How to Convert a CSV File to a PNG Image

Sheetize provides a simple, high‑performance API that lets you turn a CSV (comma‑separated values) file (.csv) into a high‑quality PNG picture. This is ideal for visualising tabular data, creating thumbnails, embedding spreadsheets in web pages, or generating reports without exposing the raw data.

Why Use Sheetize for CSV‑to‑PNG Conversion?

  • Full fidelity – preserves cell text, delimiters and any embedded Unicode characters.
  • Fast & scalable – optimised for .NET, works on Windows, macOS and Linux.
  • Customisable resolution – set horizontal and vertical DPI to match your needs.
  • Zero‑dependency – no external tools or Office installations required.

Getting Started

Add the Sheetize.ImageConverter package to your .NET project (via NuGet) and call the ImageConverter.Process method.

Sample C# Code 

using Sheetise;

var loadOptions = new LoadOptions
{
    // Path to the source CSV file
    InputFile = @"D:\Data\SalesReport.csv"
};

var saveOptions = new ImageSaveOptions
{
    // Desired output file – PNG extension selects the PNG format
    OutputFile = @"D:\Data\SalesReport.png",

    // Optional: control image resolution (DPI)
    HorizontalResolution = 150,
    VerticalResolution = 150
};

ImageConverter.Process(loadOptions, saveOptions);

The snippet loads SalesReport.csv and writes SalesReport.png using the specified resolution.

Key Options for PNG Output

  • HorizontalResolution / VerticalResolution – define the DPI; higher values produce clearer images at the cost of a larger file size.
  • Transparency – PNG supports an alpha channel; you can configure the background colour if needed (via additional API settings).

Best Practices

  1. Use at least 150 DPI for printable graphics; 72 DPI is sufficient for web thumbnails.
  2. If the CSV contains many columns, increase the DPI or adjust cell width to avoid cramped text.
  3. Open the generated PNG in an image viewer to verify its appearance before distribution.
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