FullZinc’s Card Mirror Power-Up makes it easy to sync Trello cards between boards, saving you time and keeping your workflows organized. This post isn’t about why you should mirror Trello cards — that’s covered in our comprehensive guide here. Instead, we’ll walk you through some more detailed steps, troubleshoot common issues, and help you understand what gets mirrored. Whether you’re syncing tasks across teams or creating a master board, this practical guide will get you up and running in no time.
Did we mention it’s free? Your first 5 mirror cards are completely free with FullZinc’s Power-Up. Let’s dive in!
What Is FullZinc’s Card Mirror Power-Up?
Power-Ups are add-ons for Trello that enhance its functionality. We (FullZinc Software) created a Power-Up that lets you sync Trello cards between boards. It sounds simple, but Trello doesn’t natively offer this feature as of 2025!
With our Card Mirror Power-Up, you can ensure that any changes made to a card on one board are instantly reflected on its mirrored card on another board. It’s perfect for keeping multiple boards in sync without manual copy-pasting.
How to Set Up the FullZinc Card Mirror Power-Up
Setting up our Power-Up is quick and easy. Follow these steps:
- Log in to Trello: Visit Trello here.
- Add the Power-Up: Use this link to add FullZinc’s Card Mirror Power-Up to your board.
- Authorize the Power-Up: Open any Trello card and click the “Authorize” button.
- Enable the Power-Up on Additional Boards: If you want to create mirrors on other boards, repeat the process for each board.
Important Notes:
- To create a mirror from Board A to Board B, the Power-Up only needs to be active on Board A.
- Team members must also authorize the Power-Up individually to create mirrors, but their edits to existing mirror cards will sync regardless.
How to Mirror a Trello Card
Mirroring a card is simple. Here’s how to do it:
- Open a Card: Click on the card you want to mirror.
- Click “Create Mirror”: You’ll see this option on the card’s back.
- Select the Target Board and List: Use the form to choose the board and list where the mirrored card will be created.
- Test the Sync: Make edits to the original card or the mirrored card, and watch the changes sync instantly!
Features of FullZinc’s Card Mirror
Here’s what makes our Power-Up stand out:
- Free Tier: Your first 5 mirror cards are free — no other Power-Up offers this.
- Simple to Use: Just a few clicks to set up. No need for external websites or complex setups.
- Instant Syncing: Changes reflect immediately, without frustrating delays.
- Complete Syncing: All card details sync, including:
- Members
- Labels
- Checklists
- Attachments
- Comments
- Custom fields
Troubleshooting and FAQs
Here are common issues and how to resolve them:
- Syncing to a Board Without Lists:
- Error: “The destination board has NO LISTS! Create one first.”Solution: Add at least one list to the destination board before mirroring.
- Observer Role Restrictions:
- Error: “You are an OBSERVER on this board, cannot edit cards.”
- Solution: Ensure you’re a full member of both the source and target boards.
- Card Mirror Limit Reached:
- Error: “Your workspace is at its card mirror limit. Please click this button to increase it.
- Solution: Upgrade your plan by clicking the “Increase Limit” button.
FullZinc’s Card Mirror Power-Up is designed to be easy to use and powerful. With this guide, you’ll be able to sync Trello cards across boards seamlessly. If you run into any other issues, don’t hesitate to reach out to us via email at support (at) fullzinc.com
Ready to get started? Add the FullZinc Power-Up to your board now and start syncing!