The first commercially available SD card with an integrated wireless transmitter and its compatible successors. Competitor of the Toshiba FlashAir.

The Eye-Fi Card supports wirelessly sending JPEG photos to a device running qualifying versions of Windows, macOS, iOS or Android over an user-preprogrammed Wi-Fi network.

Since its release newer models have been released, including or being capable upon the purchase of premium services of:

  • Instant photo upload to supported gallery and social networking sites;
  • Video handling;
  • RAW image handling;
  • Automatic connection to partner and unsecured Wi-Fi networks;
  • Direct Mode, enabling the card to create a Wi-Fi network if no other connections are configured or available;
  • Approximate geotagging based on the MAC addresses of nearby networks;
  • Endless Memory, which automatically deletes known to be already received photos when free space becomes lower than an arbitrary percentage;
  • Eye-Fi View, a free 7-day (unlimited for a premium) cloud backup, review and sharing solution;
  • Option to exclude all items but those marked as read-only from automatic sharing or the whole workflow.

Unlike their later competitor, the Toshiba FlashAir, it cannot be accessed on demand over HTTP, being engineered for use with Eye-Fi proprietary software. Other criticisms include the reliance on Eye-Fi owned servers for most of the functionality and the requirement of using the PC software to change some settings, most notably the network list.