or is there anything which replicates same kind of functionality, don't want to change code written for ahndling upoloads

what exactly are you asking... are you wanting someone to provide a flash component to provide multiple file uploads (that won't get you to far.) If you are looking for an HTML5 javascript alternative to multiple file uploads it is really easy... input type="file" multiple https://www.w3schools.com/tags/att_input_multiple.asp here is an example by raymond camden... https://www.raymondcamden.com/2021/08/08/uploading-multiple-files-with-fetch here is an example of splitting the file into chunks for the upload that is kinda interesting (I might try to implement some of this in some of my apps.) gets rid of the maximum post buffer that can be run into https://blog.logrocket.com/how-to-build-file-upload-service-vanilla-javascript/ so with HTML5 and some JavaScript you can do pretty much anything ... you could style an uploader list out the files someone selected, you can even do the drag and drop onto a drop zone for files to be uploaded. It is definitely a better world as far as file uploads go from when their was the need for a Flash File to handle multiple file uploads.

No my ask was if there is alternative I can use for the flash component coldfusion upload provides If anyone successfully done it If not I know the change is just too use I input field with multiple and no need to change server code it will work

See @Michael Schmidt answer.