Free Online Image Format Converter

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This tool integrates image format conversion, batch processing, online watermark addition and other practical functions. No need to download and install any software, use directly in the browser, making image processing simple and fast. Whether you are a designer, photographer or ordinary user, you can find tools to meet your needs here.

Drag images here or click to select

Supports JPG, PNG, GIF, WEBP, BMP formats

📚 Image Format Knowledge Guide

Understand the characteristics of different image formats and choose the format that best suits your needs

JPEG

Lossy Compression

Most commonly used image format, suitable for photos and complex images

  • ✅ Small file size, high compression efficiency
  • ✅ Supports millions of colors
  • ✅ Excellent compatibility, supported by all devices
  • ❌ No transparent background support
  • ❌ Lossy compression, quality degrades with multiple edits
Use Cases: Photo sharing, web images, social media

PNG

Lossless Compression

High-quality image format with transparent background support

  • ✅ Lossless compression, maintains original quality
  • ✅ Supports transparent and semi-transparent effects
  • ✅ Ideal for icons, logos and simple graphics
  • ❌ Larger file size
  • ❌ Not suitable for complex photos
Use Cases: Website icons, logo design, images requiring transparency

WEBP

Modern Format

Modern image format developed by Google, balancing quality and size

  • ✅ 25-35% smaller than JPEG with same quality
  • ✅ Supports both lossy and lossless compression
  • ✅ Supports transparency and animation
  • ❌ Not supported by some older browsers
  • ❌ Limited editing software support
Use Cases: Modern websites, mobile apps, web optimization

BMP

Uncompressed

Windows native format, uncompressed bitmap file

  • ✅ Lossless quality, completely faithful
  • ✅ Simple structure, good compatibility
  • ✅ Supports multiple color depths
  • ❌ Extremely large file size
  • ❌ No transparent background support
Use Cases: Image processing intermediate format, system icons, special purposes

GIF

Animation Support

Image format with animation support, preferred for web memes

  • ✅ Supports animation effects
  • ✅ Supports transparent background
  • ✅ Excellent compatibility
  • ❌ Only supports 256 colors
  • ❌ Not suitable for photos and complex images
Use Cases: Animated memes, simple animations, web decorations

📊 Format Comparison Table

Format Compression Type Transparency Animation Support File Size Browser Support Use Cases
JPEG Lossy ❌ ❌ Small 100% Photos, complex images
PNG Lossless ✅ ❌ Large 100% Icons, logos
WEBP Lossy/Lossless ✅ ✅ Very Small 95%+ Modern websites
BMP Uncompressed ❌ ❌ Extremely Large 100% Professional use
GIF Lossless ✅ ✅ Medium 100% Animations, memes

💡 Selection Recommendations

📱 Social Media Sharing

Recommended to use JPEG format, small file size, fast loading, meets most platform requirements

🎨 Design Portfolio

Recommended to use PNG format, maintains best quality, supports transparent background

🌐 Website Optimization

Recommended to use WEBP format, significantly reduces file size while ensuring quality

😄 Creating Memes

Recommended to use GIF format, supports animation effects, good compatibility

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