⚡ Website Performance Tool

Image Health Checker

Check image size, dimensions, format, performance and basic SEO factors. Then optimize your image instantly.

100% Privacy-Friendly: Your files never touch a server
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Check Your Image Health

Drag & drop images here or click to browse

JPG, PNG, WebP, GIF, BMP and TIFF
🔒 Your images are processed directly in your browser. They are not uploaded to a server.

Understanding Your Image Health Score

What the checker looks at

The Image Health Checker inspects each image's file size, pixel dimensions and format, estimates how efficiently it is compressed, and gives basic SEO suggestions. The result is a score you can use to decide whether an image is ready for the web.

Why image health matters

On many pages the largest element a visitor waits for is an image. Heavy or oversized files slow that down, which hurts the experience on mobile connections and can affect how well the page performs in search.

How to act on the results

  • File size too large: run it through Compress Image
  • Dimensions much bigger than the space it is shown in: use Resize Image
  • Old or heavy format: convert photos to WEBP or JPG with Convert Image

A few rules of thumb

Many web images work well under roughly 100 to 200 KB, and there is rarely a reason to upload a photo wider than the largest size it will be displayed at. Descriptive file names and meaningful alt text also help search engines and screen readers understand what an image shows.

Checked privately

The analysis runs in your browser. Your images are not uploaded to be checked.

Related guides: Image Health Checker guide · Image optimization for SEO

Frequently Asked Questions

It analyzes file size, pixel dimensions, format, compression efficiency, and basic SEO readiness (like whether the filename and dimensions are search-friendly), then gives each image a health score with specific suggestions for improvement.

No. The entire analysis runs locally in your browser using the File and Canvas APIs. Your images are never uploaded anywhere.

Large, unoptimized images are one of the most common causes of slow page load times, and page speed is a factor in search rankings. Oversized dimensions and heavy file sizes also waste bandwidth for every visitor, especially on mobile.

If the checker flags a large file size, use our Compress Image tool. If dimensions are larger than needed for display, use Resize Image. Both run in the same browser-based, upload-free way as this checker.