Kastavo

Protect PDF with Password

Upload a PDF, set a password, and download a protected copy — all processed in your browser.

Your PDF is processed directly in your browser. The file is never sent to our servers.

Not sure? Turn your internet off and try — it still works.

How it works

All processing happens locally, in your browser. Your PDF is never sent to our servers or to any external service, at any point. The password you set here is required to open the file in any PDF reader. Use a password you'll remember — if it's lost, this site has no way to recover access to the document.

Frequently asked questions

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