Image Compression Calculator
Find the perfect balance between file size and visual quality
Quality Disclaimer: Excessive compression may cause irreversible quality loss. Always keep originals of important images.
Tip: For websites, aim for under 500KB per image. Critical above-the-fold images should load fastest.
Compression Settings
Optimization Presets
Compression Results
Estimated File Size:
Savings:
Quality Level:
Best Used For:
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Visual Quality Prediction:
Good quality with minor artifacts
Recommendations:
- Consider WebP for 25% smaller files at this quality
- Reduce dimensions to 1280×720 for web use
Image Compression: Key Strategies
Format Selection
- JPEG: Best for photographs (lossy compression)
- PNG: Ideal for graphics with transparency
- WebP: Superior web format (30% smaller than JPEG)
- AVIF: Next-gen format for high compression
Quality vs Size
- 85-100%: Virtually lossless (large files)
- 70-85%: Excellent quality (good savings)
- 50-70%: Noticeable artifacts (small files)
- Below 50%: Significant quality loss
"Proper image compression can improve page load times by 50% or more. Our calculator helps you find the sweet spot between quality and performance."
Resolution Guidelines by Medium
Web & Social Media
For websites, 72 DPI is standard. Recommended dimensions: 1200-2000px wide for full-width images, 800-1200px for content images. Facebook cover photos: 820×312px, Instagram posts: 1080×1080px.
Print Media
Print requires 300 DPI minimum. A 4×6" photo needs 1200×1800 pixels. For an 8×10" print: 2400×3000px. Always check with your printer for specific requirements.
Email Marketing
Keep images under 600px wide and 100KB each. Many email clients block images over 1MB. Use JPEG at 60-70% quality for photos, PNG-8 for graphics.
Pro Tip: Always compress images after resizing - compressing before resizing wastes processing on pixels that will be discarded.
Frequently Asked Questions
What's the difference between lossy and lossless compression?
Lossy compression (JPEG, WebP) permanently removes data to reduce file size, while lossless (PNG, GIF) preserves all image data. Lossy is better for photos, lossless for graphics.
How much can I safely compress an image?
It depends on usage. For web: 60-80% quality is generally safe. For print: never below 90%. Always check compressed images on the actual display medium.
Why does my PNG file stay large even at low quality?
PNG uses lossless compression - quality settings only affect compression effort, not actual quality. For photos, use JPEG or WebP instead.
When should I use WebP vs AVIF?
WebP has broader browser support (95% coverage). AVIF offers better compression but works only in modern browsers (Chrome, Firefox, Edge). Check your audience's browsers.
How does DPI affect file size?
DPI (dots per inch) only matters for print - it doesn't affect digital display or file size. What matters is the total pixel dimensions (width × height in pixels).