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Correlation Analyzer Field Guide: When Three Correlation Methods on One CSV Return Three Different Stories
Correlation analysis looks simple on the surface: paste a CSV, get a coefficient between -1…
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Regression Lives in the Browser Now
A regression line is the simplest summary a dataset can give you. Run a straight…
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Coefficient of Variation Calculator Field Guide: When Standard Deviation Lies About Variability and Three CSV Columns Quietly Disagree on Spread
Strong close-first lead. Standard deviation sounds like the most rigorous spread metric you can compute,…
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Calendar Heatmap Generator Field Guide: When 365 Squares, Five Color Buckets, and One Date Threshold Decide Whether Your Yearly Activity Reads as a Real Streak or a Flat Wall
A calendar heatmap is one of the densest visual instruments — 365 squares, 5 color buckets, 1 year of activity. Field guide to scale decisions, failure modes, and pre-ship checks.
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Funnel Chart Generator Field Guide: When Five Stages And Three Number Formats Decide Whether Your Conversion Story Reads As A Real Pipeline Or A Toy Bar
A funnel chart looks simple until you put real numbers on it. Real sales pipelines…
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Data Crosstab Generator Field Guide: When the Pivot Table Is Doing Six Things
Three rows, three columns, one decision. A crosstab (or pivot table) collapses thousands of rows…
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Org Chart Maker Field Guide: When a JSON Hierarchy Beats a Hand-Drawn Box
Org Chart Maker turns a nested JSON object into a vertical organizational chart in one paste. Field guide on shape, palettes, pitfalls, and the cases where you actually wanted a tree or mind map instead.
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ECharts Theme Token Extractor Field Guide: When the Theme Object Finally Meets the Design System
Your ECharts theme is a JSON tree of design decisions; your design system is the…
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XLSX Freeze Pane Manager Field Guide: Lock the Headers Without Clicking View 47 Times
Lock the headers, scroll the data. When a workbook grows past a few screens, the…
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Regex Railroad Diagram Visualizer Field Guide
A railroad diagram is the easiest way to see what a regex actually means. Paste…