Line Chart Maker

A line chart connects data points with a continuous line, making it the clearest way to reveal how a value changes over an ordered sequence — usually time. Track revenue month by month, temperature by hour, or visitors by day, then overlay several series to compare trends. Type or paste your data, tune the curve and points, and export a crisp PNG.

When to use a line chart: reach for it when your x-axis is continuous or ordered (days, weeks, quarters) and the story is about direction and rate of change rather than comparing isolated categories.

Common Use Cases

Trends Over Time

Show growth, decline, and seasonality across months, quarters, or years at a glance.

Compare Multiple Series

Plot several lines together to compare products, regions, or plan versus actual on one timeline.

Monitor Metrics

Track KPIs, sensor readings, or performance figures and spot spikes and dips immediately.

How to Create a Line Chart

Enter Your Data

Put your sequence labels (months, dates, steps) in the first column and the values beside them. Use Add Row for more points, or Import to paste straight from Excel or Google Sheets.

Add Series to Compare

Click Dataset to plot another line on the same axes. Each series gets its own color from the palette and its own legend entry.

Shape the Lines

Open Chart Options to set the Curve Tension (0 for straight segments, higher for smooth curves), adjust Point Size, and enable Fill Area to shade beneath each line.

Export as PNG

Add a title, position the legend, then click PNG to download a 2x-resolution image on a white background.

Live preview: tension, point size, and fill update the chart the instant you move a slider or tick a box.

Features & Options

Line-Specific Controls

Option	Effect	Tip
Curve Tension	Smooths the line from straight segments to gentle curves	Set to 0 for precise data, raise it for a polished look
Fill Area	Shades the space beneath each line	Turns a line chart into an area-style chart
Point Size	Resizes the markers at each data point	Use 0 to hide markers on dense data

Styling & Data Tools

Color Palettes

Six ready-made palettes keep multiple lines easy to tell apart.

Multiple Datasets

Overlay several series with automatic legends for direct comparison.

Excel & CSV Import

Paste rows from a spreadsheet and the data table fills itself in.

Avoid clutter. Too many lines turn into a tangle. Keep it to a few series, or split unrelated metrics into separate charts.

Frequently Asked Questions

Can I create curved (smooth) lines?

Yes. Raise the Curve Tension slider in Chart Options to bend the connecting lines into smooth Bézier curves. Set it to 0 for straight point-to-point segments.

How do I fill the area under a line?

Tick the Fill Area option. Each line is shaded down to the baseline, giving a result similar to an area chart while keeping the line emphasis.

When should I use a line chart instead of a bar chart?

Choose a line chart when the x-axis is continuous or ordered — typically time — and you want to emphasize the trend between points. Use bars when comparing separate, unordered categories.

Can I plot more than one line?

Yes. Click Dataset to add as many series as you need. Each line gets a distinct color and its own legend label so the chart stays clear.

How do I hide the point markers?

Drag the Point Size slider down to 0. This is useful when you have many data points and want a clean, uninterrupted line.

Is my data sent to a server?

No. Charts render and export entirely in your browser. Your numbers never leave your device.