Is it safe to protect sensitive PDF files here?

Yes, 100% safe. ScanFlow processes your files entirely within your web browser. Your files are NEVER uploaded to any server.

Is this tool completely free?

Yes, our tool is completely free to use with no hidden limits.

Protect PDF locally

Secure your documents with encryption that runs entirely on your device. Nothing is uploaded to a server.

Upload a PDF and encrypt it with a password in milliseconds.

100% Private: Files are processed offline in your browser. No server uploads.

100% On-Device Document Processing

Scan, Edit & Sign PDFs with local, on-device processing.

✨ No subscriptions • No accounts • Files stay on your device