When it comes to MMS (Multimedia Messaging Services) there are a few important things to keep in mind.
Use JPG or GIF file formats
MMS supports many image file formats, but we recommend staying with a more standard and common format. Unfortunately, not all devices you may be sending to will support the newer formats, so it's a good rule of thumb to stick to tried and tested formats to maximize deliverability.
Tip: For images, we recommend either JPG or GIF, but only use a GIF when sending animated images
Image resolution should be less than 640 pixels wide
The image you are using should not be wider than 640 pixels and no taller than 1,138 pixels. This ratio (9:16) is a portrait ratio and is optimized for viewability on mobile screens. However, you can use other ratios, such as square (1:1), while staying within these dimension constraints for MMS.
Common MMS image ratios
Portrait - 9:16 ratio - 640x1138px
Square - 1:1 ratio - 600x600px
Landscape - 16:9 ratio - 1280x720px
Image file size should be 300 KB or less
Many carriers will reject your message if the image is too large, and you may also see an error in TxtCart. The best practice is to keep the file under 300KB. While newer versions of MMS support larger formats, smaller is generally better. To check your image size, right-click it and select "Properties," or use an image resizing tool before uploading.
Pricing Considerations
By adding a media file to an SMS, your message will automatically turn into an MMS, which has a different rate (the specific rate depends on your subscription plan).
Tip: As a general rule of thumb, carriers impose a 1MB limit on file sizes
Still have questions?
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