Convert bson file to json with javascript

Convert bson file to json with javascript

How to convert bson file to json with javascript with a simple script file. Followup this simple proces

Save the following file into index.js

const fs = require('fs')
const BSON = require('bson')

function BSON2JSON (from) {
  const buffer = fs.readFileSync(from)
  let index = 0
  const documents = []
  while (buffer.length > index) {
    index = BSON.deserializeStream(buffer, index, 1, documents, documents.length)

  return documents

const bsonFilePath = 'file.bson'
const bson2json = BSON2JSON(bsonFilePath)
console.log('🚀 ~ file: bson2json:', bson2json)

If you want tot export the bson to a json file add at the end of the file this line of code:

fs.writeFileSync('file.json', JSON.stringify(bson2json))


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