PDF Merge Tool

Combine two or more PDF files into a single PDF, in order. Files are processed in your browser and never uploaded.

When should you use this?

Use this when you need to combine several separate PDFs (scanned invoices, report sections) into one file, especially when an institution asks for a single document instead of several.

When shouldn't you use this?

Settle on the page order before merging; reordering pages afterward is a separate step. Also, if one of the files is password-protected, you'll need to remove that first.

Step-by-step

Click the PDF files (at least 2) field and pick the files you want to combine. You need at least two PDFs for a merge.
Prepare the files in the order you want them to appear. Adding a number to the start of each file name, like 01, 02, 03, makes the order easy to keep track of.
Click Merge and download. The files are processed in your browser and are not uploaded to a server.
Open the downloaded PDF and check the page order. The total page count should match the sum of the page counts of your source files.

Example

Say a scholarship portal wants your ID copy, a student certificate and your transcript as a single PDF. You have three separate scans of 2, 1 and 4 pages. Name them 01-id, 02-student-certificate and 03-transcript, merge them in that order, and you get one 7-page file ready to upload. If the portal caps the upload size, scanning at a sensible resolution from the start saves you a round of fixing later.

Merging PDFs

PDF merging collects several files into one document in the order you choose. It is used to send report attachments, scanned pages or application documents as a single file. Files are processed in your browser.

When merging

Arrange the files in the right order before adding them.
Password-protected PDFs must have the password removed first.
If page sizes differ the result can contain pages of mixed sizes.
Check that the merged file does not exceed the sending size limit.

Things to keep in mind

The merged file is roughly as large as all the source files put together. If your email provider limits attachment size, check the file size before you hit send.
If some scans are sideways, rotate that file before merging. The rotate tool applies one angle to every page, so fixing a single section after merging is harder.
Bookmarks and fillable form fields from the source files may not carry over cleanly. Open the result and test them rather than assuming they work.
Keep the original files for a while. If you notice a missing or misplaced page later, you will need them to merge again.

Frequently asked questions

Are my files uploaded to a server?

No. This tool runs entirely in your browser; your PDF file is never sent to a server.

Is there a file size limit?

There's no fixed limit, but very large files may process more slowly depending on your browser's available memory.

Does this work on password-protected PDFs?

No — password-protected PDFs can't be opened, so you'll need to remove the password first.