Image to XLSX Converter

A lightweight browser library for converting JPG and PNG images into XLSX (Excel) files.

It takes an image in Base64-encoded format, resizes it, and creates an Excel file with a spreadsheet containing the image as styled cells.

Features

• Convert JPG and PNG images to XLSX
• Customize cell size and resolution
• Works entirely in the browser (no server required)
• Supports automatic file download

Installation

npm i --save image-to-xlsx

Example

import imageToXlsx from 'image-to-xlsx'

# Read a file from the input

const readFile = fileList => {
  return new Promise((resolve, reject) => {
    const reader = new FileReader()
    reader.onload = () => { resolve(reader.result) }
    reader.onerror = (error) => { reject(error) }
    reader.readAsDataURL(fileList[0])    
  })
}

const start = async () => {
  const fileList = document.querySelector("input[type=file]").files
  const file = await readFile(fileList)
  imageToXlsx({ image: file })
}

Parameters

The imageToXlsx function returns an Excel file as a BLOB and supports the following options

• image - [string] Base64-encoded image (JPG or PNG)
• maxSize - [integer] Maximum number of cells used for rendering the image
• pixelSize - [integer] Approximate pixel size per cell
• cellWidth - [decimal] Custom cell width (overrides pixelSize)
• cellHeight - [decimal] Custom cell height (overrides pixelSize)
• download - [boolean] Whether the file should be automatically downloaded

Note. cellWidth and cellHeight must be set together to override pixelSize.

Demo

Check out a live demo here:

https://image-to-xlsx.web.app/

Why?

This library was created just for fun!