How to use it
- Click Choose files or drop your PDF files on the box. You can add more later with Add files.
- Use the arrows to put the files in the order you want. The first file in the list comes first in the result.
- To take only some pages of a file, type them in its Pages box: 1-3, 5 takes pages 1, 2, 3 and 5; 8- takes page 8 to the end. Leave it empty to take every page.
- Click Merge PDFs, then Download to save the new file.
Your files stay on your device
Most online PDF tools upload your files to their server, merge them there and send the result back. This one does the work inside your browser, with the open-source pdf-lib library. The files are read from your disk, joined in memory and saved straight back to your disk.
That makes it safe for contracts, bank statements, medical letters and anything else you would not hand to a stranger. It also works for files too large to upload quickly, as long as your device has the memory.
What is kept and what is not
Every page is copied as it is: text stays selectable and searchable, images keep their quality and the page sizes do not change. Pages of different sizes, such as A4 and Letter, can be mixed in one file.
- Kept: text, images, vector drawings, page size and rotation, and links to websites.
- Not kept: the bookmark panel (outline) of the original files, and links that jump to another page inside a document.
- Fillable form fields may stop working in the merged file. Fill and save the forms first, then merge.
- Encrypted or password-protected PDFs cannot be merged here. Print such a file to a new PDF first, if you are allowed to.
Taking only some pages
Each file has a Pages box. Type page numbers separated by commas, and ranges with a dash. The pages are taken in the order you write them, so you can also reorder pages or repeat one.
| You type | Pages taken |
|---|---|
| (empty) | Every page |
| 1-3, 5 | 1, 2, 3, 5 |
| 8- | From 8 to the last page |
| -3 | 1, 2, 3 |
| 5-3 | 5, 4, 3 (backwards) |
| 2, 1 | 2, then 1 |
Example: a job application in one file
You have a cover letter (1 page), a CV (2 pages) and a certificate scan (3 pages, of which only page 1 matters). Add the three files in that order and type 1 in the certificate's Pages box.
The result is one 4-page PDF: the letter, the two CV pages, then the first page of the certificate, ready to attach to a single email.
Frequently asked questions
Are my PDF files uploaded anywhere?
No. The files are read and merged by your browser on your own device. Nothing is sent to our server, which you can check by merging with your internet connection turned off after the page has loaded.
Is there a limit on file size or number of files?
You can add up to 100 files of up to 200 MB each. The real limit is your device's memory: a phone may struggle with several very large files, where a computer will not.
Will the quality of my PDF change?
No. Pages are copied as they are, without converting them to images or compressing them, so text stays sharp and searchable.
Why is my PDF refused as encrypted?
Some PDFs are encrypted, even when they open without a password, to stop copying or editing. Their pages cannot be copied without decrypting them, which this tool does not do. If you are allowed to, open the file and print it to a new PDF, then merge that copy.
Can I merge the same file twice, or reorder pages inside one file?
Yes. Add the file twice to repeat it. To reorder the pages of a file, type them in the order you want in its Pages box, for example 3, 1, 2.
Does it work on a phone?
Yes, in any up-to-date browser on Android or iPhone. Tap Choose files and pick the PDFs from your files or cloud storage.
Sources
Figures and text last checked on Tuesday, November 10, 2026.