Serp Vip SQUOOSH GRADE
Blogger Image Optimizer & Bulk Converter
* 100% In-Browser · Zero Server Cost · No API Required

Squoosh-Grade Split Comparison & Bulk ZIP Optimizer

Inspect original vs. compressed image in real time, auto-tune to target KB sizes, and download batch files as a single .ZIP.

Single image or batch folders
Squoosh Split Viewer 1200 x 800px
100%
Original Uncompressed
Optimized Preview
Original: 91.8 KB
✓ Optimized: 13.2 KB -86%
Drag divider left / right to inspect quality
ORIGINAL SIZE 91.8 KB
OPTIMIZED SIZE 13.2 KB
TOTAL SAVED 85%
PSI TARGET Pass (<80KB)
Encoder Settings
WEBP
WebP is universally supported and matches Blogger CDN -rw.
Visual Quality 82%
10% (Smaller) 80-85% (Sweet spot) 100% (Crisp)
Width (px)
Height (px)
Drag & Drop Multiple Images Here
JPG, PNG, WebP, AVIF, BMP, GIF supported
No files uploaded yet.
LCP Target: < 2.5s
Largest Contentful Paint
Heavy hero images are the #1 cause of failing LCP on Blogger. Compress to < 80 KB and serve WebP.
CLS Target: < 0.1
Cumulative Layout Shift
Always specify width="800" height="450" explicitly so browsers reserve aspect-ratio layout space.
INP Target: < 200ms
Interaction to Next Paint
Excessive image sizes tie up the main thread during image decoding. Small WebP frees up CPU.
FCP Target: < 1.8s
First Contentful Paint
Lightweight logos, icons, and hero sections ensure visitors see above-the-fold content instantly.
1. Next-Gen Formats (AVIF & WebP)

WebP is 30% smaller than JPEG with identical visual quality. AVIF can save up to 50%. Google PageSpeed directly penalizes websites serving unoptimized JPEGs or PNGs.

2. Always Provide Explicit Dimensions

Missing width and height attributes cause layout shifts while loading. Always define explicit dimensions (e.g. width="800" height="450") on every image tag.

3. Smart Lazy Loading

Never lazy-load your Hero image (it delays your LCP). Use fetchpriority="high" for the hero, and loading="lazy" for all below-fold images.

4. PSI Target Thresholds

Hero Image: < 80 KB · Thumbnails: < 40 KB · In-article Images: < 50 KB · Logo & Favicon: < 10 KB.

✨ Interactive Blogger CDN WebP Converter (-rw Trick)

When uploading photos to Blogger, Google hosts them on its global CDN. Adding -rw to the image URL instructs Google's server to automatically convert and deliver WebP format with zero plugins!

Optimized Blogger CDN WebP URL (-rw):
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj8.../s800-rw/sample.jpg
Optimal Responsive Blogger Image Snippet 
<picture>
  <!-- Modern AVIF or WebP first for modern browsers -->
  <source srcset="image.avif" type="image/avif">
  <source srcset="image.webp" type="image/webp">
  <!-- High-Performance Fallback Image with Zero CLS & Async Decoding -->
  <img 
    src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/s800-rw/photo.webp" 
    alt="SEO descriptive keyword rich alt text" 
    width="800" 
    height="450" 
    loading="lazy" 
    decoding="async" 
  />
</picture>