Free Image Converter: Change Image Format Online (PNG, JPG, WebP, GIF)

Different platforms and use cases require different image formats. PNG for transparency, JPG for photos, WebP for the web, and SVG for vectors. An image converter lets you switch between formats without opening a desktop editor.

Image Format Comparison

• PNG - lossless, supports transparency. Best for logos, icons, screenshots, and graphics with text. Larger file sizes than JPG.
• JPG/JPEG - lossy compression, no transparency. Best for photographs and complex images. Smallest file sizes for photos.
• WebP - modern format with both lossy and lossless modes. 25-35% smaller than JPG at equivalent quality. Growing browser support.
• GIF - limited to 256 colors, supports animation. Best for simple animations and low-color graphics.
• BMP - uncompressed, no quality loss. Very large files. Rarely used on the web.
• ICO - favicon format. Multi-resolution container for icons at 16x16, 32x32, 48x48, etc.

When to Convert Image Formats

• Web optimization - convert PNG photos to WebP to reduce page load time
• Email attachments - convert large PNG screenshots to JPG to reduce file size
• Favicon creation - convert PNG to ICO for website favicons (or use Favicon Generator)
• App requirements - some platforms only accept specific formats (App Store requires PNG, some APIs require JPG)
• Transparency needs - convert JPG to PNG when you need a transparent background

How to Convert Images

Using the SnapSum Image Converter:

• Upload your image (PNG, JPG, WebP, GIF, BMP, or ICO)
• Select the target format
• Adjust quality settings for lossy formats (JPG, WebP)
• Download the converted file

Conversion Quality Tips

• JPG to PNG - quality is preserved (PNG is lossless)
• PNG to JPG - transparency is replaced with a white background. JPG does not support alpha channels.
• Any to WebP - use 80-85% quality for a good balance of size and quality
• Multiple conversions - avoid converting back and forth between lossy formats. Each JPG save loses quality.

Frequently Asked Questions

Is WebP supported everywhere?

WebP is supported by all major browsers (Chrome, Firefox, Edge, Safari 14+). For older browsers, provide a JPG or PNG fallback using the picture element.

Can I batch convert multiple images?

Currently the SnapSum converter processes one image at a time. For batch conversion, consider command-line tools like ImageMagick or ffmpeg.