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Protect PDF with password online — free

Free online PDF password protection. Lock a PDF file with a password so only recipients with the key can open it.

⚙️ พารามิเตอร์การดำเนินการ

Why protect a PDF with a password?

Password protection keeps sensitive documents safe. Only people who know the password can open, view or share your PDF file.

How to set it up?

1. Upload a PDF — drag and drop a file or select it via the file picker.

2. Convert — click "Process" to start.

3. Download — get the resulting PDF instantly.

การดำเนินการที่เกี่ยวข้อง

APNG to AVIF Convert APNG to AVIF online free APNG to GIF Convert APNG to GIF online free APNG to WebP Convert APNG to WebP online free ARW to AVIF Convert ARW to AVIF online free

❓ คำถามที่พบบ่อย

Is it free?
Yes, conversion is completely free with no limits.
Are my files safe?
Yes. Files are automatically deleted right after conversion and download.
How many files can I upload?
Up to 3 files at a time.