Sometimes an image is almost right except for the direction. Flipping horizontally or vertically fixes that without opening a full editor.
Upload the image, choose the flip direction, and preview the change immediately.
Horizontal flips are common for portraits and product shots. Vertical flips are useful for reflections and certain layout experiments.
Download the result in the format you need for the next step in your workflow.
If you still need resizing or compression afterward, continue with those tools once the orientation is correct.