Best Image Size for Websites & SEO

    Using the correct image size is critical for fast loading, better user experience, and higher Google rankings.

    Why image size matters for websites

    Images often make up the largest portion of a web page’s total size. Oversized images slow down page loading, increase bounce rate, and negatively affect SEO and Core Web Vitals.


    How image size impacts SEO

    • Improves page load speed
    • Boosts Core Web Vitals (LCP & CLS)
    • Reduces bounce rate
    • Enhances mobile performance
    • Improves Google search rankings

    Recommended image dimensions for websites

    • Hero images: 1200 × 600 px
    • Blog images: 800 × 400 px
    • Thumbnails: 300 × 200 px
    • Logos: 250 × 100 px
    • Background images: 1920 × 1080 px (compressed)

    Choosing the right image format

    • Use JPG for photographs
    • Use PNG for transparency and text
    • Use WebP for modern browsers when possible

    Ideal image file size for fast loading

    For best performance, keep image file sizes under:

    • Hero images: under 300 KB
    • Blog images: under 150 KB
    • Thumbnails & icons: under 50 KB

    How to optimize images for websites

    1. Resize images to required dimensions
    2. Select the correct image format
    3. Compress images before uploading
    4. Use responsive images where possible
    5. Lazy-load below-the-fold images

    Example: Optimized vs unoptimized image

    A 4MB camera image resized to 1200px and compressed can load under 200KB while looking visually identical to the original.


    Resize and compress images online

    Optimize your images instantly using our free, secure, and browser-based image resizing and compression tools.


    Resize Images →


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