Merge PDF files — without uploading anything.
Combine multiple PDFs into one in your browser. No sign-up, no server, no upload — your documents stay on your device throughout.
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🔒 No upload · Runs entirely in your browser
How do you merge PDFs without uploading them?
Most online tools merge PDFs by sending every file to a remote server. Vikone runs the merge entirely in your browser using pdf-lib (MIT). Each PDF is read locally, pages are copied in the order you choose, and a new combined file is created — without a single byte leaving your device. You can verify this yourself: open the Network tab in your browser's DevTools while merging. Zero file uploads.
How it compares
| Feature | Vikone Private | Typical online tools |
|---|---|---|
| Files sent to a server | Never | Every time |
| Works offline | Yes — no internet needed | No |
| Page order control | Yes — reorder before merge | Limited |
| Account required | No | Often |
How to merge PDFs
- Add your PDF files using the tool above — drop them in or click to select.
- Use the arrows to set the page order exactly how you want it.
- Click "Merge PDFs" — the files are combined in your browser, locally.
- Download the merged PDF. Open the Network tab to confirm zero file uploads.
Frequently asked questions
- Are my PDFs uploaded when I merge them?
- No. The entire merge happens in your browser using pdf-lib. Your PDFs never leave your device — open the Network tab while merging to verify there are zero file upload requests.
- Can I control the order of pages in the merged PDF?
- Yes. You can reorder the files before merging using the up and down arrows. Pages from each PDF are added in that file's own page order.
- How many PDFs can I merge at once?
- You can merge as many PDFs as your browser can handle in memory. For very large files, performance depends on your device.
- Does merging change the content of the PDFs?
- No. Pages are copied exactly as they appear in the originals. Text, images, links, and formatting are all preserved.