✓ TestedWorks with CSV, Excel, Google Sheets → JSON-LD Schema
By dataclean.to team · 2026-02-12
Asana projects accumulate duplicate tasks when team members create new tasks without checking existing ones, when tasks are duplicated across multiple projects through multi-homing, or when CSV imports go wrong. A development team might have the same bug reported as three separate tasks in different project boards. dataclean.to identifies these duplicate tasks by comparing titles, descriptions, and assignees across your exported Asana data.
The Problem
Asana allows a single task to live in multiple projects (multi-homing), which means CSV exports of different projects include the same task multiple times. Beyond multi-homing, teams working across sprints often duplicate tasks from backlog boards into sprint boards, creating genuine duplicates with independent completion states. When you export all projects for reporting or migration, the resulting CSV has inflated task counts, making it impossible to calculate actual team workload or track true completion rates. Asana CSV import and export documentation
How to Fix It
1
Export tasks from Asana
Use Asana's built-in CSV export from the project dropdown menu or export across multiple projects using the Asana API. Include task name, project, section, assignee, due date, status, and description fields.
2
Upload the CSV to dataclean.to
Upload the exported task data. The tool scans task names and descriptions for similarity, identifying both exact duplicates (from multi-homing) and near-duplicates (separately created tasks for the same work).
3
Review task duplicate clusters
Examine flagged duplicate groups. For multi-homed tasks, you will see the same task appearing under different project names. For genuine duplicates, the tool highlights differences in due dates, assignees, and completion status.
4
Merge or remove duplicates
Consolidate duplicate tasks into single entries. For multi-homed tasks, keep one entry and note the associated projects. For genuine duplicates, merge subtasks and comments from both records into the primary task.
5
Export the clean task list
Download the deduplicated CSV for reporting, migration to another project management tool, or reimport into a clean Asana workspace with one task per unit of work.
Frequently Asked Questions
How does dataclean.to handle multi-homed tasks?
Multi-homed tasks have identical task IDs but appear in different projects. The tool detects matching task IDs and consolidates them into a single row with a combined project list, so your report reflects one task per unit of work.
Can the tool identify duplicate tasks with different titles?
Yes. The tool compares task descriptions and metadata beyond just titles. Two tasks named 'Fix login bug' and 'Resolve login page error' with similar descriptions and the same assignee would be flagged for review.
Will subtasks be preserved during deduplication?
Subtask data from all duplicate entries is combined into the merged record. If both duplicates have subtasks, the merged task retains all unique subtasks while removing exact subtask duplicates.
Example: Input → Output
name
email
phone
city
status
Alice Johnson
alice@example.com
+1-555-0101
New York
active
alice johnson
ALICE@EXAMPLE.COM
5550101
new york
Active
Red rows show common data quality issues. dataclean.to normalizes and generates JSON-LD automatically.