Histogram Builder
Paste one column of raw numbers. FastChart bins them automatically using Sturges’ rule, and you can override the bin count with a single slider.
Chart type
Your data20 rows · 1 cols
Single column detected
Live previewUpdates as you type · nothing leaves your browser
Export
Features
What the histogram builder gives you
- Paste CSV, Excel cells, TSV, JSON or a Markdown table
- Live preview — every edit renders instantly, no Generate button
- Export 2x PNG, vector SVG, PDF or copy the image
- Transparent background and five business colour palettes
- No signup, no watermark, nothing uploaded to a server
Use cases
When to use a histogram
- Show the distribution of test scores or grades
- Analyse salary, age or response-time spread
- Check whether a measurement is normally distributed
FAQ
Histogram Builder questions
- What is the difference between a histogram and a bar chart?
- A bar chart compares separate categories, so the bars have gaps. A histogram shows how a single numeric variable is distributed across continuous intervals, so the bars are adjacent and the x-axis is a number line.
- How does the histogram builder choose bin width?
- It applies Sturges’ rule — bins = ceil(log2(n) + 1) — to your dataset, then you can raise or lower the bin count manually to see finer or coarser detail.
- How much data can I paste?
- Thousands of rows render fine because everything is computed in your browser. Your data is never uploaded to a server.
Related
Try another chart type
Import formats
Paste from anything
- CSV to ChartPaste raw CSV text or drop a .csv file. Delimiters, quoted fields and header rows are detected automatically.
- Excel to ChartSelect cells in Excel, press Ctrl+C, then paste here. Copied spreadsheet cells arrive as tab-separated values, which FastChart reads natively.
- JSON to ChartPaste an array of objects, an array of numbers, or a flat key–value object. Keys become series and values become data points.
- Markdown Table to ChartGreat for tables produced by ChatGPT, GitHub READMEs or Notion. Pipes and the separator row are handled for you.
- TSV to ChartTab-separated values are what your clipboard holds after copying from a spreadsheet or a database client. Paste them straight in.
- Google Sheets to ChartGoogle Sheets charts are hard to style and hard to export cleanly. Copy the range instead and get an export-ready chart here.