Merge PDF
Drop two or more PDFs below and click Combine PDFs to merge them into a single file. Pages are copied exactly — text, images and links all carry over without quality loss. Arrange the files with the up and down arrows to set the page order. Everything happens locally in your browser — your files never leave your device.
Read the guide: How to merge PDF filesInput
Output
Processed locally in your browser — nothing is uploaded.
How the Merge PDF works
- Each PDF is read into your browser and parsed by pdf-lib, a client-side PDF manipulation library.
- Every page is copied directly into a new combined PDF — text, images and links carry over without re-rendering.
- Pages are appended in the order you arrange the files, so the output reads front to back as one document.
- The result is a standard .pdf file ready to download and share.
Useful tips
- Arrange the file list with the up/down arrows before merging — pages follow that order.
- Pages are copied losslessly, so the merged file is roughly the sum of the originals.
- Remove passwords from encrypted PDFs first — protected files can't be read.
Frequently asked questions
Are my PDFs sent to a server?+
No. The entire merge runs in your browser using JavaScript. Your PDFs are never uploaded to any server, so it is safe to merge sensitive documents like contracts or invoices.
How many PDFs can I combine?+
As many as you like — you need at least two. Each file's pages are appended in the order of the list, so arrange them with the up and down arrows before merging.
Does it reduce quality?+
No. Pages are copied as-is into the new PDF — text, images, vectors and links all carry over without re-rendering or recompression. The output quality is identical to the originals.
Can I merge password-protected PDFs?+
No. Encrypted PDFs can't be read without the password. Remove the password from each file first, then merge the unprotected copies.
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