PDF
Merge & Split PDFs (No Upload)
Merge multiple PDFs or split one into pages — entirely in your browser. No upload, no signup. Powered by pdf-lib.
Runs entirely in your browser · Your input is never transmitted
FILES
Drop PDFs here
0 files
OUTPUT
—Waiting
How to use
- Pick Merge to combine multiple PDFs (drag rows to reorder).
- Pick Split to break one PDF into individual pages or a page range.
- Click the action button — files are processed locally and downloaded.
Frequently asked
Does my PDF leave my browser?
No. Files are read with the File API and manipulated by pdf-lib entirely in JavaScript on your device. Open DevTools → Network during a merge or split — it stays empty.
Are encrypted PDFs supported?
Password-protected PDFs will fail to open in pdf-lib without the password. Decrypt the file first.
Will form fields and signatures survive?
Form fields usually copy. Digital signatures are bound to the original document hash, so any modification — merge or split — invalidates them per the PDF spec.
Is there a file size limit?
Limited only by your browser's available memory. Multi-hundred-MB PDFs may be slow but will work on a desktop with sufficient RAM.