Question 1

What is a butterfly chart (tornado chart)?

Accepted Answer

A butterfly chart is a chart for comparing two data sets by placing them symmetrically on the left and right. It is mainly used to compare demographic statistics and survey results. It got its name because each bar chart looks like the wings of a butterfly.

Question 2

What is another name for a butterfly chart?

Accepted Answer

It is also called a Tornado Chart.

Question 3

When should you use a butterfly chart?

Accepted Answer

It is mainly used for purposes such as the following. Comparing two groups: It is very effective for visually comparing two contrasting data sets, such as the population structure by gender, satisfaction comparison between product A and product B, or the distribution of opinions between supporters and opponents. Comparing components: You can compare the distribution for each category (e.g., age group, region) and grasp at a glance which category has the largest difference.

Question 4

What can I do with this tool?

Accepted Answer

With this tool, you can easily create a "butterfly chart" on the web. It is mainly suited for comparing data from two groups. For example, you can visualize the population by age group split by gender, or supporting and opposing opinions from a survey. All data processing is completed within your browser. Note that reloading or closing the page will reset your input.

Question 5

How do I enter and edit data?

Accepted Answer

You operate this in the "Data Input" section on the left side of the screen. Editing existing data: Click directly on each cell value to change it. Label names (e.g., "Teens", "20s") can be edited the same way. Adding a row: Enter a new label and value in the input fields below the table and press the "Add" button, and the new data row will be reflected in the chart. Deleting a row: Click the "×" icon on the right of each data row to delete that row. Editing a column: Click the pencil icon next to each column label (e.g., "Male", "Female") to change the column's name or the chart color, or to delete the column itself.

Question 6

How do I change the appearance of the chart?

Accepted Answer

Various customizations are possible in the "Chart Style" section. Layout: You can switch the chart between vertical and horizontal orientation. Bar thickness and corners: You can adjust the thickness and corner rounding of the bars. Show/hide legend, axes, and gridlines: By toggling switches, you can show or hide the legend (chart description), the X-axis and Y-axis labels, and the background gridlines respectively.

Question 7

Can I use data other than "Male" and "Female"?

Accepted Answer

Yes, of course. Column labels can be changed freely. For example, enter the names of any two groups you want to compare, such as "For" and "Against", "Plan A" and "Plan B", or "2023" and "2024".

Question 8

Is the data I enter saved on the server?

Accepted Answer

No, the data you enter is never sent to or saved on a server. All data processing is completed within your browser. Note that reloading or closing the page will reset your input.

Question 9

How can I save the chart as an image?

Accepted Answer

Click the "Download Image" button below the preview area to download your chart in PNG/JPEG/SVG format with your chosen quality. If you want to change the aspect ratio, drag the handle at the bottom-right corner of the preview frame to adjust it.

Question 10

Is there an auto-save feature?

Accepted Answer

Yes, there is. Your chart data is saved automatically to your browser's local storage. When you reload the page, or close and reopen your browser, you can restore the saved data. You can also revert to the default data by pressing the reset button at the top-right of the data input area. Local storage data is saved only in your browser and is not shared with other users. If local storage is disabled in your browser settings, the auto-save feature will not work. Clearing your browser cache will also delete the saved data.

Question 11

How do I save my data temporarily?

Accepted Answer

Click the "Save & Publish Chart" button below the preview area to temporarily save your chart. You can re-edit it later using the URL and password issued when you saved it. You can also publish the chart publicly via URL.

Question 12

How do I load saved data?

Accepted Answer

You can load a chart using the "Resume from Saved Data" button. When loading, enter the URL and password issued when you saved it.

Free Butterfly (Tornado) Chart Maker

Preview

Data Input

Settings & Style

Frequently Asked Questions

How to Use Free Butterfly (Tornado) Chart Maker

Enter your data

Customize the design

Download the image

All Free Graph & Chart Tools

Bar Charts & Comparison

Line & Area Charts

Pie Charts & Proportions

Distribution & Statistics

Hierarchy & Relationships

Flow & Process

Shapes & Space

Quality Control (QC)

Others

Free Butterfly (Tornado) Chart Maker

Preview

Data Input

Settings & Style

Settings & Style

Frequently Asked Questions

Q.What is a butterfly chart (tornado chart)?

Q.What is another name for a butterfly chart?

Q.When should you use a butterfly chart?

Q.What can I do with this tool?

Q.How do I enter and edit data?

Q.How do I change the appearance of the chart?

Q.Can I use data other than "Male" and "Female"?

Q.Is the data I enter saved on the server?

Q.How can I save the chart as an image?

Q.Is there an auto-save feature?

Q.How do I save my data temporarily?

Q.How do I load saved data?

How to Use Free Butterfly (Tornado) Chart Maker

Enter your data

Customize the design

Download the image

All Free Graph & Chart Tools

Bar Charts & Comparison

Line & Area Charts

Pie Charts & Proportions

Distribution & Statistics

Hierarchy & Relationships

Flow & Process

Shapes & Space

Quality Control (QC)

Others