Rotating PDF Pages Using Python

This topic describes how to update or change the page orientation of pages in an existing PDF file programmatically with Python.

Change Page Orientation

This function rotates every page of a PDF document 90 degrees clockwise using Aspose.PDF for Python. It is useful for correcting page orientation issues, such as scanned documents that are sideways. The original PDF remains unchanged, and the rotated version is saved as a new file.

import os
import aspose.pdf as ap

# Global configuration
DATA_DIR = "your path here"

def rotate_page(infile, outfile):
    """
    Rotate all pages in a PDF document by 90 degrees clockwise.

    Demonstrates how to rotate PDF pages using the Aspose.PDF library.
    This function applies a 90-degree clockwise rotation to every page
    in the input document and saves the result to a new file.

    Args:
        infile (str): Path to the input PDF file to rotate.
        outfile (str): Path where the rotated PDF will be saved.

    Returns:
        None: The function modifies the PDF pages and saves to the output path.

    Note:
        - Applies 90-degree clockwise rotation (ap.Rotation.ON90) to all pages
        - Rotates every page in the document uniformly
        - The original document is not modified; a new file is created
        - Rotation options include: ON90 (90°), ON180 (180°), ON270 (270°)
        - Useful for correcting page orientation or adjusting layout

    Example:
        >>> rotate_page("input.pdf", "rotated_output.pdf")
        # Rotates all pages 90 degrees clockwise and saves to rotated_output.pdf
    """
    document = ap.Document(infile)
    for page in document.pages:
        page.rotate = ap.Rotation.ON90

    document.save(outfile)