A Beginner's Guide to Image Compression

Image compression is the process of reducing the file size of a digital image. This is vital for web performance, as smaller images load faster, leading to a better user experience and improved SEO.

Lossy vs. Lossless Compression

There are two main types of compression:

• Lossy Compression: This method removes some of the image data to achieve a smaller file size. While this data loss is permanent, a good lossy algorithm can significantly reduce size with little perceptible drop in quality. JPG and lossy WEBP are examples.
• Lossless Compression: This method reduces file size without removing any data. It works by finding more efficient ways to store the image information. The original image can be perfectly reconstructed. PNG, GIF, and lossless WEBP use this method.

When to Use Each

The choice depends on the image content:

• For photographs: Use lossy compression (JPG or WEBP). The complex color variations in photos are well-suited for this method, and you can achieve huge size savings.
• For graphics with sharp lines, text, or transparency: Use lossless compression (PNG or WEBP). Lossy compression can create ugly artifacts around sharp edges and text.

Our Image Compressor lets you experiment with different quality levels to find the perfect balance for your JPG and WEBP images.