Merge PDF — Free Online Tool

Merge PDF combines multiple PDF files into a single document entirely in your browser using pdf-lib, with a drag-and-drop list that lets you set the exact page order before merging — useful when the files were scanned or exported out of sequence. There's no hard limit on how many files you can combine; very large batches just take proportionally longer since everything processes on your device rather than a server.

This is the tool for turning a folder of separate PDFs — a signed contract, an ID scan, and a cover letter, for example — into one file a portal or email recipient can open as a single document, or for assembling several invoices and receipts into one submission for expense reporting. Merging preserves each source file's pages as-is; it doesn't remove or reorder individual pages within a file, so if you need to drop a specific page after merging, our Split PDF tool can extract the ranges you want to keep.

Because the merge happens client-side, none of the source documents are uploaded anywhere during the process — the combined file is generated locally and offered to you as a direct download.

Our Merge PDF is completely free to use with no signup required. For this tool, processing runs in your browser — your files and data stay on your device and are not uploaded to our servers.

Whether you are a developer, designer, student, or business owner, this tool is designed to save you time and make your workflow more efficient. Bookmark this page to access it whenever you need it — it will always be free.