Storing json value in multiline text column

[Chanakya Jayabalan]

Is there any disadvantages in storing json string in a multiline text in SharePoint lists? Any restrictions we need to consider?

[#2]

I guess your only restriction is the maximum length of the text you can store in multi-line text field. A Multiple lines of text column in SharePoint Online can store up to 63,999 characters:

https://support.office.com/en-us/article/list-and-library-column-types-and-options-0d8ddb7b-7dc7-414...

For SharePoint on-premises different limits apply:

https://technet.microsoft.com/en-us/library/cc262787(v=office.16).aspx