Validate your categories before you build
Run a closed card sort in minutes. Participants sort cards into your predefined categories — revealing which labels work, which confuse, and what needs fixing. Free forever.
No credit card required · Unlimited free studies · Setup in under 5 minutes
What is Closed Card Sorting?
Test whether your categories actually work
In a closed card sort, you define the categories upfront and ask participants to sort content items into them. This tests whether your existing labels and structure make sense to real users. If participants consistently put cards in the wrong category, you know that label or grouping needs work — before you spend development time building the wrong navigation.
Success Rate per Category
What percentage of cards land in the expected category? Low success = confusing labels or wrong grouping.
Misplaced Cards
Which cards end up in the wrong category — and where do they go instead? This reveals exactly what's confusing.
Time to Sort
How long do participants take? Slow sorting reveals hesitation even when they eventually choose correctly.
Features
Everything you need to run a closed card sort
Predefined Categories
Set up your category labels in advance. Participants sort cards into your structure — testing your IA assumptions directly.
Expected Answers
Define which category each card should land in. ValidateThat automatically calculates success rates and identifies misplacements.
Real-Time Results
See per-category success rates, misplaced cards, and sorting times update live as participants complete your sort.
Built-in Recruitment
Recruit verified participants (~$3.50/response) or share your card sort link anywhere. $40 free credit included.
AI Test Responses
Preview your card sort with AI-generated responses before recruiting real participants. Catch setup issues early.
No-Friction Participation
Participants open a link and start — no signup, no install. Drag-and-drop into your predefined categories on any device.
How It Works
Validate your categories in three steps
Define categories & cards
Enter your category labels and the content items (cards) you want tested. Set the expected category for each card. It takes about 5 minutes.
Collect responses
Share your card sort link or recruit participants via built-in recruitment. Participants drag cards into your predefined categories.
Identify problem areas
See which categories work well and which confuse users. Identify misplaced cards and fix labels before building your navigation.
Results Dashboard
See exactly which categories confuse users
Your closed card sort results update in real-time. Every category gets a success rate and a breakdown of misplaced cards — so you know exactly which labels need work and which cards belong somewhere else.
- Per-category success rates
- Misplaced card analysis (where do wrong cards go?)
- Average sorting time per participant
- CSV export for deeper analysis (Pro)
Open → Closed → Tree Test
Closed card sorting validates what you've built
After an open card sort reveals how users think, a closed card sort confirms your categories work. Then validate the full navigation with a tree test. ValidateThat lets you run all three in one project.
- Open, closed card sorts, and tree tests in one project
- Use open sort results to define closed sort categories
- Compare before/after closed sort success rates
- Share findings in a stakeholder report
Comparison
Closed card sorting tools compared
Stop shipping categories that confuse users.
Create a closed card sort in 5 minutes. Get results in hours. Know which labels work and which need fixing before you build.
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Use Cases
When to run a closed card sort
Validating an existing IA
Already have categories from an open card sort or stakeholder input? A closed sort tells you if those categories actually work for users.
Testing category labels
Renamed your navigation sections? Run a closed card sort to see if the new labels make sense before pushing to production.
Redesigning navigation
Proposed a new IA structure? Test it with a closed sort to find problem categories before investing in development.
Content migration
Moving content to a new structure? A closed card sort confirms users can find everything in the new categories.
Cross-team alignment
Stakeholders disagree on category names? Let users decide. A closed card sort provides objective data to resolve debates.
Before a tree test
Validate your categories first with a closed sort, then test the full navigation hierarchy with a tree test. Two layers of validation.
FAQ
Frequently asked questions
Your categories either work for users or they don't.
Find out which. Create a free closed card sort and get clear data on which labels resonate and which confuse.
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