JPEG Lossless Rotator is a free program which lets you rotate your images without losing image quality. What, you mean you didn’t know that every time you rotate – or indeed edit – a JPG file it loses quality? Tsk!
Anyhoo, this software accomplishes its magic by doing some kind of ‘block’ transformation, whatever that means. It’s available in 24 different languages, comes with hotkey support (e.g. r for rotate right etc) and Windows Explorer integration for all your right mouse click enjoyment. Cool product for the toolbox. Oh, do remember to take a copy of the photo first, because the program overwrites the original.
Is the rotation by JPEG Lossless Rotator really lossless? It is lossless for any JPEG/JPG file, if its width and height (number of pixels) are divisible by 16 or 8 (depends on the digital camera or the way the image was created). Almost all common photo’s formats have width and height divisible by 16. For example, 3456×2304, 3072×2304, 2816×2112, 2560×1920, 2496×1664, 2048×1536, 1728×1152, 1600×1200, 1280×960, 1024×768, 800×600, 640×480, 320×240. If your camera creates photos with a size that is not divisible by 16, JPEG Lossless Rotator may not suit you.