The files are deleted immediately after processing I'm considering implementing WebAssembly (Wasm) to do most of the work on the client's device and enable offline use
You say that here, but its not in the privacy policy as far as I can see.
When you get to the stage of monetizing the site, I expect the most obvious starting point is monetizing the information inside the pdfs.
Then there's the obscurity of how much (if any) is passed on to other services (like google). You may have one policy about the PDFs, they may gave another.
So yeah, I'm in the "not for general use" camp myself. (Although there are edge cases where it may be useful.)
Don't get me wrong, I can see the upsides, and your web site looks professional, but alas the downsides are too significant to overcome the inconvenience of searching out something local.
Only last week there was a HN thread about how the author said they just used chatgpt to make the entire thing and as a result the code is beyond bad. I don't think I'd trust it.
They didn't say that. They said they wrote the first version in a few days, using ChatGPT. Then worked on it almost another year since then. Something of that nature. Pretty big difference.