How to Compress Images Without Losing Quality
Image compression is one of the most impactful optimizations you can make for any website. A typical unoptimized image can be 5-10x larger than necessary, directly hurting your Core Web Vitals and user experience.
Understanding Compression Types
Lossy Compression
Formats like JPEG and WebP use lossy compression. They discard visual information that the human eye is less sensitive to. The key is finding the quality sweet spot — usually 75-85% for photographs.
Lossless Compression
PNG and lossless WebP preserve every pixel. Best for graphics with sharp edges, text, or when you need pixel-perfect reproduction.
The 80% Rule
In our testing across 10,000 images:
- Converting JPEG → WebP at quality 80: ~35% smaller
- Converting PNG → WebP lossless: ~25% smaller
- Properly optimized JPEG at quality 75 vs unoptimized: ~60% smaller
Browser-Side Processing
Unlike cloud services, AmberPic processes everything in your browser. This means:
- Zero upload time — files never leave your device
- Instant results — no server round-trip
- Unlimited files — no API quotas or queues
Practical Tips
- Use WebP for photos — universally supported since 2020
- Keep PNG for transparency — or use WebP with alpha
- Resize before compressing — don’t compress a 4000px image for a 800px slot
- Batch process — use our bulk tools for entire folders
Try our Image Compressor — free, private, instant.