Set one password and lock a whole folder of PDFs — each is encrypted in your browser and packaged into a single ZIP. Nothing is uploaded.
or drop files / a folder here
// Benefits
Lock an entire folder of PDFs with one password and get them all back as a single ZIP.
Set a single password once and apply real AES-256 encryption to every PDF in the batch — no opening and re-saving files one at a time.
Every encrypted PDF comes back named after the original in one tidy ZIP, ready to forward or archive in a single download.
Process up to 30 PDFs in a run, with already-encrypted files skipped automatically so nothing is double-locked.
// Workflow
For the moment you need to send a folder of contracts, statements, or records and every file has to be password-protected before it leaves your hands.
Drop in your PDFs or pick a whole folder at once.
Type one password and encrypt every file in the batch.
Download the single ZIP of protected PDFs.
// Recommended reading
Related tools and guides for locking and unlocking documents.
Drag your PDFs onto the box — or drop an entire folder, or click to choose files. Type one password (the "Password" field), then click "Encrypt all". Every file is locked with that same password, and you get a single ZIP back with each file renamed to "…-protected.pdf".
No. This is a 100% client-side tool — every PDF is encrypted right inside your browser and nothing ever leaves your device. There is no upload, no account, and no copy kept anywhere. You can even run it offline once the page has loaded.
You get one ZIP file named "dockdocs-protected.zip". Inside it, each input PDF appears as its own encrypted file with a "-protected.pdf" suffix. Open any of them and your reader will ask for the password you set.
The password must be 4–32 characters using only letters, digits, and the underscore (_) — that keeps it safe to apply across every PDF reader. You can encrypt up to 30 files per batch; for more, just run the tool again. There's no hard size limit, but because everything runs in your browser, very large jobs go slower on low-memory devices.
It's skipped. The tool can't re-lock a file it can't open, so any PDF that already has a password is left out of the ZIP rather than failing the whole batch. Decrypt it first (with the original password) if you want to re-encrypt it here.
Yes, completely free with no sign-up and no watermark. The encrypted PDFs are byte-for-byte your originals plus the password — DockDocs adds nothing to them.
This tool runs entirely in your browser. Your file never leaves your device — it isn't uploaded to any server.
Check for yourself: open your browser's developer tools (F12, or right-click → Inspect) → the Network tab → then run this tool. You won't see your file uploaded anywhere, because the work happens locally on your device.