Line Chart Generator – Plot Trends and Time Series Online
The Line Chart Generator is the fastest way to turn a column of numbers into a clear trend line — website visits per week, temperatures per day, revenue per quarter, sensor readings per second. Type or paste your data, and the chart redraws live as you edit. It supports up to eight series at once, adapts automatically to light and dark mode, and exports print-ready images — all locally in your browser with no account and no upload.
From Spreadsheet to Chart in One Paste
Use the Table tab to edit values in place, or copy a range straight from Excel or Google Sheets into the Paste tab. The first column supplies the X values and every additional column becomes its own line, so a multi-series dataset imports in a single step; a header row is recognized automatically and used for the series names. The Upload CSV tab accepts files in the same shape:
Month,This year,Last year
Jan,42,38
Feb,48,41
Mar,55,44A Smarter X-Axis
Most online chart makers treat every X value as an evenly spaced label. This generator checks your data first: if every X value is a number — 0, 2.5, 10, 40 — it plots a true numeric x-axis with proportional spacing and sorts the points, exactly what you want for measurements and experimental data. If any X value is text (Jan, Feb, Week 1), it falls back to clean category spacing in row order. No setting to remember; it just does the right thing.
Curves, Points, and Fills
Choose how the line is drawn: Straight segments for the honest default, Smooth for a monotone curve that rounds the corners without overshooting your data, or Step for values that change at discrete moments, like prices or version numbers. Toggle point markers (each dot wears a thin surface-colored ring so it stays legible where lines cross), add a subtle area fill under each line, force the Y-axis to start at zero for magnitude comparisons, and turn on Label final valuesto print each series' last value at the end of its line — the classic way to headline a trend.
Honest Handling of Missing Data
An empty cell produces a visible gap in the line rather than a fake zero, so missing measurements are never disguised as real ones. When bridging is what you want — say, a sensor that skipped a reading — enable Connect gaps and the line spans across the empty cells instead.
Colorblind-Safe by Default, Export-Ready Always
Series colors come from a colorblind-safe palette applied in a fixed, maximally distinguishable order, with separate tunings for light and dark backgrounds; any series can be recolored with its picker. A legend appears automatically once you add a second series, and the hover tooltip reads out exact values for every line at the cursor. When the chart is ready, download it as a 2×-resolution PNG or scalable SVG, copy the image to your clipboard, or export the data itself as CSV.