Free Lossless vs. Lossy Compression

What is Lossy Compression?

Lossy compression permanently removes some data from the original file to significantly reduce file size. This method is highly effective for photographs and complex images where the human eye cannot easily detect the removed data. Formats like JPEG aggressively use lossy compression.

What is Lossless Compression?

Lossless compression reduces file size without losing any of the original image data. When the image is uncompressed, it is mathematically identical to the original file. This is crucial for graphics, icons, text-heavy images, or medical imaging. PNG is a common lossless format.

The Privacy Angle

When you compress files locally using 100% client-side execution, your original uncompressed files and the resulting compressed files represent high-fidelity data that never leaves your device. Offline compression ensures instant privacy regardless of the compression method chosen.