PDF Password Protection
Add a password without uploading the file
Browser-only decryption cannot currently preserve PDF text, links, and forms safely, so decrypt is disabled.
Quick guide
What can PDF Password Protection help you do?
Add AES-128 password protection to a PDF locally in your browser. Decryption is intentionally unavailable because a safe document-preserving implementation is not supported.
Best for
PDF Password Protection is made for quick image, PDF, thumbnail, and social-media file work before sharing or publishing. It is handy when you need a clean result without a heavy editor.
How to use it
For PDF Password Protection, enter the URL or text, choose colors and sizes, or upload the file the tool asks for. Review the preview before downloading or copying the result.
How to read the result
After using PDF Password Protection, before downloading or copying, check dimensions, clarity, file size, page order, and text placement. For websites or social posts, make sure the filename and purpose are clear.
Privacy and limits
When using PDF Password Protection, image, PDF, and visual asset work is handled mainly in the browser with no sign-in. Very large PDFs, videos, or high-resolution images may be limited by device memory.
For PDF Password Protection: Only process material you have the right to use. If it contains IDs, addresses, contracts, faces, or unpublished brand assets, review redaction and permissions before sharing.
Frequently Asked Questions
Can this tool decrypt a PDF?
No. Browser-only decryption is disabled because the available workaround would rasterize pages and damage document content.
How strong is the encryption?
The output uses the PDF 1.7 standard security handler with AES-128.
Is my file uploaded?
No. Everything runs via pdf-lib in your browser.