Remove whitespaces, newlines and tabs in json not in json descriptions

I have a json file:

{
  "parameters": [
    {
      "productGroup": "-1",
      "proofIncome": "-1",
      "docSignType": "-1",
      "creditSumm": "StatusConfirmAmount",
      "message": "Abbreviated verification parameters"
    },
    {
      "productGroup": "-1",
      "proofIncome": "-1",
      "docSignType": "-1",
      "creditSumm": "AdditionalDocumentAmount",
      "message": "Abbreviated validation parameters.rnrn You need to check the 2nd documentrn 1 page of the contract is enough"
    }
  ]
}

How can I remove whitespaces, newlines and tabs in json, but not in json "message": descriptions like json formatter – minify/compact:

using Powershell or Python?

Answer

PowerShell’s ConvertTo-Json cmdlet has a -Compress parameter for this:

@'
{
  "parameters": [
    {
      "productGroup": "-1",
      "proofIncome": "-1",
      "docSignType": "-1",
      "creditSumm": "StatusConfirmAmount",
      "message": "Abbreviated verification parameters"
    },
    {
      "productGroup": "-1",
      "proofIncome": "-1",
      "docSignType": "-1",
      "creditSumm": "AdditionalDocumentAmount",
      "message": "Abbreviated validation parameters.rnrn You need to check the 2nd documentrn 1 page of the contract is enough"
    }
  ]
}
'@ |ConvertFrom-Json |ConvertTo-Json -Compress

Result:

{"parameters":[{"productGroup":"-1","proofIncome":"-1","docSignType":"-1","creditSumm":"StatusConfirmAmount","message":"Abbreviated verification parameters"},{"productGroup":"-1","proofIncome":"-1","docSignType":"-1","creditSumm":"AdditionalDocumentAmount","message":"Abbreviated validation parameters.rnrn You need to check the 2nd documentrn 1 page of the contract is enough"}]}

---

In python you can minify the json by specifying custom separators when calling json.dumps():

import json

data = """
{
  "parameters": [
    {
      "productGroup": "-1",
      "proofIncome": "-1",
      "docSignType": "-1",
      "creditSumm": "StatusConfirmAmount",
      "message": "Abbreviated verification parameters"
    },
    {
      "productGroup": "-1",
      "proofIncome": "-1",
      "docSignType": "-1",
      "creditSumm": "AdditionalDocumentAmount",
      "message": "Abbreviated validation parameters.\r\n\r\n You need to check the 2nd document\r\n 1 page of the contract is enough"
    }
  ]
}
"""

minified = json.dumps(json.loads(data), separators=(',', ':'))

print(minified)

Result:

{"parameters":[{"productGroup":"-1","proofIncome":"-1","docSignType":"-1","creditSumm":"StatusConfirmAmount","message":"Abbreviated verification parameters"},{"productGroup":"-1","proofIncome":"-1","docSignType":"-1","creditSumm":"AdditionalDocumentAmount","message":"Abbreviated validation parameters.rnrn You need to check the 2nd documentrn 1 page of the contract is enough"}]}