Using MERMAID Collect Offline

If you’re working in a remote location or anywhere without reliable internet, MERMAID has you covered. With offline mode, you can enter data in MERMAID Collect just like you would in Excel—no internet needed. Your project, sites, and management regimes will be fully available and ready to use in the field.

Getting Ready to Collect Data Without Internet

There are a few important things to do while you're still online. These steps will sync your project and make sure you and your team can collect data offline without any disruptions. Make sure to follow these steps before going offline.  

What to Do Before Going to the Field

1. Set up your project

While online, make sure your project is created and includes:

  • All team members who will collect data

  • All survey sites

  • All relevant management regimes

Tip: You can add or copy sites and management regimes in advance to make sure everything is ready before going offline, and to avoid users creating duplicate sites or management regimes.

2. Add your team to the project

Only project admins can add users. Double-check that:

  • Everyone who will collect data has been added to the project

  • They are assigned the Collector role

  • They appear under the Users tab with their name visible (not listed as “pending user”)

Important: If someone appears as a “pending user,” it means they haven’t created or finished creating their account. Make sure they sign up at app.datamermaid.org, complete the setup, and verify their email address (if the user does not use a Google account).

3. Mark the project as Offline Ready

On the Projects page:

  • Find the project you want to use offline

  • Ensure that there’s a checkmark next to Offline Ready. The Offline Ready box is checked by default when a project is created

  • If it’s not checked, click Offline Ready to sync the project for offline access

Click “Offline Ready” to sync your project for offline access.

4. Test offline mode

Make sure everything works before you go:

  • In MERMAID Collect, click the You're ONLINE toggle (bottom left)

  • It should change to You're OFFLINE with a red border around the screen

  • Turn off your Wi-Fi or disconnect from the internet, but do not log out from your MERMAID account

  • Restart Google Chrome

  • Open app.datamermaid.org and enter some test data in your Collecting page

If you can see the project and enter data, you're ready!

Test offline mode in advance to ensure your project is ready in the field without an internet connection

5. Confirm your team is ready too

Each team member should:

  • Log in to MERMAID Collect while online

  • Confirm they can see the project, sites, and management regimes

  • Switch to You're OFFLINE and verify access

Once all steps are completed, your project is synced and your team is ready to collect data offline.

Important:

  • Do not sign out of your MERMAID account. Stay signed in before going offline.

  • You can safely turn off your computer or close your browser—just don’t log out.

  • To access MERMAID offline, go to app.datamermaid.org using Google Chrome. You can bookmark MERMAID Collect in your browser for easy access.