Merge PDF

Merging PDF means gathering two or more documents into one file, in the sequence you decide. It solves an everyday need: delivering everything as a single attachment — contracts with addenda, proposals with appendices, receipts for a claim, chapters of a paper, or a month of invoices. Instead of emailing five loose files, you send one tidy, easy-to-print document.

Here the merge happens entirely in your browser. The PDFs are never uploaded to any server, so documents with sensitive data — IDs, contracts, medical reports — never leave your computer or phone. That is the difference between a convenience tool and a leak risk.

The order files appear in the list is exactly the order pages end up in the final PDF. So before processing, drag items into place: the first in the list opens the document, the last closes it. If you merge a contract and then an appendix, keep the contract on top.

An organizing tip: rename files with a leading number (01-contract, 02-appendix, 03-receipt) before dragging them in. They will line up in the right sequence and save you a redo.

Unlike compressing or converting, merging PDFs is a lossless operation: the original pages are copied byte for byte into the new file. Text stays selectable, images keep their resolution, and forms remain fillable. The final size is roughly the sum of the originals.

If the result is too heavy to email, the next step is to run compress PDF to shrink it before sending.

PDFs with an open password must be unlocked before they can be merged — the encryption stops the tool from reading the pages. If one of your files is protected, open it in your reader with the password, use "print to PDF" (or "save as PDF") to create an unprotected copy, and merge that copy. Files with only a permissions password (which lock editing but open normally) usually work directly.