How to merge PDFs without uploading them
The documents people most often need to combine — a signed contract and its annexes, three months of bank statements, a passport scan and a visa form — are exactly the ones that should not be uploaded to a website just to be stapled together. Here is every practical way to merge PDFs while keeping them on your own device.
In any browser, on any computer
ShyPDF’s Merge PDF does the work inside the browser tab. Choose your files, drag the cards into order, and click “Merge PDF”; the combined file is saved to your downloads folder. The PDFs are read into your device’s memory and joined there — they are never sent to a server. It works the same on Windows, macOS, Linux and Chromebooks, and there is nothing to install or sign up for.
Do not take “never sent to a server” on trust, from us or anyone else. This guide shows how to check it yourself in about thirty seconds.
On a Mac: Preview
- Open the first PDF in Preview and choose View → Thumbnails.
- Drag the second PDF’s file icon from Finder into the thumbnail sidebar, dropping it where you want its pages to go.
- Reorder pages by dragging thumbnails, then File → Export as PDF… to save a new file.
It is built in and entirely offline. The catch is that it is easy to drop the pages inside the wrong spot or to overwrite the original by saving instead of exporting, so work on a copy.
On an iPhone or iPad: the Files app
- Put the PDFs in the same folder in Files and make sure their names sort in the order you want.
- Tap Select, tick the files, then tap the ⋯ menu and choose Create PDF.
Files are combined in the order they are listed, normally by name, so rename them first (1-cover, 2-form, 3-annex) if the order matters.
On Windows and Chromebooks
Neither has a built-in way to merge PDFs. “Microsoft Print to PDF” can turn one document into a PDF, but it cannot join several. Your realistic options are a browser-based tool that works locally, as above, or installing a desktop application such as the open-source PDFsam Basic.
Things that go wrong
- One of the files asks for a password. Encrypted PDFs cannot be merged as they are. If it is your document and you know the password, save an unlocked copy first.
- You only need some pages. Extract them first, or merge everything and then delete the extra pages by looking at the thumbnails.
- The result is too large to send. Merging never shrinks anything. Run the merged file through Compress PDF, or see how to make a PDF small enough to email.
- Pages are sideways. Common with scans. Rotate them permanently rather than just turning the view in your reader.