Merge PDF
Join contracts, invoices, scans or chapters into a single PDF. Add as many files as you need, put them in the right order and download one merged document.
Runs in your browser
How to use
- Drop two or more PDF files (or select them).
- Reorder them with the up and down arrows.
- Click Merge PDF.
- Download the merged file.
How it works
Each page of each file is copied, in order, into a new PDF. Page content — text, fonts, images, vector graphics — is copied as-is, so nothing is re-compressed or rasterised and text remains selectable and searchable.
Files are processed in your browser with the open-source pdf-lib and pdf.js libraries — they are never uploaded. Interactive form fields and bookmarks from the source files may not be carried over.
Examples
- Job application
- CV + cover letter + diplomas → one PDF to upload.
- Monthly invoices
- Merge 12 invoices into one annual file for your accountant.
- Signed contract
- Merge the unsigned contract with the page you printed, signed and scanned, so the counterparty gets one file.
Common uses
- Job and university applications
- Combining invoices and receipts
- Assembling reports from several authors
- Scans done page by page
Privacy & security
This tool runs entirely in your browser. Your files and text are never uploaded to our servers — processing happens on your device and results are created locally. How each tool handles files
Frequently asked questions
Is there a limit on the number of files?
No fixed limit. Very large merges are limited only by your device's memory.
Will the quality change?
No. Pages are copied without re-compression.
Can I merge password-protected PDFs?
Encrypted PDFs must be unlocked first with the software that created them.
Why is the merged file so large?
A merge adds the files together without re-compressing them, so the result is roughly the sum of the parts. Scanned pages are images and weigh the most — run the result through Compress PDF if you need it smaller.
Can I change the order of the files?
Yes. Drag a file in the list, or use the move up / move down buttons. Pages are taken in the order shown, top to bottom.
The page sizes don't match. Is that a problem?
No. A PDF can hold pages of different sizes and orientations, and each page keeps its own. If you need one consistent format, set it in your printer dialog when printing.
Last updated: