PDF Tools
Merge PDF
Combine several PDF files into a single document. Drag to reorder, then merge and download — all locally in your browser, with no uploads and no watermark.
Drop PDF files here or click to browse
Files stay on your device — nothing is uploaded.
How to merge PDF files
- Add the PDFs you want to combine — drag them onto the tool or pick them from your device.
- Put them in order with the up and down arrows, and remove any file you added by mistake.
- Merge. Every page of every file is copied, in the order shown, into one new PDF.
- Download the combined document. Your original files are untouched.
What carries over into the merged PDF
The merged file is roughly as big as the originals added together, because each page brings its own fonts and images with it. If the result is too big to email, remove pages you don't need with Split PDF, or run scanned documents through Compress PDF.
| Element | Result |
|---|---|
| Page content — text, images, vector graphics | Kept exactly, with no re-compression |
| Page sizes and orientation | Kept per page, so A4 and Letter pages can sit side by side |
| Selectable, searchable text | Kept |
| Bookmarks and document outline | Not kept |
| Fillable form fields | May stop working — fill in or flatten forms first |
| Digital signatures | No longer valid — any change to a signed file breaks the signature |
| Document title and author | Not carried over from the source files |
Password-protected PDFs
PDFs protected with a password — including ones that open freely but restrict printing or editing — are encrypted internally, and this tool can't decrypt them. Their pages may come out blank or garbled in the merged document. Open the file in your PDF reader, save or print a copy to PDF without the protection, and merge that copy instead.
Common reasons to merge PDFs
- Job and university applications that accept a single file: CV, cover letter, transcripts and certificates in one upload.
- Expense claims and tax paperwork: receipts and invoices combined into one document per month or per trip.
- Multi-page documents that a phone scanning app saved as separate files, one page each.
- Contracts whose appendices arrived as separate attachments.
Getting the page order right
The merged document follows the list from top to bottom: all pages of the first file, then all pages of the second, and so on. Check that each source file's own pages are in the right order before merging — this tool combines documents but doesn't reorder the pages inside them. If a file needs rearranging, split it into pieces first and add the pieces to the list in the order you want.
For applications, use the order the reader expects: cover letter first, then CV, then supporting documents in the order the job advert or form lists them.
Frequently asked questions
Are my PDF files uploaded to a server?
No. The merging happens entirely in your browser using your device's processor, so your documents never leave your computer — ideal for private or confidential files.
Can I change the order of the files?
Yes. After adding your PDFs, use the up and down arrows to arrange them in the exact order you want before merging.
Can I merge PDFs on my phone?
Yes, in any modern mobile browser. Pick the files from your phone's Files app or cloud storage, arrange them, and the merged PDF is saved to your downloads.
Is there a limit on the number or size of files?
There's no set limit. Everything happens in your browser's memory, so a computer can merge hundreds of pages comfortably; on a phone, very large scanned files may be slow.
Can I merge only some pages from each file?
Extract the pages you need from each document with Split PDF first, then merge the extracts here in the order you want.