I have a paper texture and it is not the best when used inside Blender. A couple of months back, I found a website where we can upload the texture image and then download the PBR generated from it. Sadly, I am not able to locate it now. If there is any safe and reliable source for image to PBR, kindly share. Thanks.
There’s already a thread about this topic on blenderartists. Have a look here:
Use Materialize program.
But don’t forget, automatic PBR creation results usually is not correct. For good and correct result you must create and measure all maps manually.
I think I found the online tool
Really appreciate the comments, I will try them. Thanks.