UD5 Toolkit
Standard Deviation Calculator – Population & Sample
Compute standard deviation and variance for a dataset, automatically distinguishing between population and sample. See mean, sum of squares, and histogram.
Tag: Data Tools - Convert & Analyze
10+ toolsBar Chart Maker – Vertical & Horizontal Column Graphs
Create vertical or horizontal bar charts from your data. Enter categories and values to generate a clean, customizable chart ready for presentation use.
Scatter Plot Generator – Interactive X,Y Data Graphing
Create an interactive scatter plot from your own data. Add points, adjust axes, and see the trend line — all done locally in your browser with SVG/Canvas.
Histogram Generator – Bins & Frequency Distribution Online
Turn a list of numbers into a histogram. Choose the number of bins or let the tool auto-calculate using Sturges' rule. Visualize your data distribution instantly.
CSV Data Filter & Query - Online Spreadsheet WHERE Clause
Load a CSV file and filter rows using basic expressions (e.g., age > 30). Supports AND/OR conditions. Export filtered result as CSV. All in browser.
Text to Columns - Online Split by Delimiter
Paste delimited data and split it into columns. Choose custom separator. Shows a preview table. Local.
Data Table to Markdown - Online Paste & Format
Paste tab‑separated or CSV data and instantly get a beautifully aligned Markdown table. Essential for documentation.
CSV Column Filter - Online Keep or Remove Columns
Paste CSV data and pick which columns to keep or drop. Rearrange column order by dragging. Download the new file. All local.
JSON to CSV Converter - Online Free Data Translator
Easily convert JSON data arrays into CSV format for Excel or database import. Handles nested structures with flattening options. All conversions happen locally, no data uploaded.
Fuzzy Data Generator - Online Create Random Records
Generate random but realistic‑looking data arrays (users, products, orders) with typos and missing fields. For test robustness.