Line Chart Maker

A line chart connects your data points with a continuous line, making it the clearest way to show how a value moves across an ordered sequence — most often time. Track revenue month by month, temperature by hour, or signups by day, then overlay several lines to compare them side by side. Type or paste your numbers, shape the curve and markers, 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 Lines to Compare

Click Dataset to plot another line on the same axes — up to 10 in total. 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, up to 0.5 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.

Line Chart Features & Options

Line-Specific Controls

Option	Range	Effect
Curve Tension	0 – 0.5 (default 0.3)	Smooths the line from straight segments to gentle Bézier curves
Fill Area	On / off	Shades the space beneath each line for an area-style look
Point Size	0 – 8 (default 4)	Resizes the markers; set to 0 to hide them on dense data

Styling & Data Tools

Color Palettes

Six ready-made palettes, or pick a custom color per line to keep them easy to tell apart.

Multiple Datasets

Overlay up to 10 lines with automatic legends for direct comparison.

Excel & CSV Import

Paste rows from a spreadsheet — tab (TSV) or comma (CSV) — and the 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.

Line Chart Maker FAQ

Can I create curved (smooth) lines?

Yes. Raise the Curve Tension slider in Chart Options (up to 0.5) 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.

Can I plot more than one line?

Yes. Click Dataset to add up to 10 series. Each line gets a distinct color and its own legend label so the chart stays clear.

Can I build a line chart from Excel or CSV data?

Yes. Use Import and paste rows copied from Excel or Google Sheets. The delimiter is detected automatically — tab-separated (TSV) or comma-separated (CSV) — and the data table fills in for you.

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.

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.

What format can I download the chart in?

Charts export as a PNG image at 2x resolution on a white background, ready to drop into slides, docs, or reports.

Do I need an account, and is my data private?

No sign-up is needed. Charts render and export entirely in your browser, so your numbers never leave your device.