Painful process to get something supposed to be free
The headline on Google Search says "PDF compressor: Compress PDFs online for free."
It was easy to begin the process...
... but to receive the result, I had to log in -- only to find that "the shared document has been deleted." And further, I had to start the trial, which means giving my credit card information, and more.
So, technically speaking, it may be "free." But what a headache! Forget it.