Mark a PDF as restricted, set permission metadata and control how the document is presented before sharing it. Free, private and browser-based.
Protect PDF marks a document with restriction metadata and permission flags that compliant PDF readers will honour, such as discouraging printing, copying or editing, before you share the file. It is aimed at people who want to signal that a document is restricted or confidential without needing full desktop encryption software.
It is important to understand what this tool does and does not do: it sets permission flags and presentation metadata, it does not apply military-grade AES encryption that makes the file unreadable without a password. For documents that must be completely locked down for legal or compliance reasons, pair this with a password-protection feature in a full desktop PDF suite; for everyday sharing where you want to discourage casual copying or printing, this browser-based tool is quick and requires no installation.
Restriction metadata is applied entirely in your browser, so you do not need Acrobat or another paid PDF suite to mark a document as restricted.
Choose independently whether printing, copying or editing should be discouraged, matching the level of restriction to how the document will be used.
For internal drafts or documents you simply want to discourage casual copying of, this is far quicker than setting up full encryption workflow.
The PDF is read and modified locally, so the content of confidential documents is never sent to a server during protection.
This tool sets document permission flags that well-behaved PDF readers respect, but it does not encrypt the file's content with AES, so a determined user with different tools could bypass the restriction. For files that must be genuinely unreadable without a password, use full password encryption in desktop software instead.
Combine restriction settings with a visible watermark identifying the recipient, and share the file through a controlled channel such as a secure link rather than an open upload. Restriction metadata is one layer of a sharing policy, not a complete substitute for access control.
Most modern PDF viewers grey out printing or copying options when restriction flags are set, giving a clear visual signal to the reader that the file is intended to stay controlled, even though the underlying text remains technically present in the file.
If the document contains information that would cause real harm if read by an unauthorised person — legal filings, medical records, financial statements — apply password-based AES encryption in a desktop PDF suite rather than relying on restriction metadata alone.
No — it sets document restriction metadata that compliant readers honour. For legally sensitive files that must be unreadable without a password, use full encryption in a desktop PDF suite.
Combine restriction settings with a watermark identifying the recipient, and send through a link that expires rather than as an open email attachment.
Yes. Protect PDF on Klipza is completely free with no account, no subscription and no watermark on your files, and there is no daily usage limit.
Processing happens locally in your browser wherever technically possible, so your files are not uploaded to a server, stored or shared with third parties.
Yes. It is fully responsive and runs in any modern browser on Android, iPhone, iPad, Windows and macOS — nothing to install.