How to Easily Link Trello Cards Across Boards in 2025

Want to sync cards across Trello boards? Click HERE to try our power up for free!

Trello is a fantastic tool for managing tasks and projects, but as your workflow grows, so do the number of boards and cards in your workspace. Before long, you might find yourself hopping between boards trying to track related tasks.

A common problem? Keeping related tasks connected across boards without losing track of updates. Maybe you’re managing tasks for multiple teams, or you want a centralized overview of everything. Whatever the case, linking cards between boards is a powerful way to streamline your workflow.

The good news is that Trello offers a couple of ways to solve this problem! In this post, I’ll walk you through two different approaches: a simple built-in method and an advanced solution using FullZinc’s Card Mirror Power-Up.


Simplest Method: Attaching Cards Across Boards

If all you need is a simple way to connect one Trello card to another, you can use Trello’s built-in attachment feature. Here’s how:

  1. Open the Card You Want to Link:
    Go to your Trello board and open the card you’d like to link to another.
  2. Click the “Attachment” Button:
    Look for the attachment icon on the card (on the right hand side of the card with a paperclip icon next to it).
    • The "attachment" button on the back of a Trello card
  3. Search for the Other Card:
    In the attachment popup, type the name of the card you want to link. Select the correct card from the search results.
  4. Alternatively, Paste a URL:
    If the card doesn’t appear in the search results, open the other card, copy its URL, and paste it into the search box.

That’s it! Your card is now linked to the other card. Trello creates an attachment with a clickable link back to the connected card.

  • Showing a linked card attachment on the back of a card

Above and Beyond: Limitations of Basic Linking

While the above method is quick and easy, it comes with a major limitation: the cards aren’t truly synced.

Edits, comments, or checklist updates made on one card won’t be reflected on the other. If you need to keep both cards updated automatically, you’ll need a more advanced solution.

Enter FullZinc’s Card Mirror Power-Up—a tool designed to sync Trello cards across boards seamlessly.


Using FullZinc’s Card Mirror Power-Up to Link Cards Across Boards

FullZinc’s Card Mirror Power-Up allows you to create a true connection between cards on different boards. Any edits, comments, or updates made on one card are automatically reflected on its mirrored counterpart. Here’s a quick overview of how it works:

1. Set Up the Power-Up

2. Create a Mirror Card

  • Click the “Create Mirror” button on the back of the card you want to mirror.
    • The FullZinc "Create Mirror" button on the back of a Trello card
  • Select the target board and list where you’d like the mirrored card to be created.

3. Enjoy Instant Syncing

Once the mirror is created, any updates made to one card (labels, checklists, comments, etc.) will sync automatically to the other card. It’s like having the same card in two places at once!


Why Choose FullZinc’s Card Mirror Power-Up?

  • Free to Start: Your first 5 mirror cards are completely free.
  • Simple Setup: No external tools or complicated integrations required—just a few clicks to get started.
  • Complete Syncing: Everything on the card syncs instantly, including members, labels, due dates, and custom fields.

By the way, if you’d like to dive deeper into how FullZinc’s Power-Up works, check out our detailed guide here.


Conclusion

Linking Trello cards across boards can make your workflow smoother and more efficient. Whether you go for Trello’s built-in attachment method or the advanced syncing capabilities of FullZinc’s Card Mirror Power-Up, you’ll save time and avoid the hassle of jumping between boards.

Ready to try FullZinc’s Card Mirror Power-Up? Add it to your board today and start syncing cards effortlessly across boards!

Want to sync cards across Trello boards? Click HERE to try our power up for free!