PDF Partitioner

Splits large PDFs into smaller parts — built for Citrix-hosted document systems that freeze or reject oversized uploads.

Each part is capped at a configurable size (default 60 KB). No installation required to use the app.

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Quick Start — pdf_splitter.exe

Double-click pdf_splitter.exe to launch the interface. No Python, no command line, no setup.

Field	What to do
PDF File	Click Browse... and select the PDF to split
Output Folder	Click Browse... to choose where parts are saved (defaults to a _chunks folder next to the source file)
Max Size (KB)	Size cap per part in kilobytes — set to 60 to match the Citrix limit

Click Split PDF and wait for the progress bar to complete. The output folder will contain numbered parts ready to upload.

Output naming: <original_name>_part_001.pdf, _part_002.pdf, … in page order.

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How It Works

1. Estimates a starting pages-per-chunk from the file's size-to-page ratio
2. Writes each chunk and measures its file size
3. Any chunk over the limit is deleted and recursively halved until it fits
4. Single pages that still exceed the limit (e.g. high-res scans) are kept as-is — they cannot be split further

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Command-Line Usage

Prefer the terminal? Both the exe and the raw script accept arguments.

Executable

"pdf_splitter.exe" input.pdf
"pdf_splitter.exe" input.pdf --output-dir C:\path\to\output

Python script

python PDFpart.py input.pdf
python PDFpart.py input.pdf --output-dir ./chunks

Arguments

Argument	Required	Description
input_pdf	Yes	Path to the PDF to split
--output-dir	No	Output folder (default: <filename>_chunks/ next to source)

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Running from Source

Requires Python 3.10+

1. Install the dependency

pip install pypdf

2. Run

python PDFpart.py input.pdf

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Building the Executable

Produces a single standalone pdf_splitter.exe with no external dependencies.

1. Install build tools

pip install pyinstaller pypdf

2. Build

pyinstaller --onefile --windowed --name "pdf_splitter" PDFpart.py

Flag	Effect
--onefile	Bundles everything into a single .exe
--windowed	Suppresses the console window when the GUI runs

3. Collect the output

The finished executable is at dist\pdf_splitter.exe. Copy it anywhere — no other files needed.