Proteger um PDF Criptografia AES 256 bits. Controle o acesso e as permissões.
Arraste e solte seu PDF aqui
ou clique para selecionar
PDF — Max 50 MB
Senha de abertura
Permissões (restrições opcionais)
PDF protegido com sucesso!
BaixarResultados concretos
Exemplos reais de compressão em arquivos típicos
Antes / Depois
PDF desprotegido
PDF criptografado
AES
256-bit
6s
tempo médio
Redução por modo
"Meu contrato PDF agora está protegido por senha em 5 segundos!"
How to password-protect a PDF online?
Password-protecting a PDF prevents unauthorised access to your confidential documents. FileSwiftly applies AES 256-bit encryption — the banking standard — in seconds, entirely online, with no software required.
AES 256-bit encryption
AES 256-bit encryption is used by banks, governments and militaries to protect their most sensitive data. With a strong password (12+ characters, uppercase, digits, symbols), it is virtually unbreakable. Even with the most powerful computers, a brute-force attack would take billions of years.
PDF permission restrictions
In addition to the open password, you can set permission restrictions: block printing, prevent text copying, or disable editing. These restrictions are independent of the open password — you can apply them even to a PDF without an open password.
Remove PDF password protection
To remove the password from a PDF you own, use our Unlock PDF tool. Enter the current password and download your decrypted PDF.
FAQ
What if I forget my password?
There is no recovery option. AES 256-bit encryption is designed to be irreversible without the password. Keep it safely stored.
Can I protect an already-encrypted PDF?
Yes, but you'll need to unlock it with the old password first, then re-protect it with the new one.
Precisa de mais?
Proteja lotes de PDFs em massa com Pro
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