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Image Format Converter

Convert images between PNG, JPEG, and WebP formats. Choose the optimal format for your use case to improve web performance.

💡 Format Comparison

  • <strong>PNG:</strong> Lossless quality, supports transparency, larger file size
  • <strong>JPEG:</strong> Lossy compression, no transparency, smaller file size, best for photos
  • <strong>WebP:</strong> Modern format, better compression than JPEG, supports transparency
  • <strong>Privacy:</strong> All processing happens in your browser - no uploads to server

🎯 When to Use Each Format

PNG
Perfect for logos, icons, screenshots, and images with text or transparency
JPEG
Best for photographs and images with many colors where small quality loss is acceptable
WebP
Modern web format with superior compression, ideal for websites and web applications

Key Features​

  • Convert freely between PNG, JPEG, WebP
  • Quality adjustment (JPEG, WebP)
  • File size comparison
  • Before/after preview
  • Client-side processing (no server upload)

Supported Formats​

PNG (Portable Network Graphics)​

  • Pros: Lossless compression, transparency support, sharp quality
  • Cons: Large file size
  • Use: Logos, icons, screenshots, transparent backgrounds

JPEG (Joint Photographic Experts Group)​

  • Pros: Small file size, optimized for photos
  • Cons: Lossy compression, no transparency
  • Use: Photos, background images, photography

WebP​

  • Pros: Excellent compression, transparency support, modern
  • Cons: Not supported by some older browsers
  • Use: Websites, mobile apps, modern web services

Use Cases​

1. Web Performance Optimization​

PNG (5.2MB) → WebP (1.1MB)
78% size reduction, improved loading speed

2. Reducing Photo File Size​

PNG (8.5MB) → JPEG (1.8MB)
79% size reduction, email attachment ready

3. Maintaining Transparency​

PNG (3.2MB) → WebP (850KB)
73% size reduction while maintaining transparency

Format Selection Guide​

Choose PNG When​

  • ✅ Logos or icons (sharp lines)
  • ✅ Transparent background needed
  • ✅ Images with text
  • ✅ Screenshots
  • ✅ Graphic design

Choose JPEG When​

  • ✅ Photos (many colors)
  • ✅ File size is critical
  • ✅ No transparency needed
  • ✅ Need older browser support
  • ✅ Social media uploads

Choose WebP When​

  • ✅ Modern websites
  • ✅ Need best compression
  • ✅ Need both transparency and small size
  • ✅ Mobile optimization
  • ✅ Using Google recommended format

Quality Settings​

JPEG Quality​

  • 90-100%: Nearly lossless, large file size
  • 80-90%: Optimal (recommended), virtually no visible difference
  • 70-80%: Slight quality loss, smaller file
  • 60-70%: Noticeable quality degradation
  • Below 60%: Not recommended

WebP Quality​

  • 90-100%: Highest quality, still smaller than JPEG
  • 80-90%: Optimal (recommended), excellent compression
  • 70-80%: Good balance
  • 60-70%: Small file, some quality loss

File Size Comparison​

Same Image (4000×3000 photo)​

PNG:    12.5 MB (100% quality, lossless)
JPEG:    2.1 MB (90% quality)
JPEG:    1.4 MB (80% quality)
WebP:    1.5 MB (90% quality)
WebP:    950 KB (80% quality)

Transparent Background Image (1000×1000)​

PNG:     850 KB (lossless)
WebP:    180 KB (90% quality, maintains transparency)
JPEG:   Not possible (no transparency support)

Browser Support​

PNG​

  • ✅ All browsers

JPEG​

  • ✅ All browsers

WebP​

  • ✅ Chrome 32+
  • ✅ Firefox 65+
  • ✅ Edge 18+
  • ✅ Safari 14+
  • ✅ Opera 19+

Technical Details​

Conversion Method​

  • Canvas API: HTML5 Canvas image rendering
  • Blob Generation: Browser native encoder
  • Quality Control: toBlob() method quality parameter

Transparency Handling​

  • PNG → JPEG: Replaced with white background (no transparency support)
  • PNG → WebP: Maintains transparency
  • JPEG → PNG: No transparency (not in original)

Privacy​

  • ✅ All processing happens in your browser
  • ✅ Images are not uploaded to any server
  • ✅ 100% client-side processing

FAQ​

Q: Is WebP always smaller?​

A: In most cases, WebP is 30-50% smaller than JPEG. However, it may vary by image type.

Q: What happens to transparent backgrounds when converting PNG to JPEG?​

A: Transparent backgrounds are replaced with white. JPEG doesn't support transparency.

Q: Which format is best?​

A: Depends on use:

  • Photos → WebP (modern browsers) or JPEG
  • Logos/Icons → PNG or WebP
  • Transparent background → PNG or WebP

Q: What quality setting should I use?​

A: 80-90% is optimal for JPEG/WebP. Minimal visible difference while significantly reducing file size.

Q: What about browsers that don't support WebP?​

A: Safari below 14, IE, and other older browsers don't support it. Use JPEG or PNG for these cases.

Optimization Tips​

Website Images​

1. Convert original PNG/JPEG → WebP (80-90% quality)
2. Prepare JPEG fallback for older browsers
3. Use <picture> tag with WebP priority, JPEG fallback

Email Attachments​

1. Convert PNG → JPEG (80-85% quality)
2. Combine with image resizer for size adjustment
3. Keep total size under 5MB

Social Media​

1. Use WebP or JPEG (check platform recommendations)
2. Set quality to 85-90%
3. Resize to each platform's recommended dimensions

Advanced Usage​

Preparing Multiple Formats​

1. Upload original PNG
2. Convert to WebP (80%) → Download
3. Re-upload → Convert to JPEG (85%) → Download
4. All formats ready

Finding Optimal Quality​

1. Convert at 90% quality → Check file size
2. Convert at 80% quality → Compare quality
3. Convert at 70% quality → Check minimum acceptable quality
4. Select quality for your use case

Performance Comparison​

FormatQualityCompressionTransparencyBrowser Support
PNG⭐⭐⭐⭐⭐⭐⭐✅⭐⭐⭐⭐⭐
JPEG⭐⭐⭐⭐⭐⭐⭐⭐❌⭐⭐⭐⭐⭐
WebP⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐✅⭐⭐⭐⭐