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How to Use: GeoCapsule

Cutterfy Team
November 7, 2025

What is GeoCapsule?

GeoCapsule is a unique privacy tool that allows you to encrypt a digital message and tie it to a specific real-world GPS location. The message is stored in a special .gseal file that can only be decrypted and read when the recipient is physically within a close radius (50 meters) of the location where it was "sealed."

History of this Feature

The concept of geocaching and digital dead-drops has been around since the early days of GPS technology. GeoCapsule takes this idea and adds a layer of privacy and intrigue by using location as the "key" for encryption. Instead of relying solely on a password, it uses the geographic coordinates to derive the encryption key. This feature was created to explore a novel form of cryptography and provide a fun, private way to link digital information to physical places.

Who Commonly Uses This Feature?

This tool is perfect for creating digital scavenger hunts, location-based games, or private messages tied to meaningful places (like an anniversary spot). It's used by people looking for a creative way to share secrets, as well as by those interested in cryptography and location-based technologies.

How to Use GeoCapsule

GeoCapsule lets you create digital messages that can only be opened at specific real-world locations. It's completely private and all data is processed in your browser.

To Seal a Capsule (Create a Message):

  1. Select "Seal a Capsule" mode.
  2. Type your secret message in the text box.
  3. Set the target location by either manually entering the Latitude and Longitude or by clicking "Use Current" to capture your device's GPS location.
  4. Click "Seal & Download Capsule". A special .gseal file will be saved to your device. Share this file with your recipient.

To Unseal a Capsule (Open a Message):

  1. Select "Unseal a Capsule" mode.
  2. Upload the .gseal file you received.
  3. The app will request your current location. You must be physically within 50 meters of the target location for the capsule to open.
  4. If your location matches, the secret message will be decrypted and revealed on the screen.

This tool is perfect for creating digital dead-drops, location-based games, or private messages tied to real-world places.