Free Image Format Converter

Convert PNG, JPG, JPEG, HEIF to modern WebP and AVIF formats. Reduce file sizes by up to 70% while maintaining quality. All processing happens in your browser—your images never leave your device.

🔒100% Private & Secure
⚡Instant Conversion
🎯Quality Control
📱Resolution Options

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Why Image Format Matters

The right image format can dramatically improve your website's performance, SEO, and user experience

50%

Faster Load Times

WebP images load significantly faster than traditional formats

30%

Smaller File Size

AVIF reduces file sizes by up to 30% compared to WebP

2.5x

Better Compression

Modern formats offer superior compression vs JPEG

100%

Browser-Based

Your images never leave your device—complete privacy

Image Format Comparison

Understand the pros and cons of each format to make informed decisions

AVIF

Advantages

  • Best compression available (smallest file sizes)
  • Superior quality at lower bitrates
  • Supports HDR and wide color gamut
  • Both lossy and lossless compression

Limitations

  • Limited browser support (90%+ modern browsers)
  • Slower encoding/decoding than WebP
  • Not supported in older browsers

Best For

Modern web applications prioritizing performance and quality. Ideal for hero images, photography, and high-quality visuals.

WebP

Advantages

  • Excellent compression (25-35% smaller than JPEG)
  • Widely supported across all modern browsers
  • Supports transparency (alpha channel)
  • Fast encoding and decoding
  • Both lossy and lossless compression

Limitations

  • Not supported in older browsers (IE, old Safari)
  • Slightly larger than AVIF

Best For

Primary format for modern web development. Best balance of compression, quality, and browser support. Perfect for most use cases.

JPEG

Advantages

  • Universal browser support
  • Efficient for photographs
  • Small file size for photos
  • Widely accepted standard

Limitations

  • No transparency support
  • Lossy compression only
  • Larger than WebP/AVIF (20-30%)
  • Quality degradation with compression

Best For

Fallback format for older browsers. Use when maximum compatibility is required or for legacy systems.

PNG

Advantages

  • Lossless compression
  • Supports transparency
  • Universal browser support
  • Perfect for graphics, logos, icons

Limitations

  • Much larger file sizes
  • Inefficient for photographs
  • 2-5x larger than modern formats

Best For

Graphics with transparency where quality cannot be compromised. Logos, icons, screenshots with text.

When to Use Each Format

Practical scenarios and recommendations for different use cases

Hero Images & Banners

AVIF with WebP fallback

Large, high-quality images benefit most from AVIF's superior compression. Use WebP as fallback for older browsers.

Example: Homepage hero: 2.4MB JPEG → 680KB AVIF (72% reduction)

Product Photography

WebP (Quality: 85%)

Excellent balance of quality and file size. Wide browser support crucial for e-commerce.

Example: Product image: 1.8MB JPEG → 520KB WebP (71% reduction)

Thumbnails & Grid Images

WebP (Quality: 75-80%)

Lower quality acceptable at smaller sizes. Prioritize loading speed.

Example: Thumbnail grid: 450KB JPEG → 110KB WebP (76% reduction)

Logos & Icons

PNG or SVG

Transparency required. SVG preferred for scalability. PNG for complex graphics.

Example: Logo: 85KB PNG → Keep as PNG or convert to SVG

Screenshots & UI

PNG for quality, WebP for web

Text must remain sharp. PNG for documentation, WebP with high quality for web display.

Example: Screenshot: 1.2MB PNG → 380KB WebP (68% reduction)

Background Images

WebP (Quality: 70-75%)

Background images can tolerate more compression. Prioritize file size.

Example: Background: 3.1MB JPEG → 780KB WebP (75% reduction)

How Our Image Converter Works

Simple, fast, and completely secure—three steps to optimized images

1. Upload Your Image

Drag and drop or click to select your image. Supports PNG, JPG, JPEG, WebP, AVIF, and HEIF formats. All processing happens in your browser—no uploads to servers.

2. Choose Settings

Select your desired output format (WebP or AVIF recommended), adjust quality slider (85-90% for most use cases), and optionally resize to common resolutions.

3. Convert & Download

Click convert and watch your image transform. Preview the result, see file size reduction, and download instantly. Try different settings to find the perfect balance.

Image Optimization Best Practices

Professional techniques for maximum performance and quality

Use Progressive Enhancement

Serve modern formats (AVIF, WebP) with JPEG/PNG fallbacks using <picture> element.

<picture>
  <source srcset="image.avif" type="image/avif">
  <source srcset="image.webp" type="image/webp">
  <img src="image.jpg" alt="Description">
</picture>

Optimize Quality Settings

Start with 85% quality for photos, 90% for graphics. Adjust based on visual inspection.

💡 Pro Tip: Quality above 95% offers minimal visual improvement but significantly increases file size.

Responsive Images

Serve appropriately sized images for different devices. Don't send 4K images to mobile.

💡 Pro Tip: Use 1080p for desktop, 720p for tablets, 480p for mobile as starting points.

Lazy Load Below the Fold

Only load images when they're about to enter the viewport to improve initial page load.

<img src="image.webp" loading="lazy" alt="Description">

Optimize for Core Web Vitals

Image optimization directly impacts LCP (Largest Contentful Paint) and CLS (Cumulative Layout Shift).

💡 Pro Tip: Always specify width and height attributes to prevent layout shifts.

Test on Real Devices

What looks good on desktop might be over-compressed on mobile. Test across devices.

💡 Pro Tip: Use Chrome DevTools Network throttling to simulate slower connections.

Common Image Optimization Mistakes

Learn from these frequent errors to avoid performance pitfalls

Over-Compressing Images

Setting quality too low (below 70%) often results in visible artifacts, especially in photos with gradients or fine details. Solution: Start with 85% quality and only reduce if file size is still too large. Always visually inspect results.

Not Using Fallbacks

Serving only modern formats without fallbacks breaks images in older browsers (Safari < 14, IE). Solution: Always provide JPEG/PNG fallbacks using the <picture> element or server-side detection.

Ignoring Image Dimensions

Sending full-resolution images to mobile devices wastes bandwidth and slows load times. Solution: Create multiple versions at different resolutions and serve appropriately sized images.

Converting Logos to Lossy Formats

Logos and graphics with text should stay in lossless formats to maintain sharp edges. Solution: Keep logos as PNG or SVG. Only convert photographic content to lossy formats.

Forgetting Alt Text

Even with perfect compression, images without alt text hurt accessibility and SEO. Solution: Always include descriptive alt text that explains the image content and context.

Not Optimizing Before Upload

Uploading massive files to CMS/hosting then relying on automatic optimization is inefficient. Solution: Optimize images before upload. Use tools like this one to control quality and dimensions.

Why Image Optimization Matters for Your Business

The real-world impact on SEO, performance, and conversions

SEO Impact

  • Page speed is a direct ranking factor for Google
  • Better Core Web Vitals scores improve search visibility
  • Faster sites have lower bounce rates (better engagement signals)
  • Mobile performance increasingly important for rankings

Performance Benefits

  • Reduced bandwidth costs (30-70% less data transfer)
  • Faster page load times improve user experience
  • Less strain on hosting infrastructure
  • Better performance on slow connections

Business Impact

  • 1 second delay = 7% reduction in conversions
  • Amazon: 100ms faster = 1% revenue increase
  • 53% of mobile users abandon slow sites
  • Fast sites build trust and credibility
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