What is the difference between Lossy and Lossless compression?

Lossless compression reduces file size by eliminating unnecessary metadata (EXIF, camera headers) and reorganizing pixel data without altering any pixels. Lossy compression subtly removes color variations that the human eye cannot perceive, achieving 70-90% smaller file sizes with virtually identical visual fidelity.

Is it safe to compress confidential documents or private photos on Udlo?

Yes! Unlike other online compressors that send your files to remote cloud servers, Udlo Image Compressor executes 100% in your local browser using HTML5 Canvas & WebAssembly. Your photos never leave your device.

Ultimate Guide: How to Compress JPG & PNG Images Without Losing Quality (Zero Uploads)

Discover the science of smart lossy vs lossless image compression. Learn how to shrink file sizes by up to 85% directly in your browser with zero server uploads and lightning speed.

Frequently Asked Questions

What is the difference between Lossy and Lossless compression?: Lossless compression reduces file size by eliminating unnecessary metadata (EXIF, camera headers) and reorganizing pixel data without altering any pixels. Lossy compression subtly removes color variations that the human eye cannot perceive, achieving 70-90% smaller file sizes with virtually identical visual fidelity.
Is it safe to compress confidential documents or private photos on Udlo?: Yes! Unlike other online compressors that send your files to remote cloud servers, Udlo Image Compressor executes 100% in your local browser using HTML5 Canvas & WebAssembly. Your photos never leave your device.