DjVu (pronounced "déjà vu") is a new image compression technology allows the distribution on the Internet of very high resolution images of scanned documents, digital documents, and photographs.

With DjVu we typically can achieve compression ratios about 5 to 10 times better than existing methods such as JPEG and GIF for color documents, and 3 to 8 times than TIFF for black and white documents.

Scanned pages at 300 DPI in full color can be compressed down to 30 to 100kb files from 25mb. Black-and-white pages at 300 DPI typically occupy 5 to 30kb when compressed.