Gios PDF Splitter and Merger is a lightweight, portable, and completely free utility designed to handle common PDF (portable document file) management tasks with speed and simplicity. It allows users to split large PDF files into smaller documents, merge multiple PDFs into a single file, and convert JPG images into PDF format. Because it runs without installation, this tool is especially useful for USB flash drives and portable software collections.
This small but capable application is well suited for students, office workers, and home users who need to manage PDF files without installing bulky commercial software. According to its developer, this PDF Splitter and PDF Merger was among the earliest open source freeware tools to offer PDF splitting and merging functionality on Windows.
Gios PDF Splitter and Merger | Free and Portable

This portable PDF utility focuses on efficiency and ease of use. The interface is straightforward, allowing users to quickly choose files, define page ranges, and generate new documents in just a few clicks. In addition to working with existing PDF files, it supports converting scanned JPG images into PDFs, making it a practical choice for digitizing paper documents.
Despite its small size, it delivers reliable performance for everyday document handling tasks. It is ideal for users who want a fast solution without advanced editing features or unnecessary complexity.
Key Features
- Split PDF Files: Acts as a PDF Splitter which can be used to extract individual pages or defined page ranges from a PDF document.
- Merge PDF Files: Like Ultra PDF merger it also acts as a PDF merger that can be used to combine multiple PDF files into a single, unified document.
- JPG to PDF Conversion: Convert scanned JPEG images into PDF format for archiving or sharing.
- Portable Application: No installation required, making it perfect for USB flash drives.
- Lightweight: Approximately 148 KB in size, ensuring fast startup and minimal resource usage.
- Free and Open Source: Distributed as freeware with open source availability.
System Requirements
- Operating System: Windows XP through Windows 10. Works on Windows 11 with .NET 2.0 enabled.
- Framework Requirement: Microsoft .NET Framework 2.0
Specifications | Project Page | Download
- Developer: Paolo
- Extracted Size: 148 KB
- License: Freeware | Open Source
- Rating: 4 Stars
- Archived Website: Project Page (Archived)
- Download: Download Gios PDF Splitter and Merger
Final Take on this PDF Splitter/PDF Merger
Gios PDF Splitter and Merger remains a solid choice for users who need a fast and no nonsense way to manage PDF documents. It handles splitting, merging, and basic image to PDF conversion with minimal overhead and zero cost. Thanks to its portability and extremely small footprint, it fits perfectly into a USB based toolkit or emergency document workflow. Even years after its original release, this utility continues to be a practical solution for simple PDF file management tasks.