Protect Pdf With Password

Protect PDF

Password-protect PDF files — secure financial bids and confidential tender documents.

Your data never leaves your browser — all processing happens locally on your device.

Password-protects your PDF with AES-256 in a Pitara envelope file (.protected). Use Unlock mode to open it again with the same password.

Drop PDF to protect

About this tool

The Protect PDF tool encrypts your PDF with a password so only authorized recipients can open it. Useful for securing price bids, proprietary technical data, or internal tender drafts before sharing. Encryption runs locally with pdf-lib — passwords and files never leave your browser.

How to use the Protect PDF

  1. 1

    Upload PDF

    Select the document to secure.

  2. 2

    Set password

    Enter and confirm your password.

  3. 3

    Download protected PDF

    Save the encrypted file.

Frequently Asked Questions

What encryption is used?

Standard PDF password protection compatible with most PDF readers.

Can I remove a password later?

Open the protected PDF with the password in any PDF tool that supports decryption.

Is my password stored?

No. We never see or store your password or file.

Related Tools

Fill & Sign PDFFill tender forms and add a drawn digital signature plus date stamp — free, in your browser.Merge PDFCombine multiple PDF files into one document in your chosen order — free, private, in-browser.Compress PDFReduce PDF file size by re-rendering pages at lower quality — processed privately in your browser.PDF EditorEdit PDF files free — add text, links and images to tender documents in your browser.