Protect PDF
Add a password and restrict permissions.
Password-protect your PDF files for free without uploading to any server. HonestPDF's browser-based encryption tool lets you add a password and restrict printing, copying, and editing on any PDF.
Drag & drop your PDF here, or click to select
PDF files only
①Select file→②Set password→③Download
How to password protect a PDF
- Set Password: the password needed to open the file, typed twice. The file is encrypted with AES-256.
- What the recipient can do: allow or block printing, copying text and images, and editing. Most PDF readers follow these settings; some editing programs ignore them.
- Owner password: the password that can change those settings. Leave it blank and one is generated.
Frequently asked questions
Is my password or file uploaded to your servers?
Never. Your PDF is encrypted on your own device by qpdf, an open-source PDF library that runs inside your browser as WebAssembly.
Can I restrict printing or copying without blocking viewing?
No. The recipient always needs the open password to open the file. With it, they get only the printing, copying and editing rights you allowed.
Is there a limit on how many files I can encrypt?
None. Encrypt hundreds of confidential files completely free.
What encryption standard does HonestPDF use?
AES-256, every time. The file is encrypted with AES and a 256-bit key, the strongest encryption the PDF format defines, and current PDF readers such as Adobe Acrobat, Chrome and Firefox open it. There is no weaker setting to fall back to.
Can I add both an open password and a permissions password to the same PDF?
Yes. You can set a User Password (required to open the file) and a separate Owner Password (controls printing, editing, and copying permissions). Both levels of protection can coexist on one document.
Will the recipient need a password every time they open the file?
Yes. Every file this tool protects needs its open password to open.
Can I protect a PDF that already has existing annotations or form fields?
Yes. The encryption is applied to the entire PDF document including any existing annotations, form data, bookmarks, and embedded files without altering the content.
How is this different from password-protecting a ZIP file?
PDF encryption protects the document at the content level with granular permissions. ZIP password protection only prevents extraction and does not control what users can do after opening.