pdf to epub

lonly · 06-26-2025, 03:38 PM

i am trying to convert pdf to epub file using calibre
first i tried calibre gui which is taking hours but cannot convert that pdf to epub then i use python script with calibre ebook-convert.exe and that is converting pdf to epub but missing a lot of setting i am sharing you screenshot of pdf text and converted epub same area.
check attached files (First image is original PDF and second image is converted epub and see text and diagram is broken in epub)

here is my script code

import subprocess
import os

# Path to your input PDF
pdf_path = r"C:\Users\samsam\Downloads\Analysis of Fork.pdf" # <-- Change 'mybook.pdf' to your actual file name

# Output EPUB path (same folder)
epub_path = os.path.splitext(pdf_path)[0] + ".epub"

# Full path to ebook-convert.exe
calibre_convert_exe = r"C:\Program Files\Calibre2\ebook-convert.exe"

# Command to run conversion
command = [
calibre_convert_exe,
pdf_path,
epub_path,
"--disable-font-rescaling",
"--no-default-epub-cover",
"--preserve-cover-aspect-ratio"

]

try:
subprocess.run(command, check=True)
print(f"✅ EPUB created: {epub_path}")
except subprocess.CalledProcessError as e:
print("❌ Conversion failed:", e)

theducks · 06-26-2025, 03:59 PM

Did you read this stickey (at the top of conversion)?
https://www.mobileread.com/forums/sh...d.php?t=118605

PDF is a page paste up format. The pieces can be in any order.
Convert only handle the simplest Top -> Bottom text decently.
Toss in images or

multi column : good luck

BetterRed · 06-26-2025, 06:52 PM

Looks like a professionally created PDF, I suggest you open the PDF in Word (or Acrobat) and save as DOCX, and then have calibre convert the DOCX to EPUB.

This is an instance of a two step conversion being better than one step.

BR

GevorgPirenyan · 09-05-2025, 04:45 AM

Hello, forum members. I've one question. I want to convert pdf book on Armenian language to epub, but after converting the armenian text becomes latin text and it is not readable. Is here anyone who known how to solve this problem?

My ebook is Kindle PaperWhite 11th Gen (PW5, 2021).

JSWolf · 09-05-2025, 05:24 AM

The solution is Don't do it. It won't work properly and the time to fix it is not worth it.

06-26-2025, 03:38 PM	#1
lonly Member Posts: 20 Karma: 10 Join Date: Nov 2012 Location: Bellow the Sky Device: Laptop	pdf to epub i am trying to convert pdf to epub file using calibre first i tried calibre gui which is taking hours but cannot convert that pdf to epub then i use python script with calibre ebook-convert.exe and that is converting pdf to epub but missing a lot of setting i am sharing you screenshot of pdf text and converted epub same area. check attached files (First image is original PDF and second image is converted epub and see text and diagram is broken in epub) here is my script code import subprocess import os # Path to your input PDF pdf_path = r"C:\Users\samsam\Downloads\Analysis of Fork.pdf" # <-- Change 'mybook.pdf' to your actual file name # Output EPUB path (same folder) epub_path = os.path.splitext(pdf_path)[0] + ".epub" # Full path to ebook-convert.exe calibre_convert_exe = r"C:\Program Files\Calibre2\ebook-convert.exe" # Command to run conversion command = [ calibre_convert_exe, pdf_path, epub_path, "--disable-font-rescaling", "--no-default-epub-cover", "--preserve-cover-aspect-ratio" ] try: subprocess.run(command, check=True) print(f"✅ EPUB created: {epub_path}") except subprocess.CalledProcessError as e: print("❌ Conversion failed:", e) Attached Thumbnails Last edited by lonly; 06-26-2025 at 03:56 PM.

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06-26-2025, 03:59 PM	#2
theducks Well trained by Cats Posts: 31,162 Karma: 60406498 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	Did you read this stickey (at the top of conversion)? https://www.mobileread.com/forums/sh...d.php?t=118605 PDF is a page paste up format. The pieces can be in any order. Convert only handle the simplest Top -> Bottom text decently. Toss in images or multi column : good luck

06-26-2025, 06:52 PM	#3
BetterRed null operator (he/him) Posts: 21,881 Karma: 30277270 Join Date: Mar 2012 Location: Sydney Australia Device: none	Looks like a professionally created PDF, I suggest you open the PDF in Word (or Acrobat) and save as DOCX, and then have calibre convert the DOCX to EPUB. This is an instance of a two step conversion being better than one step. BR

09-05-2025, 04:45 AM	#4
GevorgPirenyan Junior Member Posts: 1 Karma: 10 Join Date: Sep 2025 Device: Amazon Kindle Paperwhite 11th Gen (PW5, 2021)	Hello, forum members. I've one question. I want to convert pdf book on Armenian language to epub, but after converting the armenian text becomes latin text and it is not readable. Is here anyone who known how to solve this problem? My ebook is Kindle PaperWhite 11th Gen (PW5, 2021).

09-05-2025, 05:24 AM	#5
JSWolf Resident Curmudgeon Posts: 80,190 Karma: 148951761 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	The solution is Don't do it. It won't work properly and the time to fix it is not worth it.