VaultPDF · private PDF tools
Merge PDF without uploading anything
Every other “free online PDF merger” quietly uploads your documents to their servers. For a signed contract, an ID scan, a tax return or a medical record, that’s a real privacy risk — once a file leaves your device, you’ve lost control of it.
VaultPDF merges your PDFs entirely inside your browser. The files are read into memory on your own machine, combined locally, and saved back to your downloads. Nothing is transmitted, stored, or seen by any server. You can disconnect from the internet after the page loads and it still works.
Open VaultPDF — merge PDFs now →How to merge PDFs privately
- Open the VaultPDF app (it’s a single page, no signup).
- Drag in all the PDFs you want to combine.
- Drag the page thumbnails to set the exact order you want.
- Click
Export PDF— the merged file downloads straight to your device.
Why “in the browser” actually matters
- No upload — your file never travels to a third party, so it can’t be logged, leaked, or retained.
- No account — nothing to sign up for, no email harvested.
- Works offline — proof that nothing is being sent: kill your wifi and it still merges.
- No size cap from a server — you’re limited only by your own machine.
FAQ
Is it really not uploaded? Correct — VaultPDF uses the browser’s own PDF engine. Open your network tab, merge a file, and you’ll see no upload request.
Does it cost anything? Merging, splitting, rotating and text extraction are free. A one-time Pro unlock adds watermarking and batch tools.
Which browsers? Any modern browser on desktop or mobile.