Bar chart generator

Bar chart

Compare values across discrete categories with a common baseline. Create a private, publication-ready bar chart directly in your browser without transmitting sensitive rows off-device. Data is processed locally on your hardware with zero server uploads, enabling instant export to SVG, PNG, and Excel data.

Compare categoriescomparisoncategoriesconsulting

Edit the data, then export.

Everything runs in your browser. Your data is not uploaded.

Data

Paste tab-separated data from Excel or edit the cells directly.

Paste or import table data

Paste a header row, or choose a local CSV/TSV file. Files are read in this browser and capped at 500 rows.

Choose CSV/TSV

Appearance

Chart title

Palette

Width Data labels Gridlines Axes LegendBackground

Preview

Sample preview of the example data. The live chart takes over as soon as you start working.

SVG, PNG, and Excel exports are generated locally in this browser. PowerPoint export is temporarily unavailable while its dependency path is reviewed for a high-severity image parser advisory.

Visual Encoding & Comparative Anatomy

A bar chart visually maps categorical data to rectangular bars, where the length or height of each bar is proportional to the metric’s magnitude. It relies on a strictly anchored baseline of zero to allow accurate comparisons of size and proportion across different discrete groups. All data processing and rendering happens completely locally, guaranteeing strict privacy with no server uploads.

Input Format & Required Columns

Format input columns for bar chart with explicit headers and numerical measurements. Verify that rows represent discrete categories or observations without unformatted symbol artifacts.

Example Comparison Table

| Region | Q1 Revenue |

Best Practices for Category Comparison

Ensure sufficient visual distinction for bar chart marks across standard and high-contrast viewports.
Align text labels horizontally whenever possible to improve cognitive readability for bar chart elements.
Double-check scale boundaries and zero-anchors before exporting bar chart presentation artwork.

Data shape: Category and numeric value columns
Exports: SVG, PNG, and Excel data; PowerPoint export is temporarily unavailable pending dependency review.

How it works

You edit a table in this page. The renderer draws an SVG from those rows in your browser, then you can download SVG, PNG, or Excel data. The table is not uploaded to any external processing server.

Frequently asked questions

Why must bar chart axes always start at zero?

Because human visual perception encodes bar magnitude by area and length. Truncating the baseline distorts the ratio between bars and misleads the reader.

How many bars should I include in a single chart?

Between 5 and 15 bars is optimal for readability. For more than 20 items, consider a horizontal orientation or paginated display.

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

Bar charts are vastly superior when comparing more than 3-4 segments, when values are close in magnitude, or when precise ranking is required.

Which exports are available?

Trendalyzer exports SVG and PNG artwork plus Excel-compatible data locally in your browser.

Dot plotCompare category values with a compact point-based alternative to bars.Open Grouped bar chartCompare multiple series side by side across the same categories.Open Horizontal bar chartCompare categories with room for long labels and direct ranking.Open Lollipop chartCombine a thin baseline stem with a dot to emphasize ranked values.Open Radial bar chartCompare values around a circle when a radial presentation adds useful structure.Open Tornado chartCompare two opposing metrics, or show the positive and negative impact of inputs on a model.Open

Reviewed 16 August 2026.