Merge PDF files
Combine several PDF files into one document — privately, right in your browser.
or drag and drop here · processed on your device, never uploaded
About this merge pdf
Combine invoices, scanned pages, reports or application documents into a single PDF that's easier to email, upload or print. Add your files, put them in the right order and download one merged PDF in seconds.
Unlike most online PDF tools, nothing is uploaded: the merge runs inside your browser using the open-source pdf-lib library. That makes it safe for tax returns, contracts and ID documents, and fast even on large files.
How to use the Merge PDF
- Click the box or drag your PDF files onto it.
- Use the arrows to put the files in order.
- Click "Merge PDFs".
- Your merged.pdf downloads automatically.
How the merge works
Each page from each file is copied, in order, into a new PDF document. Text stays selectable, links and page sizes are preserved, and nothing is re-compressed, so quality is unchanged.
Worked example
Merging a 2-page cover letter, a 3-page resume and a 1-page reference list gives a single 6-page PDF in the order you set.
Tips for better results
- Password-protected PDFs need to be unlocked in a PDF reader first.
- To take pages out instead, use the PDF splitter.
Frequently asked questions
Is it safe to merge confidential PDFs here?
Yes. Files are processed on your device and are never sent to a server.
Is there a file size or file count limit?
There's no fixed limit; very large files depend on your device's memory.
Does merging reduce quality?
No. Pages are copied as they are without re-compression.
Last reviewed: October 2026 · Results are calculated in your browser.