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Scatter Plot Maker — Free CSV XY Scatter Charts Online

Scatter plot from CSV — first column X, every following column a Y series. PNG export, runs in your browser.

Free No signup Client-side Privacy friendly Updated

How to use

  1. 1 Paste two-or-more-column CSV — first column is the X axis (numeric).
  2. 2 Every additional column becomes a series of (X, Y) points.
  3. 3 Download the scatter plot as PNG.

Why use this tool

  • Continuous X axis — perfect for correlation, regression-style plots, sample scatters.
  • Multiple series supported — each numeric column after the first becomes a series.
  • Chart.js loaded lazily — small initial bundle.
  • Pure client-side — your dataset never leaves the browser.

Frequently asked questions

Why are some points missing?

Rows where the X or Y cell is not a number are skipped silently — keeps preview tidy.

Can I show a trend line?

Not yet — switch to the <a class="underline" href="/line-chart-maker">Line Chart Maker</a> for connected segments.

Best chart type for categories?

For categorical X (months, names), use <a class="underline" href="/bar-chart-maker">Bar</a> or <a class="underline" href="/line-chart-maker">Line</a>.

What is Scatter Plot Maker?

A Scatter Plot Maker is a tool that creates scatter plots from CSV data in the browser. It treats the first column as X values and each following column as a separate Y series, plotting the resulting points on a two-axis chart. The plot can be exported as a PNG image, and all processing runs client-side without uploading data.

Features

Multi-series XY points from CSV columns

The first CSV column is parsed as the numeric X value for every row; each additional column becomes its own dataset of (X, Y) points, auto-colored from a 10-color palette.

Non-numeric rows silently skipped

Any row where the X or a Y cell fails Number.isFinite parsing (parseFloat) is dropped from that series so the plot stays clean instead of erroring.

One-click PNG export

Download renders the live canvas to a PNG data URL with canvas.toDataURL('image/png') and triggers a browser download — no server round-trip.

Client-side only, no upload

CSV parsing (RFC 4180-compliant, handles quoted fields with embedded commas/newlines) and Chart.js rendering both run in the browser; the CSV text never leaves the page.

Example

Input

Hours,Score
1,55
2,62
3,70
4,74
5,80
6,86
7,88
8,93

Output

scatter-plot-maker.png — canvas-sized PNG (matches the on-screen preview element, no fixed pixel dimensions), 1 series (Score) of 8 points on linear X/Y axes, point color #10b981 at 70% fill opacity with a solid border, legend shown

Common use cases

  1. 1

    Correlation checks between two numeric variables

    Paste paired values (e.g. Hours,Score) to visually inspect whether X and Y trend together before running a formal regression elsewhere.

  2. 2

    Plotting multiple Y series against a shared X axis

    Add extra numeric columns to overlay several measurement series (e.g. sensor readings, test scores) against the same X values on one chart.

  3. 3

    Quick visual QA of raw sample data

    Spot outliers or gaps in a small dataset by pasting it directly and seeing which rows get skipped as non-numeric before cleaning the source CSV.

Summary

Scatter Plot Maker turns pasted CSV text into an XY scatter chart rendered with Chart.js 4 on an HTML canvas, treating the first column as numeric X values and every following column as a separate Y series of (X, Y) points on linear axes. The result can be exported as a PNG via canvas.toDataURL(). All CSV parsing and chart rendering happen client-side in the browser — no file is uploaded to a server.

Category
Creator
Pricing
Free
Privacy
Browser-based
Signup
Not required

References

Privacy

Your data never leaves your browser unless explicitly stated. Scatter Plot Maker runs entirely client-side — no server upload, no logging, no tracking of your input.

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