Merge PDF
Combine two or more PDF files into a single document. Reorder files before merging and download the combined result instantly - everything happens inside your browser.
- Processed locally in your browser
- No watermark
- No sign-up
- Works offline
Choose PDF files or drop them here
Select 2 or more PDFs · processed locally
How it works
- 1Select or drop two or more PDF files.
- 2Arrange them in the order you want using the arrows.
- 3Click Merge. Pages are copied losslessly into a new document.
- 4Download your merged PDF.
Your privacy
This tool runs entirely inside your browser using JavaScript and Web Workers. Your document is never uploaded to any server — you can even disconnect from the internet and keep working once the page has loaded.
Frequently asked questions
▸Are my files uploaded to a server?
No. Merging runs entirely in your browser with pdf-lib. Your files never leave your device.
▸Will links, forms and annotations survive?
Page content is copied structurally. Most annotations and form fields are preserved where the underlying library supports them; heavily encrypted files must be unlocked first.
▸Is there a file size limit?
There is no artificial limit. Very large jobs are constrained only by your device's memory, and we warn you before risky operations.