Paste one Label, Value pair per line, then click Visualize to draw the chart. You can also skip the label and paste just numbers - the tool names each bar automatically. Your data is processed entirely in the browser and is never uploaded to any server.
Chart Maker Online
Turn rows of data into a chart you can read at a glance. Paste one Label, Value pair per line, then click Visualize to draw the chart - no upload and no account required. Sample data is prefilled (Mon to Fri with values), so a chart renders immediately on your first visit.
Accepted data formats
- Comma-separated or tab-separated rows, whichever format you paste.
- A single number per line also works - each bar is auto-labelled as Item 1, Item 2, and so on.
- Blank lines and non-numeric values are skipped gracefully.
Your data stays in the browser
Everything runs in the browser. Your data never leaves the tab, which makes this tool suitable for internal numbers, client figures, or any dataset you prefer not to send to a third-party service. Rendering is pure client-side SVG with no server call, so the page keeps working offline once it has loaded.
Chart Maker Online draws bar charts only, by design
Chart Maker Online draws one chart type: a bar chart. There is no pie, line, doughnut, or scatter option, and there is no chart-type selector in the tool. If your goal is a quick, labeled comparison of values, such as weekday totals, category counts, or survey tallies, a bar chart is usually the clearest choice anyway, so the single-type design keeps the page fast and the interface simple. If you need a different chart shape, for example a line chart to show a trend across many data points, or a pie chart to show proportions, a spreadsheet app or a dedicated charting library gives you that choice.
A useful guideline is dataset size, not just chart shape. A handful of rows, say the days of a week or the categories in a short survey, renders instantly and stays readable as a bar chart. Once a dataset grows past a few dozen rows, the bars get thin and the labels start to overlap, so at that point a spreadsheet's zoomable chart or a paginated table is easier to read than a single wide bar chart.
Uploading files and saving the chart
Chart Maker Online does not accept file uploads and does not include a button to export the chart as an image. You paste your data directly into the textarea; there is no upload control for a .csv, .xlsx, or .json file, and no drag-and-drop zone. If your numbers already live in a spreadsheet, copy the label and value columns you want and paste them in. To keep a copy once the bar chart renders, take a screenshot of it in your browser.
For converting or cleaning the underlying data before you chart it, see the related CSV to JSON Converter and the JSON Formatter.
How the tool reads your rows and draws each bar
Each time you press the Visualize button, the tool reads the textarea line by line: it splits each line on a comma or a tab, treats the first part as the label and the second as the number, and quietly drops any line that is blank or whose value is not numeric. A line that holds a single number with no label is still kept and auto-named in sequence, so a bare column of figures charts without any cleanup. Labels are escaped before they are placed into the chart, which means a stray angle bracket or ampersand in your text shows as plain characters instead of breaking the drawing. The chart is drawn as inline SVG rather than a bitmap image, so it stays crisp when you zoom the page, and because the whole parse-and-draw cycle happens in the tab, editing a value and clicking Visualize again re-reads the box from scratch rather than patching the previous chart.
Frequently Asked Questions
What does Chart Maker Online do?
Turn rows of data into a chart you can read at a glance.
Does Chart Maker Online support pie, line, or other chart types?
No - Chart Maker Online currently draws bar charts only. If you need a pie, line, or scatter chart, a spreadsheet app or a dedicated charting library is a better fit for now.
What complementary tools work well alongside chart maker online?
For exporting or converting the underlying data, see the related developer tools.
Can I upload a CSV or spreadsheet file instead of typing the data?
No - Chart Maker Online only reads what you paste into the data textarea. Copy the label and value columns from your spreadsheet or CSV and paste them in; there is no upload button.
Can I download the chart as an image?
Not from inside the tool - there is no export or download button. Take a screenshot of the rendered chart if you want to save a copy.
Does Chart Maker Online work without an internet connection?
Yes, once the page has loaded. Chart Maker Online renders the bar chart entirely in your browser with client-side SVG, so drawing the chart itself does not need a live connection - only loading the page the first time does.