How to Compress Images to a Specific Size?

Photopea (photopea.com)

Advantages: Powerful functionality with rich editing options. When exporting images, you can select the export format through the "File → Export as" menu, and then manually set the image quality and resolution parameters in the popup window. This approach gives users complete control.

Disadvantages: Although feature-rich, its main problem is the inability to automatically compress images to a specified target size. You need to constantly try different combinations of quality and resolution, then check the generated image file size until you find the parameters that meet your requirements. This process can be tedious.

TinyPNG (tinypng.com)

Advantages: Clean and beautiful interface with intuitive and easy-to-use operations. Users only need to upload an image, and the tool automatically performs lossless or lossy compression without any manual parameter adjustment. This makes it an ideal choice for beginners, especially when compressing images.

Disadvantages: Due to its fully automated design, users cannot specify compression to a specific size (such as compressing to within 500KB). The compression result is entirely determined by the algorithm, and users have limited customization options.

ExactKB

If you're looking for a tool that combines powerful functionality with ease of use to compress images, ExactKB is exactly what you need. This website perfectly combines the advantages of the above two tools and implements breakthrough innovative features on top of that.

Why Choose ExactKB for Image Compression?

• Combines Two Major Advantages: Like Photopea, ExactKB allows you to freely set image resolution and quality parameters, giving you complete control. At the same time, its interface design is equally simple and intuitive, as easy to use as TinyPNG, with no learning curve required.
• Precisely Compress Images to Specific Sizes: Most importantly, ExactKB implements a feature that neither of the previous two websites have—you can directly specify the target image size (e.g., 500KB), and the tool will automatically calculate the optimal compression parameters to achieve this target. No more trial and error!
• Flexible Image Compression Strategies: You can choose different compression methods:
  • Change resolution only (keep original quality)
  • Change quality only (keep original resolution)
  • Change both resolution and quality (for optimal compression)
• Prevent Over-compression: When choosing to compress by changing resolution, you can also set a minimum resolution limit to prevent the image from being compressed too small and losing clarity. This ensures that the compressed image remains acceptable in visual quality.