This can happen because the file size (of the image) is too large. Incorrect file sizes can also cause sites and apps to load very slowly.
Below is a list of recommended image file sizes. You can also read more about editing and resizing images in our Education Resources article on this topic .
NOTE: The image sizes below may also vary depending on what device is being used to view the site, app, etc. In almost all cases, JPGs or PNGs are the only supported formats (not GIFs).
Image Dimensions in EventsAir
Contact Photos – Square | 600x600 pixels |
Contact Photos – Passport | 600x800 pixels |
Attendee App (Modern theme) | 144 x 144 pixels (only appears inside EventsAir - useful if you have multiple apps) |
Attendee App (Modern theme) | Minimum 96px high and width:height ratio of at least 3:1 or 4:1, or greater. |
Attendee App (Modern theme) Splash image | 640 x 960 pixels - appears briefly when app is loading. |
Attendee App (Modern theme) | 1600 x 900 - margin of 250px on all edges if text/logo must appear to allow for resizing (central 'safe area' of 1100 x400 will NOT be cropped even when scaling for different devices). |
Attendee App (Modern theme) | In Modern theme, leave blank OR add a plain image and ensure high contrast with text. |
Attendee App (Modern theme) | 1440 x 288 (5:1 ratio) |
Attendee App – Icon | 144x144 pixels (only appears inside EventsAir) |
Attendee App – Splash Image | 640x960 pixels |
Attendee App – Header | 1440 pixels wide (any height is accepted) |
Attendee App – Background Image | 1440x2880 pixels |
Organizer App – Icon | 144x144 pixels |
Organizer App – Splash Image | 640x960 pixels |
Organizer App – Header | 1440 pixels wide (any height is accepted) |
Organizer App – Background Image | 1440x2880 pixels |
Event website – Header & Footer | 1200 pixels wide (any height is accepted) - this is a MINIMUM image size for viewing on mobile. You may have more success with images that are 1920 x1080px. |
Interactive Sites – Header & Footer | 1000 pixels wide (any height is accepted). Again, sites viewed on a mobile device may look different and you should test other options. |
Interactive Sites– Hotel Images | 371x255 pixels |
Email - Header & Footer | 640 pixels wide (any height is accepted) |
App Store Apps – Header & Footer | 1000px wide (any height is accepted) |
Image Dimensions in OnAIR
Remote Attendee Portal |
|
Session Thumbnail | 1920x1080 pixels |
OnAIR 2D Mode |
|
Portal Sponsor Images | 870x155 pixels |
Sign In Screen | 890x940 pixels |
Header Bar Image | 360x50 pixels |
Gamification Icon | 144x144 pixels |
Lower Thirds Background Images | 132x1280 pixels excluding logo (transparency allowed) |
Lower Thirds Logo | 144x144 pixels |
OnAIR 3D Mode |
|
Poster Lobby & Exhibition Hall Background | 1920x1920 pixels |
Exhibition Hall Panorama Image | 3840x1920 pixels |
Standard Exhibition Stand | 940x650 pixels |
Large Exhibition Stand | 1400x650 pixels |