Private Online Tools

Line graph maker for change over time

Plot one or more lines over time, with points, areas and axis titles - here in this tab, with nothing uploaded.

How to make a line graph

  1. Paste the time steps in the first column and a column per line.
  2. Name the axes, and choose points, smoothing or a filled area.
  3. Save the graph as PNG or SVG.

Why this one stays private

Line graphs track things over time - revenue, weight, a science experiment. The data is drawn here in the tab and never leaves it.

Questions

Can I paste straight from Excel or Google Sheets?

Yes. Copy the cells and paste them into the data box - they arrive as columns. You can also drop an .xlsx, .xls, .ods or .csv file; the first sheet is read.

What if some values are missing?

Leave the cell empty. The line breaks at the gap instead of inventing a value to draw through.

Should the axis start at zero?

For amounts, usually yes - it keeps the slope honest. Untick 'Start at zero' to zoom in on small changes in a large number, such as a temperature.

How many lines can I draw?

Up to eight with distinct colours. With four or fewer, each line is also labelled at its end, so readers do not have to match colours to a legend.

What can I save it as?

PNG at twice the screen size, for documents and slides; SVG, a vector file that stays sharp at any size and opens in Illustrator, Figma, Inkscape or PowerPoint; or copy the image and paste it straight into a doc or a chat.

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