Honest note: this reads the text straight out of your PDF and rebuilds it as
an EPUB, right here in your browser — your file is never sent anywhere.
It works best on plain text PDFs (a manuscript, a book, a report). It does not
do OCR, so a scanned PDF (a photo of a page, no selectable text) will come out
empty or garbled — if you can't highlight text in the PDF normally, this tool can't
read it either. Chapter headings are detected automatically where the PDF has clear
"Chapter" markers; if none are found, the whole book comes out as one chapter, which
still opens and reads fine.