Images slow down pages all the time. You upload a photo, hit publish, and don’t realize it’s 5MB until traffic drops.
Google recrawls most sites every 3-7 days. If your pages are bogged down by huge images, you’re wasting that crawl budget on slow-loading content.
What Is a Image Size Checker?
Image Size Checker is a free browser-based tool that scans every image on a webpage. It shows you the file size, dimensions, format, and whether alt text is missing.
You don’t need an account. Paste a URL, hit check, and it gives you a full breakdown in seconds.
Why It Matters for SEO
Big images delay page load. Every second above 2 seconds increases bounce rates by up to 32%. Google uses load speed as a ranking factor — plain and simple.
The real issue is that most people assume “small on screen” means “small file.” That’s wrong. A 100px preview can still be a 4MB file if it's unoptimized.
Google’s Core Web Vitals mark anything over 0.1 seconds delay on image loading as a penalty risk. Slow visuals hurt your score.
How to Use It
- Go to https://scrawl.tools/tools/image-size-checker (no login needed)
- Paste any live URL into the field and click “Check Images”
- Wait 10-30 seconds while the tool pulls every image, its size, format, and alt status
The whole thing takes less than a minute. It’s free and works on mobile and desktop.
What the Results Tell You
You get a table listing every image: file name, size in KB or MB, dimensions in pixels, format (JPG, PNG, WebP, etc.), and alt text status.
Big red rows highlight oversized files — usually anything over 300KB. You’ll see exactly which images hurt performance.
Most people miss that PNGs are often 3-5x larger than WebP versions. If you’re using PNG for screenshots or banners, you’re wasting bandwidth.
Here’s what actually happens: you think you’re saving time by uploading directly from your camera or design tool. But those files are raw. They need compression.
The tool also flags missing alt text. Google can’t “read” images. Without alt text, you lose ranking signals and accessibility.
You can export the list or just fix the top 3 offenders. That usually cuts total image weight by 60% or more.
3 Mistakes Most People Make
- Ignoring file format — JPG isn’t always best. WebP saves 40–60% more than JPG without quality loss. Many CMS platforms still default to older formats.
- Uploading full-resolution photos — A 4000px DSLR image scaled to 400px on screen still loads at 4000px. That’s pointless. Resize before uploading.
- Skipping alt text — Some alt fields are blank because people think “it’s decorative.” But even decorative images should have `alt=""`. Empty or missing tags hurt accessibility and SEO.
Most people don’t check images after publishing. That’s why issues pile up. Ten 2MB images add 20 seconds to load time on mobile.
Use the Core Web Vitals Checker to see how those delays hit your actual score.
Closing
Stop guessing which images are dragging down your site.
Try the free tool now: https://scrawl.tools/tools/image-size-checker