Desbloquear PDF

A locked or password-protected PDF is one you can't open, print, or copy without entering the right password. This is common for sensitive documents you've received—bank statements, legal agreements, government forms—where the sender set access restrictions. If you own the document and have the password, unlocking it removes those restrictions for your own convenience.

Note that unlock tools work by providing the owner or user password to remove the protection—they do not bypass encryption without authorization. You must have legitimate access (know the password) to use an unlock tool. For documents you receive from others with passwords, you'll need to obtain the password from the sender.

Como Desbloquear um PDF em 3 Passos

1. 1

   Envie seu PDF protegido por senha

   Arraste seu PDF protegido por senha para a página ou clique para procurar. Arquivos de até 100 MB são suportados.

2. 2

   Insira a senha do documento

   Digite a senha atual. FileCrank suporta todos os tipos de criptografia PDF padrão, incluindo RC4 e AES.

3. 3

   Baixe o PDF desbloqueado

   Seu PDF desbloqueado está pronto em segundos. Baixe-o e abra em qualquer leitor de PDF — nenhuma senha necessária.

How PDF Unlocking Works

PDF encryption uses the PDF standard encryption dictionary, which specifies the encryption algorithm (RC4 or AES), key length, and permission flags. Two passwords can be set: the User password (required to open the document) and the Owner password (required to change permissions). When you unlock a PDF, the engine decrypts the document using the provided password, then writes a new PDF without the encryption dictionary—effectively a plain, unprotected PDF.

PDF/A documents cannot have encryption by design (the standard requires full accessibility). Standard PDFs encrypted with AES-256 (PDF 1.7/2.0 standard) provide strong security, while older RC4-40 encryption is considered weak and can be bypassed with brute force. FileCrank's unlock tool requires you to supply the correct password.

Por que usar FileCrank para desbloquear PDFs

• ✓ Remove proteção por senha de PDFs criptografados com AES-128, AES-256 e RC4
• ✓ Funciona com senhas de usuário e senhas de proprietário
• ✓ Suporta arquivos PDF de até 100 MB
• ✓ Sem conta, e-mail ou instalação de software necessários
• ✓ Arquivos são automaticamente excluídos de nossos servidores em 1 hora
• ✓ Processado por HTTPS — seu PDF e senha nunca são armazenados

Recursos e Especificações

Tamanho máx. do arquivo

Até 100 MB

Privacidade

Arquivos excluídos após cerca de uma hora

Preço

Grátis, sem cadastro

Processamento

No servidor

Perguntas Frequentes

Unlock PDF vs. Remove Permissions vs. Decrypt

These terms describe the same operation at different levels. 'Unlock' typically refers to removing the password requirement to open the file. 'Remove permissions' means removing print/copy/edit restrictions without necessarily removing the open password. 'Decrypt' is the underlying technical operation. FileCrank's Unlock PDF tool removes all encryption and permission restrictions, producing a fully accessible PDF.

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