How to Migrate Projects from Trello to ClickUp Without Losing Custom Fields, Attachments, or Automations
Direct Answer: To migrate Trello boards to ClickUp without data loss, navigate to ClickUp Settings → Import/Export → Trello, authenticate Atlassian OAuth permissions, and map boards into isolated ClickUp Lists. Before running the job, map Trello color labels explicitly to ClickUp Dropdowns (not free text), match team member emails, and pull an offline JSON export as a safety backup.
When my operations team outgrew the standard kanban architecture of Trello, the biggest anxiety was not learning a new tool. It was the terrifying prospect of data corruption during the migration process.
Most SaaS teams hit a hard wall when scaling: Trello is intuitive for linear tracking, but ClickUp offers multi-dimensional views, native sprints, and granular time tracking. However, relying blindly on default auto-importers frequently wipes nested comments, unlinks large attachments, and shatters Butler automations.
I executed this entire board transition across multiple active workspaces with zero data loss. Below is the battle-tested, step-by-step engineering manual to safely transition your team's project pipeline.
1. The Pre-Migration Hygiene Checklist
Never import dirty data. Migrating clutter into an advanced platform only magnifies administrative inefficiency. Before initiating any API handshake, take thirty minutes to audit your boards.
Archive completed tasks, purge outdated attachments, and ensure naming conventions across your Trello lists are unified. This substantially accelerates API transmission speeds.
Action 1: Export a Local Archival JSON Backup
Do not rely solely on cloud-to-cloud transfer protocols. Head to your Trello Board Menu → More → Print and Export → Export as JSON. Store this offline file safely on your encrypted local drive.
Access Trello Workspace →
[Visual Verification 1: Trello Export Menu]
Ensure 'Export as JSON' downloads completely before initiating API handshakes.
Screenshot Reference: Trello Board Menu > More > Print and Export
Action 2: Map Organization Users Early
Send ClickUp invitations to every team member before importing. If team emails do not match identically, task assignments will drop into unassigned status pools.
2. Step-by-Step Technical Migration Workflow
ClickUp provides a native OAuth integration with Atlassian's Trello API. Following this exact sequence prevents timeout failures during large data transfers.
Step 1: Access the Native Import Engine
In your ClickUp workspace, click your profile avatar in the bottom-left corner. Navigate to Settings → Workspaces → Import / Export. Click on the Trello integration card.
Open ClickUp Settings →
[Visual Verification 2: ClickUp Import Console]
Select 'Trello' from the native cloud sync modules to launch the OAuth listener.
Screenshot Reference: ClickUp Settings > Import/Export > Trello
Step 2: Authorize Atlassian OAuth Tokens
A popup prompt will request read permissions for your Trello boards. Authorize the connection to allow ClickUp's background workers to pull card payloads.
Step 3: Board and Workspace Mapping
Select which Trello Boards map into specific ClickUp Spaces. We strongly recommend creating a dedicated Space titled "Imported Projects" to stage and verify data before distribution.
Step 4: Custom Field Resolution
This is where standard imports break. Trello uses color-coded labels, while ClickUp uses distinct custom fields. Map Trello labels directly to ClickUp Dropdown Fields or Tags rather than standard text strings.
3. Data Entity Conversion: Trello vs ClickUp
Understanding how data objects translate across APIs prevents operational confusion after the migration concludes.
| Trello Feature |
Equivalent in ClickUp |
Migration Behavior |
| Board |
Folder or List |
Fully preserved as a distinct List structure. |
| Card |
Task |
Titles, descriptions, and assignees transfer directly. |
| Checklist |
Checklists / Subtasks |
Imports as task checklist items seamlessly. |
| Butler Automations |
ClickUp Automations |
Not transferred. Must be recreated manually. |
| Cover Images |
Task Cover / Attachment |
Retained within card file storage attachments. |
4. Rebuilding Trello Butler Rules in ClickUp
The biggest manual bottleneck post-migration is automation recovery. Trello's Butler rules do not cross API boundaries due to structural trigger differences.
Take an inventory of your primary Butler triggers. In ClickUp, navigate to Automations → Add Automation. Recreate standard workflows such as: *When status changes to Done → Archive task and notify Project Lead*.
20 Frequently Asked Questions: Trello to ClickUp Migration
1. Will migrating boards overwrite my existing ClickUp tasks?
No. ClickUp appends imported boards as new Lists within your selected Space without overwriting existing data.
2. What happens to file attachments larger than 25MB?
ClickUp Free accounts apply upload thresholds. Paid plans handle large files smoothly, but maintaining an offline JSON archive ensures zero media loss if upload limits trigger.
3. Can I import closed or archived Trello cards?
Yes, ClickUp prompts you during setup to select whether to include archived cards or restrict the import to active cards only.
4. Do card comments retain their original timestamps?
Comment contents and author attributes transfer cleanly, though ClickUp timestamps the ingestion event as the latest update date.
5. How long does a standard board migration take?
A board with 500 cards and moderate attachments typically migrates in 5 to 12 minutes via the cloud API.
6. Can I re-run the import if a connection error occurs?
Yes. However, delete the partially imported List in ClickUp first to avoid duplicate tasks.
7. Are Power-Ups data fields imported automatically?
Standard Atlassian custom fields map directly to ClickUp Custom Fields during setup. Third-party vendor widgets require manual configuration post-import.
8. What happens to cards with multiple assignees?
ClickUp supports multiple assignees natively on all plans, mapping them accurately if user emails match.
9. Will card due dates maintain recurring intervals?
Due dates import accurately, but recurring schedule rules must be activated within ClickUp task options post-import.
10. Can I import multiple Trello boards simultaneously?
Yes. ClickUp allows bulk selection of all boards associated with your authorized Atlassian account.
11. Does ClickUp notify team members during the import process?
Notifications are automatically suppressed during the bulk import process to avoid inbox spam.
12. How do custom labels convert during the import?
You can configure them to import either as standard ClickUp Tags or convert them into specific dropdown values.
13. Does Trello delete my original board after migration?
No. The migration is purely a read-and-copy process. Your Trello boards remain completely untouched.
14. What happens if a team member has not joined ClickUp yet?
Their assigned tasks will import as unassigned, or you can route them to an administrative placeholder account.
15. Are external Google Drive attachment links preserved?
Yes. Hyperlinked cloud files embedded in card descriptions or attachments remain active web links.
16. Can I undo a complete board import?
Yes. ClickUp features an "Undo Recent Import" button available in settings for up to 24 hours post-transfer.
17. Do checklist percentages translate accurately?
Checklist items carry over itemized, and ClickUp displays overall checklist completion percentages immediately.
18. What is the API rate limit for Trello migrations?
ClickUp handles API throttling automatically via background batch queuing, ensuring zero token drops.
19. Can I migrate cards directly into existing ClickUp templates?
It is safest to import into a clean List first, and subsequently apply workspace templates to that List.
20. What is the immediate step after import completion?
Audit task counts across each list against your Trello board to verify complete numerical parity.
My Takeaway: Migration Is an Upgrade, Not Just a Transfer
Migrating from Trello to ClickUp marked a major productivity turning point for my team. The initial apprehension surrounding data loss vanished once we realized that proper pre-migration hygiene makes the process foolproof.
Take your time with custom field mapping. Run a single test board before migrating your entire company backlog, and use this transition to refine your team's operational workflows.
About the Author
Written by Sethupathi S, workflow automation researcher and publisher at SaaSethu. Specializing in cloud infrastructure optimization, API integrations, and digital efficiency systems for growing global businesses.
Technical Disclaimer: This article documents real-world SaaS migration workflows for educational and informational purposes only. Trello and ClickUp are registered trademarks of their respective corporations. API configurations and interface layouts update periodically; always maintain local offline backups before executing bulk system imports.
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