⚙️ Settings & Upload
📁 Files
🧪 Example Presets
Click a preset to apply optimal settings
💡 Image Optimization Best Practices
Optimizing images is crucial for web performance. Proper compression and format selection can reduce page load times by 50-70%, improve SEO rankings and enhance user experience on slow connections.
Format Selection Guide:
- WebP - Best for 96%+ of use cases. 25-35% smaller than JPEG with identical quality. Supports transparency. Recommended for all web images.
- AVIF - Newest format, 50% smaller than JPEG. 94% browser support (Chrome 85+, Firefox 93+, Safari 16+). Use as progressive enhancement with WebP fallback.
- JPEG - Universal compatibility. Use for email attachments or legacy browser support. Always provide WebP alternative for web.
- PNG - For logos, icons, graphics with text or images requiring transparency. Use WebP lossless for better compression.
Converting Legacy Formats:
- GIF → WebP - Convert old GIF images to WebP for 60-80% size reduction. WebP supports transparency like GIF.
- BMP → PNG/WebP - Convert uncompressed BMP files to PNG (lossless) or WebP for massive size savings (90%+).
- TIFF → JPG/WebP - Convert high-quality TIFF photos to WebP or JPEG for web use with quality 85-90.
Quality vs Size Recommendations:
- Quality 90-100 - Archival, print-ready or detail-critical images. Large files (500KB-2MB).
- Quality 85 - Optimal sweet spot. Visually identical to original, 60-70% size reduction. Recommended for hero images.
- Quality 80 - Excellent for most web images. 70-80% size reduction with imperceptible quality loss.
- Quality 70-75 - Maximum compression for acceptable quality. Good for thumbnails and non-critical images.
- Quality <70 - Visible artifacts. Only use for tiny thumbnails or decorative elements.
Resize Guidelines by Use Case:
- Hero/Banner - 1920px width (desktop) or 1200px (mobile-first). Most displays are 1920px or smaller.
- Content/Blog - 1200px width. Sufficient for article images, product photos, portfolio pieces.
- Thumbnails - 400-600px width. Grid previews, product listings, gallery thumbnails.
- Icons/Avatars - 64-128px. Profile pictures, small UI elements.
- Always enable aspect ratio lock - Prevents distortion. Resize by width only for consistency.
Performance Impact:
- Reducing image size from 2MB to 200KB saves 1.8MB per image
- On 3G connection, this saves 6+ seconds load time per image
- Google PageSpeed Insights penalizes unoptimized images
- Faster page loads improve conversion rates by 10-20%
- Optimized images reduce bandwidth costs and CDN fees
Batch Processing Tips:
- Process similar images together (all photos, all graphics, etc.)
- Use Apply to All for consistent settings across batches
- For 50+ images, process in groups of 20-30 to avoid memory issues
- Sort by use case (hero/content/thumbnails) before processing
- Test settings on 1-2 images before processing entire batch
📚 Understanding Image Formats
Image formats differ in compression methods, quality and browser support. Choosing the right format can reduce file sizes by 50-80% while maintaining visual quality, dramatically improving web performance and user experience.
Format Comparison:
- JPEG - Universal support, lossy compression, best for photos, 10-20% larger than WebP
- PNG - Lossless compression, transparency support, large file sizes, best for graphics with text
- WebP - 25-35% smaller than JPEG, supports transparency, 96% browser support (2025)
- AVIF - 50% smaller than JPEG, superior quality at low bitrates, 94% browser support (2025)
- GIF (input only) - Lossless LZW compression, 256 color limit, animation support. Convert to WebP for better compression.
- BMP (input only) - Uncompressed, huge file sizes. Convert to PNG (lossless) or WebP/JPEG (lossy) for web use.
- TIFF (input only) - Professional photography format. Convert to WebP or JPEG for web, keeping quality 85-90.
Browser Support (2025):
- WebP - Chrome 32+, Firefox 65+, Safari 14+, Edge 18+ (96% global support)
- AVIF - Chrome 85+, Firefox 93+, Safari 16+, Edge 85+ (94% global support)
- JPEG/PNG - Universal support (100% browsers)
When to Use Each Format:
- WebP - Default choice for web images, best balance of size and compatibility (96% support)
- AVIF - Modern browsers, maximum compression, future-proof with WebP fallback (94% support)
- JPEG - Fallback for older browsers, email attachments, universal compatibility
- PNG - Logos, graphics with text, images requiring transparency, pixel-perfect reproduction
❓ Frequently Asked Questions
Image compression reduces file size by removing redundant data. Lossy compression (JPG, WebP, AVIF) removes visual details imperceptible to humans, while lossless compression (PNG, WebP lossless) preserves all original data. Our tool processes images entirely in your browser using the Canvas API and modern codecs, ensuring your images never leave your device.
WebP offers better compression than JPG/PNG (25-35% smaller) with good browser support (95%+). AVIF is newer and provides even better compression (50% smaller than JPG) with superior quality at low bitrates, but has limited browser support (80%+). WebP is recommended for production use, while AVIF is ideal for modern browsers and future-proofing.
Quality 80-90 provides excellent visual quality with significant size reduction for most images. Quality 70-80 is good for web use with strong compression. Quality below 70 may show visible artifacts and is only recommended for thumbnails. For archival purposes, use quality 90-100 or lossless PNG/WebP. Test different settings and compare results before deciding.
Yes! Most displays are 1920px wide, so images wider than 2000px are unnecessarily large for web. Resize to 1920px width for hero images, 1200px for content images, 800px for thumbnails. This alone can reduce file size by 60-80% before compression. Always enable Maintain Aspect Ratio to prevent distortion.
Absolutely! All image processing happens locally in your browser using JavaScript and Canvas API. No images are uploaded to servers or transmitted over the network. You can use this tool completely offline once loaded. Your photos, screenshots and documents remain 100% private on your device.
Yes! Drag and drop multiple images or select several files at once. The tool processes images sequentially to avoid freezing your browser. You can download compressed images individually or use the Download All button to get all results. For very large batches (100+ images), consider processing in smaller groups.
Input formats: JPG/JPEG, PNG, WebP, AVIF, GIF, BMP and TIFF. You can convert any of these to output formats: JPG, PNG, WebP and AVIF (modern browsers only). The tool uses Canvas API which supports these four output formats natively. For example, you can convert GIF or BMP to WebP for better compression.
Use lossless compression for logos, graphics with text, screenshots with UI elements, diagrams and images requiring pixel-perfect reproduction. Lossless PNG or WebP preserves all original data but results in larger files. For photos and natural images, lossy compression (quality 80-90) provides better size reduction with imperceptible quality loss.