Lock and unlock PDF files without uploading them
PDFSmith runs entirely in your browser. Add AES encryption, remove a password from a file you can already open, or swap in a new one. Nothing ever leaves your device.
How PDFSmith works
Drop in your file
The PDF opens inside your browser tab. It is never sent to a server, so it works on wifi, on cellular, or with the network cable pulled out.
Download the result
The processed file is saved straight back to your device. There are no queues, no watermarks, and no limits on how many files you handle.
Features
Unlock PDFs
Remove password protection from PDFs when you know the correct password. Safe and legitimate PDF unlocking that requires password verification.
Lock PDFs
Add password protection to PDF files to keep sensitive information secure. Lock PDFs quickly before sharing or storing them.
Change Password
Update or replace an existing PDF password without recreating the document. Maintain security over time with easy password changes.
Offline processing
Works with no internet connection required. Once the page has loaded, process PDFs anywhere, including on flights and in restricted networks.
Privacy first
No cloud uploads or file transmission. Your PDF is processed in your own browser tab, so confidential documents stay confidential.
Fast and instant
Unlock or lock PDFs in seconds with on-device processing. No waiting in queues, no file size limits set by a server.
Try it with one of your own files
No account needed. Pick a tool below and your document stays in the browser tab from start to finish.
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