Image Format Conversion — When, Why, and How to Convert

Common Format Conversions

PNG to JPG

• When: Sharing photos, reducing file size, uploading to forms
• Why: JPG files are 3-10x smaller for photographs
• Note: Transparency is replaced with white background

JPG to PNG

• When: You need lossless quality or transparency support
• Why: No further quality loss from re-saving
• Note: File size will increase significantly for photos

Any Format to WebP

• When: Optimizing images for websites
• Why: 25-34% smaller than JPG with same quality
• Note: Check browser support for your audience

SVG to PNG

• When: Using vector graphics in contexts that need raster images
• Why: Some platforms and tools only accept raster formats
• Note: Choose an appropriate resolution since SVGs are infinitely scalable

HEIC to JPG

• When: Sharing iPhone photos with non-Apple devices
• Why: HEIC is not universally supported
• Note: Slight quality loss during conversion

How Browser-Based Conversion Works

Browser-based image converters use the HTML5 Canvas API:

1. The source image is loaded into memory
2. It is drawn onto an invisible canvas element
3. The canvas exports the image in the target format
4. You download the converted file

This entire process happens locally — your images never leave your device.