Free Line Chart Maker Online
Create smooth line charts from your data and download as PNG — all in your browser.
Data
Preview
How it works
Enter your data
Add labels and values in the data table. Edit or remove rows at any time.
Choose style options
Set chart title, line colour, fill area, smooth curves, and point visibility.
Preview live
The line chart updates instantly as you type — no refresh needed.
Download PNG
Export the chart as a PNG image. Your data stays in your browser.
Common use cases
Trend analysis
Visualise website traffic, revenue growth, temperature changes, or any metric over time.
Stock and finance
Plot price movements or portfolio performance across months or years.
Reports
Add clean line charts to PDF reports and presentations without a charting library.
Scientific data
Plot experimental measurements or sensor readings with connected data points.
Frequently asked questions
Can I add multiple lines?
Currently one dataset is supported. For multiple lines, use a spreadsheet tool and screenshot, or export the data to a full charting library.
What is the smooth curve option?
Enabling smooth curves uses cubic Bézier interpolation (tension: 0.4) instead of straight line segments.
Can I fill the area under the line?
Yes — enable the Fill area toggle to shade the region between the line and the x-axis.
What library powers this?
Chart.js 4.4.4 — served from a local file, no CDN. No data leaves your browser.
What resolution is the downloaded PNG?
The canvas renders at 800×400px by default. Resize your browser window to change the canvas dimensions before downloading.
Is my data sent anywhere?
No. Chart.js runs entirely in the browser — no server communication.