PDF パスワード保護 Document
Encrypt your PDF with a password to restrict access. All processing is completed locally in your browser memory.
PDFファイルを選択
or drag and drop PDF here
Encrypt your PDF with a password to restrict access. All processing is completed locally in your browser memory.
or drag and drop PDF here
Standard cloud lockers require uploading unencrypted PDF archives to their remote environments to append key locks. This poses security and compliance risks. Document Alter executes cryptographic operations directly inside your browser's memory context.
The tool processes your document byte stream locally, combining your custom user password with encryption hashes using @pdfsmaller/pdf-encrypt-lite. The security parameters are compiled directly into the PDF's header catalog metadata dictionary, ensuring robust lock integrity.
Drag and drop the target PDF you want to protect into the secure dropzone.
Enter your chosen password in the input field within the settings sidebar.
Click the 'Encrypt PDF' button to run encryption routines locally and save your password-locked file.
ローカルモジュールを用いてブラウザ内で直接パスワード暗号化を適用します。
はい。ブラウザ内RAMで暗号化されるため、パスワードが外部へ漏洩することはありません。
標準的な暗号化規格を採用し、正しいパスワードなしでの閲覧を確実に防止します。