Image Format Converter & Compression Estimator
Estimate file sizes and bandwidth savings converting between PNG, JPEG, WebP, and AVIF.
Privacy First: 100% Client-Side Processing
Processed in your browser. Files are never uploaded.
How to Use the Image Converter: WebP, AVIF & Compression Estimator
- 1Enter the image width and height in pixels.
- 2Select your current source image format (PNG, JPEG, or WebP).
- 3Select your desired destination format (WebP, AVIF, or JPEG) and quality level.
- 4Review estimated file size savings, megapixels, and speed improvement percentages.
Formula & How It Works
Next-Gen Image Compression Model
Calculates entropy reduction based on WebP and AVIF lossy/lossless algorithms.
Worked Examples
Converting a 1920x1080 PNG to WebP
Input: 1920x1080, Source: PNG, Target: WebP (Quality 80%)
Explanation: WebP predictive encoding cuts file size by over 75% with visually lossless fidelity.
Frequently Asked Questions
Is WebP better than JPEG for websites?▼
Yes, WebP provides 25% to 35% smaller file sizes than JPEG at identical visual quality, and supports alpha transparency.
What is the difference between WebP and AVIF?▼
AVIF is based on the AV1 video codec and achieves even higher compression than WebP, especially for high-detail photos.
What quality setting is recommended for web photos?▼
A quality setting between 75% and 82% offers the optimal sweet spot between bandwidth savings and crystal-clear visual quality.
How does image compression affect Google rankings?▼
Faster loading images improve Core Web Vitals (LCP), directly boosting mobile SEO search rankings and reducing bounce rates.
Quick Reference & Conversion Table
| Image Format | Compression Type | Typical Size Savings | Browser Support |
|---|---|---|---|
| WebP | Lossy & Lossless | 25% – 35% vs JPEG, 70% vs PNG | 97%+ Universal Support |
| AVIF | Next-Gen AV1 Lossy | 50% vs JPEG, 20% vs WebP | Modern Browsers (Chrome/Safari) |
| JPEG | Classic Lossy | Baseline | 100% Universal Legacy |
| PNG | Lossless Deflate | Large file size | 100% Universal (Transparency) |
⚠️ Common Pitfalls to Avoid
- •Saving photographic images as PNGs, which dramatically bloats file size compared to WebP.
- •Compressing below 60% quality, which introduces visible compression artifacts.
💡 Practical Real-World Uses
- •Optimizing blog hero graphics and e-commerce product photos for fast mobile page speed.
- •Passing Google PageSpeed Insights Largest Contentful Paint (LCP) performance audits.
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