIC, JPG, PNG, WebP support
- Customizable quality settings
- Flexible compression options
Free Forever
ConvertMastery is completely free to use with no hidden costs, registration requirements, or usage limits. Convert and compress as many images as you need, whenever you need.
No Installation Required
Works entirely in your web browser - no software downloads, no installations, no updates. Just open the website and start converting or compressing your images immediately.