Free Pareto analysis tool
Pareto Analysis Tool — Find What Matters Most in Your Data
Turn ranked data into a Pareto chart and a practical 80/20 view. See cumulative contribution, identify the vital few, and prioritize action without an account.
Interactive tool
Run a Pareto analysis on your own data
Paste data, import CSV content, or use the sample dataset to see your vital few and cumulative contribution.
Turn raw data into a clear 80/20 decision
Edit, analyze, compare and export — everything runs in your browser.
Your Pareto insight
The first 3 categories account for 80.3% of the total. Start your investigation here rather than treating every category equally.
Why use ParetoScope?
Works with pasted tabular data and common CSV workflows.
Ranks contributors automatically and calculates cumulative percentages.
Runs the core analysis in the browser, so your dataset can stay on your device.
Designed for business, quality, sales, operations, inventory, and support analysis.
Common use cases
Quality control and defect prioritization
Rank your data, identify the largest contributors, and focus improvement work where it has the greatest potential impact.
Sales and revenue concentration
Rank your data, identify the largest contributors, and focus improvement work where it has the greatest potential impact.
Customer and product analysis
Rank your data, identify the largest contributors, and focus improvement work where it has the greatest potential impact.
Inventory and operational bottlenecks
Rank your data, identify the largest contributors, and focus improvement work where it has the greatest potential impact.
Support tickets and recurring problems
Rank your data, identify the largest contributors, and focus improvement work where it has the greatest potential impact.
Marketing channel contribution
Rank your data, identify the largest contributors, and focus improvement work where it has the greatest potential impact.
Frequently asked questions
What is a Pareto analysis tool?
A Pareto analysis tool ranks categories by contribution and shows cumulative contribution so you can identify the small group of factors responsible for a large share of the outcome.
Can I use my own data?
Yes. ParetoScope is designed for category-and-value data that you can paste or import through the chart workflow.
Is Pareto analysis the same as the 80/20 rule?
They are closely related, but the 80/20 rule is a heuristic. A real dataset may produce a 70/30, 85/15, or another concentration pattern.