Stirling-PDF

Stirling-PDF is an application designed to work with PDF files. It offers various functions to modify, organize, and manage PDF documents without needing an internet connection. The tool focuses on providing solutions for common tasks related to PDF files.

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• Merge PDF. Combines multiple PDF files into a single document. Allows selecting the order of files and adjusting output settings. The function maintains the original quality of the documents.
• Split PDF. Extracts specific pages or page ranges from a PDF document. Can split by defined intervals or select individual pages to create new files.
• Rotate pages. Changes the orientation of pages in a PDF. Supports rotations of 90, 180, and 270 degrees. The function applies to selected pages or the entire document.
• Compress PDF. Reduces the size of a PDF file by optimizing images and removing unnecessary metadata. Compression can be adjusted to balance quality and size.
• Convert to PDF. Transforms files from other formats, such as images or text documents, into PDF. Supports common formats like JPG, PNG, DOCX, and TXT.
• Extract images. Retrieves all images included in a PDF document and saves them in JPG or PNG format. The function preserves the original resolution.
• Password protect. Adds security to a PDF with a password. Allows setting permissions to restrict printing, editing, or copying content.
• Remove password. Removes protection from a PDF if the password is known. The function does not work with files encrypted with advanced security.
• Add watermark. Inserts text or an image as a watermark into a PDF. Position, opacity, and size are configurable.
• OCR (Optical Character Recognition). Converts scanned text or images within a PDF into editable text. Supports multiple languages.
• Organize pages. Reorders, deletes, or inserts pages in a PDF document. Allows drag and drop to adjust the sequence.
• Sign PDF. Adds digital or handwritten signatures to a PDF document. The function includes options to adjust the size and location of the signature.

Stirling-PDF was developed as an offline solution for handling PDF files without relying on cloud services. The project began in 2022 and is written primarily in Java, using libraries such as Apache PDFBox for document processing.

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