Turn a URL or short piece of text into a QR code that compatible cameras can scan. Verify the destination before you print or distribute it.
Lock the aspect ratio when changing only the width or height. A 1,200 × 800 image resized to 600 pixels wide becomes 600 × 400, keeping the same proportions. If you enter independent dimensions, faces and circles can look stretched.
Export as JPEG for ordinary photographs, PNG when you need lossless transparency, or WebP when a supported platform accepts it. Upscaling cannot recreate lost source detail, and file size can grow after re-encoding.
Check the resulting pixel dimensions and visual clarity. Enlarging a small image may produce blurry output rather than sharper detail.