Aren't there free websites available for that?

Yes, I can help you if you still need any help.

Ask chat gpt

Yes i'll do that ..
But i'll charge for that ..

Kia scenes krny hain bta dain

Try scribbr

Check Facebook freelancing pages or buy subscription by facebook subscription pages, you can get subscription for very cheap price

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Ideally ask your university professor or anyone there, they should provide you if the document is required by the university (eg: your Fyp)

Google kr len dher lga hua

Yes definitely
1.Duplicatechecker
2.Smallseotools
I have used these two websites for plagiarism checking