How to Compress JPG Images Without Losing Too Much Quality

JPG, also known as JPEG, is one of the most commonly used image formats, especially for photographs and colorful images. Its compression method can significantly reduce the size of an image compared with the original file.

The main trade-off is that JPG compression removes some image data in the process. The goal is to find a good balance between a smaller file size and acceptable image quality.

What Is JPG Compression?

JPG uses a type of lossy compression, which means some image information is removed to make the file smaller.

With moderate compression, the changes may be barely noticeable. However, using very high compression can make details look blurry and may create visible blocks or other compression artifacts.

Resize the Image Before Compressing

The dimensions of an image can have a big impact on its file size. If a photo is much larger than necessary for its intended use, resizing it first can reduce the amount of data that needs to be compressed.

Choose the Right Compression Quality

Rather than immediately selecting the lowest quality setting, start with moderate compression and check how the image looks.

If the file is still larger than you need, gradually lower the quality and check the result after each adjustment. This makes it easier to find a good balance between file size and image appearance.

Recommended JPG Compression Workflow

1. Keep a copy of the original JPG file.
2. Check the image dimensions and current file size.
3. Resize the image if its dimensions are larger than necessary.
4. Apply moderate JPG compression.
5. Check the compressed image for quality and clarity.
6. Lower the quality further only if you still need a smaller file.

Common JPG Compression Mistakes

Using the Lowest Quality Setting

Very low quality settings can make an image look blurry and introduce noticeable compression artifacts. In many cases, a slightly larger file will provide a much better result.

Compressing an Already Compressed File

Keep your original image and create new compressed versions from it whenever possible. Repeatedly editing and saving an already compressed JPG can gradually reduce its quality.

Ignoring How the Image Will Be Used

Different types of images have different requirements. A profile photo, document image, and website banner may need different dimensions and compression settings.

When Should You Use Another Format?

JPG works particularly well for photographs, but it may not be the best choice for every type of image.

• PNG is often a better choice for graphics that need transparency.
• PNG can also work well for certain screenshots, icons, and simple illustrations.
• WebP can be a useful option when the platform or website supports it.