How to Minimize Image Size for a Large E-Commerce Website [+ 3 Powerful Hacks and Tools]

In the modern digital marketplace, a picture is worth potential sales. E-commerce websites rely heavily on product images to lure in customers. But the larger the images, the larger your website becomes.

Large images are necessary for quality visuals but can affect your site’s overall performance. They can cause slow load times, frustrated shoppers, and potentially lost revenue.

This article discusses how to minimize product image sizes for a responsive and high-ranking e-commerce website.

Image Dimensions and Proportions

Image dimensions and proportions are crucial when optimizing product images for your e-commerce site. It’s about reducing the size and ensuring your images display properly and look appealing to your customers.

Image Size

Image size is the physical dimensions of an image measured in terms of width and height and expressed in pixels. It’s essentially the space that the image occupies on a screen.

For example, 1920×1080 pixels means a width of 1920 units and a height of 1080. Maintain consistent dimensions for all your product images. Use responsive images; they’ll adapt to different screen sizes to serve appropriately sized images to mobile, tablet, and desktop users.

File Size

File size is the amount of digital storage space the image occupies. It’s measured in bytes—kilobytes (KB), megabytes (MB), and gigabytes (GB).

Besides the primary image data, it contains image metadata, transparency and resolution information, color profile, and file format-specific data.

Aspect Ratio

An image’s aspect ratio defines the relationship between its length and width. It is expressed as a ratio of width to height. For example 3:2.

When minimizing the size of your product images, you must maintain the original aspect ratio. Otherwise,  you’ll experience distortion, such as a rectangular product image appearing squished and losing its intended proportions. This may make the product look wider or taller than it should, potentially misleading customers.

How to Minimize Image Size for a Large E-Commerce Website

Choose the Suitable Image Format

Your choice of format can significantly affect the quality and size of your product images. Using Shortpixel’s Autoptimize features helps narrow down to the most suitable image format.

image size
  • JPEG (Joint Photographic Experts Group): Use JPEG for product photos and images with complex color gradients, such as clothing, electronics, and product shots with intricate details.
  • PNG (Portable Network Graphics): Opt for PNG if your product images have transparency or require lossless compression, such as images with simple graphics, logos, or transparent backgrounds.
  • WebP: Consider WebP, which combines good compression with quality and is suitable for a wide range of product images. It supports lossy and lossless compression, but browser support may vary.

The best format for your product images may depend on the platform. Platforms like WooCommerce or Shopify have recommended image format guidelines, and they may offer automatic image optimization options that take the guesswork out of choosing the format.

In practice, a combination of formats is necessary for different types of product images. For example, you may use JPEG for product photos and PNG for transparent images.

Choose the best format for your product images based on the specific image content and balance image quality with website performance.

Compress Your Product Images

Compressing images reduces their size while attempting to maintain their visual quality. This is through compression techniques, which can be categorized into two: lossless and lossy compression.

Lossless compression: Reduces the file size without any loss of image quality. It identifies and eliminates redundancy in image data without sacrificing detail.

Use lossless compression for product images with a transparent background, images with sharp lines, edges and text, and where visual quality is crucial

Lossy compression: Involves some loss of image quality in exchange for smaller file sizes. It removes less essential image data, such as subtle color variations. Use it for photographs and images with complex color gradients. JPEG is the most common lossy image format.

When compressing product photos,

  • Use the least amount of compression that maintains acceptable image quality.
  • When using JPEG, adjust the compression settings to find the right balance between image quality and file size.
  • Remove any extra detail or elements from the image that don’t contribute to the product’s representation. This can include excess white space, backgrounds, or irrelevant objects in the frame.
  • Don’t forget to compress thumbnail images and alternate product views. 

Resize and Crop Images

Resizing is adjusting the physical dimensions of an image—its width and height—while keeping the original aspect ratio intact.

Cropping is cutting out a specific portion of the image. This is particularly useful for eliminating unnecessary or distracting elements and focusing on the product.

Cropping reduces the image size, while resizing adapts your product images to different screen sizes and devices. Use image editing software or e-commerce tools with resizing features to resize product images.

When resizing,

  • Maintain Aspect Ratio: Always preserve the aspect ratio to avoid image distortion. Most image editing software allows you to do this automatically.
  • Choose Optimal Dimensions: Determine the ideal dimensions for your product images based on your website’s design. Smaller thumbnail images may be appropriate for product listings, and larger images on individual product pages.
  • Quality vs. File Size: Strike a balance between image quality and file size. While reducing image dimensions reduces the file size, overly aggressive resizing can affect image clarity and product presentation.
  • Test Responsiveness: After resizing, thoroughly test your website on various devices to ensure the product images adapt well to different screen sizes.
  • Crop Thoughtfully: When cropping, focus on the most important elements of the product. Highlight key features, details, or the product itself. Avoid cropping in a way that removes crucial information or context.

Tools for Minimizing Image Size

Image Editing Tools

Image editing tools allow you to reduce image size through resizing, compression, and converting to a smaller format. Three examples of such tools are

  • Adobe Photoshop has comprehensive image manipulation capabilities. You can precisely control image dimensions, apply lossless or lossy compression, and save images in various formats.
  • GIMP is a free and open-source alternative. Its extensive community support and availability on multiple platforms make it a cost-effective choice.
  • TinyPNG is a web-based tool explicitly for image compression. It uses smart algorithms to reduce file sizes significantly while maintaining quality.

Online Compression And Resizing Tools

These tools don’t require installation. You can access them through your web browser, making them accessible from any device and, thus, convenient.

Web-based tools provide near-instant results. Once you upload an image, the tool processes it rapidly and offers the compressed or resized version for download, like TinyPNG.

Other examples are:

  • ImageOptim: A web-based tool that offers lossless compression for users who prioritize image quality. It’s particularly useful for transparent PNGs or images that need to maintain the highest possible quality.
  • Optimizilla: It’s known for its user-friendly interface and real-time image previews. You can adjust compression levels individually for each image in a batch, ensuring flexibility and fine-tuning.

WordPress Image Optimization Tools

If you’re using a WordPress e-Commerce site, the platform has image optimization features and tools for reducing image sizes.

WordPress itself has useful features like custom settings for thumbnail product images and themes with responsive designs. These other tools or plugins offer more control over image compression and resizing.

They include

  • ShortPixel: It has a user-friendly interface and automatically optimizes product images when uploading. It offers lossless and lossy compression, converts images to next-gen formats like WebP, and resizes images to your dimensions.
  • Smush: Smush specializes in image compression. It streamlines the process for existing and newly uploaded product images using lossy or lossless methods.
  • EWWW Image Optimizer: Optimizes product images in real-time and adapts compression levels to different image types and formats.

With these plugins, you can present your product images in the best form. They also have other valuable features like lazy loading, bulk optimization, conversion to WebP formats, and image caching to speed up your site.

Minimize Your Product Image Sizes for a Faster Website

By reducing image size, you’re ensuring your large e-commerce website looks its best and loads swiftly, capturing the hearts and wallets of your customers.

Remember, it’s an ongoing process, and regular image optimization should be a part of your e-commerce routine. Evaluate your product images’ optimization needs. If you need to minimize them, choose the right tools that will enable you to trim the entire product catalog images and future uploads.

Review your product images, select the proper format, then apply compression and resize thoughtfully. Don’t forget to consistently test, monitor, and adapt as needed. 

Karol Carter
Karol Carter

Karol Carter is an experienced author and expert in various aspects of web development, online business, and digital marketing. Having worked with notable companies such as Automattic, Adobe, Ahrefs, Ecommerce Platforms,,, CodeinWP, WinningWP, and Smashing Magazine, Karol has honed a wide range of skills and knowledge in the industry. From monetizing a blog to understanding the basics of SEO, designing websites, creating engaging content, and optimizing online visibility, Karol has covered it all.

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