Is this chart generator free?

You can use this interface and public URLs for typical trial work. Commercial-scale or white-label needs may differ - read the site terms.

Do I need JavaScript to display the chart?

Not when you embed the image URL. Optional script embeds exist separately in the docs.

Can I use charts in email?

Often yes, via ` `. See [charts for email](/charts-for-email).

Can ChatGPT generate these URLs?

Yes - [AI chart generator](/ai-chart-generator) collects prompt text for that.

Where is the main builder?

The [chart maker](/chart-maker) is the full-featured sibling page with the same engine.

Free chart generator

No account wall on this workflow: you edit fields, preview an image, and copy a link. Paid features may add API keys or remove branding later - today the focus is a working URL.

Chart builder

Adjust fields and copy URL, HTML, Markdown, or an AI prompt. See the [URL parameters](/docs/url-parameters) reference if you are editing links by hand.

Chart title

Chart type

Labels (comma-separated)

Series 1 name

Series 1 values

Series 2 name (optional)

Series 2 values (optional)

Width

Height

Value format

Show legend

Format

Preview

Copy

Show snippets

URL

https://getchartkit.com/api/chart?type=bar&labels=Jan,Feb,Mar,Apr,May&s0=12000,18000,15000,22000,27000&s0name=Revenue&title=Monthly%20Revenue&w=700&h=420&valueFormat=compact

HTML

Markdown

![Monthly Revenue](https://getchartkit.com/api/chart?type=bar&labels=Jan,Feb,Mar,Apr,May&s0=12000,18000,15000,22000,27000&s0name=Revenue&title=Monthly%20Revenue&w=700&h=420&valueFormat=compact)

What “free” means here

You do not pay ChartKit to try the builder or to fetch charts from the public host for personal experiments. Output may include a small watermark unless your deployment turns it off for paid keys.

The output is still a normal GET `/api/chart?…` address - safe to paste into Markdown, email HTML, or a static site.

For CSV paste, the CSV to chart page adds a dedicated import box.

Use cases

Students or PMs who need one clean graphic without installing Python or a BI suite.
Open-source readme files where maintainers want a chart image from shared numbers.
Drafting investor updates where the final design might move to Figma but the first cut is a URL.

Examples

Starter bar URL

https://getchartkit.com/api/chart?type=bar&labels=A,B,C,D&s0=12,19,15,22&s0name=Count&title=Buckets&format=svg&w=640&h=400

Donut for share mix

https://getchartkit.com/api/chart?type=donut&labels=X,Y,Z&s0=55,30,15&s0name=Mix&title=Split&format=svg

Line + compact ticks

https://getchartkit.com/api/chart?type=line&labels=2021,2022,2023,2024&s0=1.2,1.8,2.4,3.1&s0name=ARR+M%24&valueFormat=compact&title=Growth&format=svg

How it works

Pick any supported `type`, fill labels and at least one numeric series, then load the preview.
Copy URL, `<img>`, Markdown, or the AI prompt block.
Read URL parameters when you assemble links outside the UI.

Use with ChatGPT or Claude

Free also applies to how you teach LLMs: give them the short ChartKit parameter vocabulary once.

Compare with online chart generator if you care about the in-browser story.

FAQ

Is this chart generator free?: You can use this interface and public URLs for typical trial work. Commercial-scale or white-label needs may differ - read the site terms.
Do I need JavaScript to display the chart?: Not when you embed the image URL. Optional script embeds exist separately in the docs.
Can I use charts in email?: Often yes, via `<img src="…">`. See charts for email.
Can ChatGPT generate these URLs?: Yes - AI chart generator collects prompt text for that.
Where is the main builder?: The chart maker is the full-featured sibling page with the same engine.