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Change over time

Free Line Chart Generator

Use this free line chart generator to create a line graph from CSV, Excel, or pasted data. The line graph maker reads the first worksheet of an XLSX file, then follows change over time across one or more numeric series.

Start with your data ↓
Date or ordered label + numeric series
Your workspace

Create your line chart

CSV, TSV, XLS/XLSX or pasted cells. Your spreadsheet contents stay on this device.

Save or reopen data and style

Download a local file with your table, title, theme, source and notes. Reopening detects fields again; review chart-specific settings. No data is uploaded.

Start with your table or try the sample

Date or ordered label + numeric series

No account or server-side file processing.

Input requirements

Give the chart the right data

Use one unique date or label per row and 1–8 numeric series. Date mode accepts YYYY-MM-DD or YYYY/MM/DD and sorts chronologically. Ordered labels preserve row order with equal spacing. Missing values and duplicate X labels require correction. Series share one unit and one Y axis.

Maximum import: 10 MB, 2,000 rows including the header, 100 columns, and 20,000 cells. This tool accepts zero or absolute numeric values between 10⁻⁹ and 10¹²; rescale extreme values first. Excel imports read the first worksheet.

Choose deliberately

When to use a line chart

This line graph plotter helps you compare one or more series over dates or ordered labels, such as monthly revenue or daily sign-ups. Keep the same measurement unit across lines so comparisons make sense.

When to choose another chart

Unordered categories are easier to compare with the bar graph maker. To examine two numeric variables without connecting observations, use the scatter plot maker. For a few non-negative category values that form one complete total, choose the pie chart maker. A line connects observations; it does not prove what happened between measurements. Lines are straight, with no smoothing or forecasting.

From table to figure

Three steps to a useful chart

  1. Import and review

    Upload a spreadsheet, paste cells, or load fictional sample data. Review the automatically selected fields and correct them if necessary.

  2. Read and refine

    Inspect the values and any data warnings. Choose a publication style, canvas, title, and source note.

  3. Export your result

    Download editable SVG or PNG at 1×, 2×, or 3×. The original spreadsheet contents stay in your browser.

Before you create your chart

Why did my rows move?

Date mode sorts dates chronologically and spaces them by elapsed time. Ordered labels keeps the original row order. The selected mode is visible and editable.

Can I mix revenue and conversion rate?

Use separate charts for different units. This tool blocks explicit percentage and ordinary-number series on the same axis and does not provide a second Y axis.

How should Excel dates be formatted?

Format the date cells as yyyy-mm-dd before importing, or select Ordered labels if equal spacing is appropriate. Only the first worksheet is read.

Does Charttoolbox upload my data?

Spreadsheet contents are parsed, calculated, and rendered locally. Optional Google Analytics loads only after consent and does not receive filenames, spreadsheet contents, or generated chart data.