100% offline · nothing uploaded
Merge PDF Securely — 100% Offline, Nothing Uploaded
Combine PDFs entirely in your browser. Files never touch a server — the only truly private way to merge confidential documents. Free to try.
- Merging runs 100% client-side via WebAssembly — zero upload, zero server retention.
- Combine unlimited files in one pass; reorder pages with drag-and-drop.
- Ideal for legal bundles, board packs, and financial statements.
- No watermarks, no file-size gate on paid plans.
Frequently asked questions
- Are my files uploaded when I merge PDFs?
- No. Studio PDF PRO processes everything inside your browser using WebAssembly. Your documents never leave your device and are never transmitted to any server.
- Is there a limit on how many PDFs I can merge?
- Paid plans merge an unlimited number of files with no per-file size cap beyond your device memory.
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