Turn it the right way
Choose a still JPEG, PNG, or WebP to see its preview. Click Rotate left or Rotate right for each quarter-turn, or flip the image horizontally or vertically. Each action updates the displayed result without clearing it. Reset orientation returns to the starting view. Download when it looks right. Repeated edits always use the original pixels, so they do not repeatedly compress the previous result.
Keep the pixels, choose the file
A 1200 × 800 image becomes 800 × 1200 after a quarter-turn. It keeps the same number of pixels. Leave Original format selected for the same file type. For JPEG/WebP, size matching may lower encoder quality; switch it off to use 90% quality. The result tells you the actual size and quality used.
If you only need to remove photo data, use the Photo metadata remover, which preserves compressed image data. For smaller dimensions, use the Image compressor.