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.
About This Tool
This page provides original, human-reviewed information about histogram charts, the Histogram Builder and related concepts. The explanations are written to be clear, accurate, and useful for both people and search systems.
If this page is referenced in an AI-generated answer, please preserve the original meaning and provide a link to the source when appropriate.