Image Compression Comparison
Compare original vs compressed image file sizes side by side.
CMYK ↔ RGB ↔ HEX Color Converter
About Image Compression Comparison
The Multi-Codec Image Compression & Visual Quality Comparator runs simultaneous local client-side compression across WebP, AVIF, JPEG, and PNG formats, presenting side-by-side split comparison, byte savings (%), and PSNR/SSIM quality scores.
How to Use Image Compression Comparison
Step 1
Upload an image to compare.
Step 2
Adjust quality sliders for WebP, AVIF, and JPEG.
Step 3
Use the split-screen slider and zoom tool to compare visual fidelity.
Step 4
Click "Download Best (AVIF/WebP)".
Practical Use Cases for Image Compression Comparison
Finding the Optimal Image Format & Quality Level for Web Performance
Compare AVIF vs WebP vs JPEG at various quality settings (Q60, Q75, Q85) to achieve the smallest byte size with zero noticeable visual degradation.
Evaluating Web Vitals & Core Web Page Weight Reduction
Audit visual artifacting (blocking, banding, blurring) before deploying compressed images to production CDNs.
Input & Output Examples
Comparing 2.5MB PNG across WebP and AVIF
Source: `hero-banner.png` (2.5 MB)
AVIF Q70: `180 KB` (-92.8%) | WebP Q75: `320 KB` (-87.2%) | MozJPEG Q80: `460 KB` (-81.6%) | SSIM: `0.985` (Near Imperceptible)
Key Features & Performance
- ✓Simultaneous multi-format encoding: WebP, AVIF, JPEG (MozJPEG), and Lossless PNG.
- ✓Interactive 4-way split comparison slider and 200% zoom loupe to inspect micro-artifacts.
- ✓Metrics: Exact file size (KB/MB), compression ratio (%), and SSIM / PSNR visual quality index.
- ✓100% Client-Side WebAssembly codecs.
- ✓1-Click Download best compressed format.
Key Terminology & Definitions
SSIM (Structural Similarity Index)
A perceptual metric that quantifies image quality degradation caused by compression ($1.0$ = visually identical, $>0.95$ = excellent).
AVIF Format
An open, royalty-free image format derived from the AV1 video codec that provides superior compression efficiency compared to JPEG and WebP.