PDF Merge

About this tool

PDF (Portable Document Format) is a document-sharing format developed by Adobe in 1993. PDF files preserve formatting regardless of the operating system, fonts, or software - the document looks the same on every device. Merging PDFs is a common requirement: contracts with appendices, presentations with supporting materials, invoices with receipts, or annual reports compiled from multiple sources. The PDF Merge tool combines any number of PDF files into a single document in the order you choose by dragging them. All processing happens directly in the browser with the pdf-lib library - no file is sent to the server and all data stays on your device.

How to use

1. 1Drag PDF files into the upload area or click to select them from your file system.
2. 2Arrange the files in the required order by dragging them or using the up/down arrows.
3. 3Click Merge PDF - processing runs in the browser without sending data to the server.
4. 4Wait for completion - larger files may take a few seconds to process.
5. 5Click Download PDF and save the merged file to your device.

Specifications and limits

Input: PDF files, max 100 MB per file. Output: one merged PDF file. Number of files: unlimited. Page order: adjustable by drag and drop or arrow buttons. Preserves content, formatting, images, and embedded fonts. Browser-based processing via pdf-lib - data is not sent to the server.