Protect PDF
Add password encryption and permission limits to a PDF.
Upload a PDF, set an open password, choose print/copy/edit permissions, and download an encrypted document. Encryption uses a 256-bit key.
What you control
- User (open) password — required to open the file
- Optional owner password — if omitted, the user password is used for both roles
- Print, copy, and modify switches; annotations, form filling, and page assembly stay disallowed
Limits
- One PDF up to 10 MB
- Forgotten passwords cannot be recovered here
- Protection is not a full DRM system against determined extraction
Passwords are used only for the current job and are not stored.
Security and privacy
Encryption at rest
Files are encrypted during storage with AES-256-GCM using a unique key per file
Auto-deletion
Uploaded and processed files are removed after the session ends
Temporary sessions
Processing sessions expire automatically and are not kept as a permanent archive
Protected download links
Downloads require a short-lived access token — not a public permanent URL
Recommended tools
FAQ
No. Passwords are sent only as parameters for the current processing job and are not kept afterward.
Passwords are transmitted to the service only as parameters of the current processing and are not recorded by the browser or converter. The downloadable PDF must be no more than 10 MB.
Yes. Files are transferred over a secure connection, encrypted while stored on the server, and automatically deleted. Flimpa does not store documents permanently and does not use them to train models.