Banner images appear in more places than most people realize and each context has its own dimension requirements. A website header banner is not the same size as a Twitter cover image, which is not the same as a LinkedIn banner or a YouTube channel art image. Getting the wrong size means the banner either gets cropped in an unexpected place, leaves blank space on the sides or gets stretched to fill a container it was not built for. Preparing the banner at the exact dimension the platform or layout expects is the one step that makes it look like it belongs there rather than being retrofitted from something else.
How to Resize an Image for a Banner
Enter the width and height dimensions for the specific banner context in the corresponding fields. Banner dimensions vary significantly by platform and use case. For website headers, the width typically matches the site layout width and the height depends on the theme. For social media cover images, each platform has its own specified dimensions. If the original is already close to the target ratio, leaving the Maintain Aspect Ratio checkbox on scales cleanly. If it is a different shape, turn it off to force the exact dimensions.
Upload multiple banner sizes for different platforms at once and download everything as a ZIP when done.
Common Banner Sizes Reference
Twitter header: 1500x500 pixels. LinkedIn personal cover: 1584x396 pixels. LinkedIn company cover: 1128x191 pixels. YouTube channel art: 2560x1440 pixels. Facebook cover: 820x312 pixels on desktop. Website hero banner: 1920x600 pixels is a common starting point though this varies by theme. Email header banner: 600x200 pixels is a common email template width. Leaderboard ad banner: 728x90 pixels. Half page ad: 300x600 pixels.
Output Format for Banner Images
JPEG is the standard choice for photographic banner content. It keeps file sizes manageable for fast loading in website headers, email campaigns and social media profile loads. PNG is better for banners with text overlays, brand logos, flat color backgrounds and graphic design elements where clean edge rendering matters at the full banner width. WEBP is worth using for website header banners where image loading speed has a direct impact on page performance scores.