Star Chart Generator: Create Custom Sky Maps & Constellations

Create radar and spider charts instantly. Compare multivariate data visually for skills assessments, stats analysis, and performance reviews for free.

Data (Label, Value per line)

Example: Quality,4

Quality4

Speed3

Comfort5

Support2

Value4

How this Star Chart Generator works

This astronomical tool renders a map of the night sky for a specific date, time, and location. Users input their city or coordinates, and the tool calculates the positions of stars, constellations, and planets visible at that moment. Useful for education, stargazing planning, or creating custom "star map" gifts. It relies on precise celestial mechanics algorithms to project the 3D sky onto a 2D map relative to the observer's horizon.

Multi-Metric Visualization

Compare multiple variables at once with radar/spider charts. Perfect for skills assessments, product comparisons, game stats, and performance reviews. See strengths and weaknesses at a glance with this powerful visualization.

Radar Visualization

Star Chart Features

100% Private

Your data stays in your browser. No uploads, no tracking.

Multiple Axes

Compare 3-8 variables on a single radial grid for comprehensive analysis.

Compare Profiles

Overlay multiple data sets to see how they stack up against each other.

SVG Export

Download high-quality SVG files for presentations and reports.

How this Star Chart Generator: Create Custom Sky Maps & Constellations works

How to use this Star Chart Generator: Create Custom Sky Maps & Constellations

Define Your Axes

Enter 3–8 metric names (e.g., Speed, Accuracy, Teamwork) to set up the radial axes of your star chart.

Input Values

Score each axis on a consistent scale (e.g., 0–10) for one or more profiles you want to compare.

Export the Chart

Download the radar chart as an SVG for use in reports, scorecards, or presentations.

Example Usage

Each axis extends from the center (0) to the outer edge (10). The filled polygon makes it easy to see which skills are strong and where there are gaps at a single glance.

Input

Axes: Speed (8), Accuracy (6), Communication (9), Problem-Solving (7), Teamwork (10)

Output

A five-axis radar chart with a filled polygon showing the candidate's profile across all five competencies.

Frequently Asked Questions

What does a Star Chart Generator do?

Also called radar or spider charts, star charts display multivariate data on a radial grid. They are great for comparing profiles, skills, or performance across multiple categories.

When should I use a star chart?

Use star charts when you have 3-8 variables and want to compare one or more entities across all of them. Common uses include skill assessments, product comparisons, and sports analytics.

How many axes can I include?

For readability, stick to 3-8 axes. Too many axes make the chart crowded and hard to interpret. If you have more variables, consider grouping or using a different chart type.

Is this Star Chart Generator private?

Yes. It runs 100% client-side, so your data stays in your browser and is never uploaded to any server.

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The Star Chart Generator: Create Custom Sky Maps & Constellations is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.

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