Hello  @Hemant_Nehete,

For out of the box option to convert attachement control file into base64 you can try the following link: https://codepen.io/AshV/pen/pjodjV

Should you find the above information useful kindly mark as "Accepted Solution and/or Kudo", as this will assist other community members looking for related information.

Regards,
Beswick

rK2 will not accept any liability for any issues arising from actions taken in respect of the information provided by any forum member]

Hi,

Perhaps, the following community link might help.

https://community.k2.com/t5/K2-Blackpearl-Forum-Posts/K2-attachments/td-p/79886