Resize an image to exact pixel dimensions for a website, a social media post, or an upload form with strict limits, with an option to lock the aspect ratio so nothing looks stretched.
Upload forms and ad platforms often specify a required size in pixels. An image that doesn't match usually gets awkwardly cropped or padded by whatever system receives it, so resizing ahead of time keeps you in control of how it actually looks in its final spot.
A social media platform wants an exact pixel size for a cover photo, or a website template specifies a required banner dimension. Get the size right before uploading instead of letting the platform crop it awkwardly.
Not if you keep Maintain Aspect Ratio checked. It adjusts the other dimension automatically when you change one.
Yes, though enlarging beyond the original resolution can make it look a bit softer, since no new detail is actually being created.
A PNG by default, which preserves quality well.
It varies, but 1600-1920px wide is a common range for balancing sharpness on large screens with reasonable file size. Run it through the Image Compressor afterward if the file still feels too large.