Convert EPUB to PDF in Python

To convert EPUB to PDF in Python, open the EPUB file as a binary stream, create PdfSaveOptions, and call Converter.convert_epub() with the stream, options, and output PDF path.

EPUB publications commonly use reflowable HTML and CSS so that reading applications can adapt content to the screen and reader settings. PDF uses fixed pages instead. EPUB-to-PDF conversion is useful when a publication needs stable page dimensions for printing, sharing, archiving, or document workflows.

Convert EPUB to PDF in Python

The basic workflow uses default PDF save settings:

1. Open the source EPUB file as a binary stream.
2. Create a PdfSaveOptions object.
3. Pass the stream, options, and output path to Converter.convert_epub().

import aspose.html.converters as conv
import aspose.html.saving as sav

# Open the source EPUB file
with open("input.epub", "rb") as stream:
    # Convert EPUB to PDF with default settings
    conv.Converter.convert_epub(stream, sav.PdfSaveOptions(), "output.pdf")

The with statement closes the input stream after conversion. Replace the source and output paths with locations used by your application.

Customize EPUB to PDF with PdfSaveOptions

Use PdfSaveOptions when the PDF requires a specific page size, margins, background, CSS media type, metadata, image-compression setting, or encryption. Configure only the options required by the output.

The following example sets the output directory, page dimensions, margins, and page background before converting EPUB to PDF:

import os
import aspose.html.converters as conv
import aspose.html.drawing as dr
import aspose.html.saving as sav
import aspose.pydrawing as pd

input_dir = "data"
output_dir = "output"
os.makedirs(output_dir, exist_ok=True)

input_path = os.path.join(input_dir, "input.epub")
output_path = os.path.join(output_dir, "epub-options.pdf")

options = sav.PdfSaveOptions()
options.page_setup.any_page = dr.Page(
    dr.Size(800, 600),
    dr.Margin(20, 20, 20, 20)
)
options.background_color = pd.Color.bisque

with open(input_path, "rb") as stream:
    conv.Converter.convert_epub(stream, options, output_path)

The numeric page and margin values are measured in pixels. The example does not assign a CSS media type because PdfSaveOptions uses print media by default. To apply screen-specific EPUB styles instead, import aspose.html.rendering as ren and set options.css.media_type = ren.MediaType.SCREEN.

The most useful PdfSaveOptions properties for EPUB conversion are:

Property	Use it to control
page_setup	PDF page size, margins, and page layout.
css	CSS processing, including the media type used for media queries.
background_color	The color that fills each PDF page. The default is transparent.
jpeg_quality	JPEG compression quality when JPEG compression is used. It does not increase source-image resolution.
document_info	PDF metadata such as title, author, subject, and keywords.
encryption	PDF passwords, permissions, and encryption settings.

Why PDF Page Breaks Can Differ from an EPUB Reader

Most EPUB publications are reflowable. An EPUB reader lays out the content according to its viewport, font settings, and reader preferences, so its visible “pages” are not fixed in the source publication. PDF uses fixed page dimensions. During conversion, pagination therefore depends on page_setup, margins, available content width, CSS print rules, font metrics, and the resources available in the conversion environment.

Different page breaks are expected and do not necessarily indicate lost content. Choose an appropriate PDF page size, make the required fonts available, and review EPUB styles that contain fixed widths, forced page breaks, or media-specific rules.

Common EPUB to PDF Issues

Issue	Likely cause and solution
Text uses a different font	The font referenced by the EPUB is not embedded or available in the conversion environment. Make the required font available and check whether the EPUB contains a valid font resource.
Images or styles are missing	A packaged resource path is invalid, the resource is absent from the EPUB archive, or an external resource cannot be accessed. Validate the EPUB package and its resource references.
Content is clipped or pages are too small	The selected page dimensions or margins do not fit the content. Increase the page size, reduce the margins, or revise fixed-width EPUB styles.
The PDF has more pages than expected	Reflowable content is being laid out on fixed PDF pages. Page size, margins, font substitution, and CSS page-break rules can all change the page count.
The output contains multiple pages	This is normal for book-length EPUB content. convert_epub() creates one PDF document containing the rendered pages.

Related EPUB Conversion Guides

• EPUB Converter – choose another EPUB output format.
• Convert EPUB to DOCX – create an editable Word document from EPUB content.
• Convert EPUB to JPG – render EPUB pages as JPEG images.
• Convert EPUB to PNG – render EPUB pages as lossless PNG images.
• Fine-Tuning Converters – review rendering options, devices, and advanced conversion controls.

Other Platforms

• Convert EPUB to PDF in .NET
• Convert EPUB to PDF in Java

FAQ

Can I convert EPUB to PDF for free?

You can evaluate Aspose.HTML for Python via .NET without a license, but evaluation output has limitations such as a watermark and processing limits. Request a free temporary license for unrestricted testing, or use the free online EPUB to PDF Converter for an occasional manual conversion. See Licensing for license setup.

Why can the PDF look different from a reflowable EPUB?

A reflowable EPUB adapts to the reader window and user settings, while PDF fixes content on pages of defined dimensions. Page size, margins, fonts, CSS media rules, and fixed-width elements can therefore change line wrapping and page breaks in the PDF.

Try Online EPUB to PDF Conversion

Use the free online EPUB to PDF Converter for quick manual conversion without writing code. Use Aspose.HTML for Python via .NET when EPUB-to-PDF conversion must run programmatically in an application, service, or batch workflow.

Download complete examples and data files from GitHub.