StatusQueen's Protect PDF tool adds a password to a PDF using AES-256 encryption — the modern PDF 2.0 standard. Anyone who tries to open the protected file will be asked for the password before they can read it. The original document content is unchanged; we just wrap it in an encryption layer.
How to password-protect a PDF
- Drop your
.pdffile into the upload area, or click choose file. - Type a password (4 to 127 characters) and confirm it. Use the eye toggle to verify what you typed.
- Click Protect PDF. The encrypted PDF downloads as a single file.
- Anyone you share the file with will need this password to open it. Save the password somewhere safe — there is no recovery if you forget it.
When you'd want to protect a PDF
- Confidential reports. Salary information, board minutes, legal opinions — anything you'd email but only to specific recipients with the password.
- Tax filings and financial records. Add a password before sending sensitive documents to your accountant or filing service.
- Medical records and diagnostics. Healthcare providers and patients alike often need to share scans, prescriptions, and test results with privacy protections.
- HR documents. Offer letters, severance agreements and reference letters often go out as encrypted PDFs.
- Personal documents shared with family. ID copies, will drafts, asset lists — encrypt before sharing on any messaging app.
Encryption details
- AES-256. The strongest PDF encryption standard, defined by PDF 2.0. Supported by Adobe Acrobat, Apple Preview, Chrome, Firefox, Foxit, and basically every modern PDF reader.
- Single password. Used for both the user password (required to open) and owner password (required to remove restrictions). Recipients with the password can do anything with the PDF — print, copy, edit.
- No back door. If you forget the password, there's no way for us — or anyone — to recover the document. Pick something memorable or save it in a password manager.
- Page content unchanged. We don't re-render or modify the document — encryption wraps the original bytes intact.
Limitations
- Already-protected PDFs are rejected. If your PDF already has a password, unlock it first via our Unlock PDF tool, then re-protect with a new password here.
- 50 MB max per upload. Larger files? Run them through our Compress PDF tool first.
- Password length: 4–127 characters. AES-256 supports up to 127 chars; we enforce a 4-char minimum to keep the encryption meaningful.
Privacy and security
Your PDF and password are uploaded over HTTPS, processed on our server, and removed automatically after five minutes — or immediately when you click Delete file from server on the result screen. We do not log passwords, store the encrypted file, or analyse the document contents. For details, see our Privacy Policy.
Frequently Asked Questions
How do I password-protect a PDF?
Drop your PDF, type a password, confirm it, then click Protect PDF. The encrypted PDF downloads as a single file.
Is the Protect PDF tool free?
Yes — every encryption on StatusQueen is completely free. There is no sign-up, no watermark and no daily limit.
What encryption is used?
AES-256, the modern industry-standard PDF encryption (PDF 2.0 spec). Strong, well-supported in every PDF reader from Adobe Acrobat to Preview to Chrome.
How big can my PDF be?
Up to 50 MB. There is no page-count limit — encryption is fast even for hundreds of pages.
Can I remove the password later?
Yes. Use our Unlock PDF tool, supply the password, and you get back an unprotected PDF.
What if I forget the password?
There is no recovery. AES-256 has no back door. Pick a password you can remember (or save it in a password manager) before encrypting an important document.
Are my PDFs safe on this site?
Yes. PDFs are uploaded over HTTPS, encrypted on our server, then deleted as soon as you start a new batch — or automatically after a few minutes. We do not keep, share or analyse your documents and do not log your passwords.