# Add a password to a PDF Encrypt a PDF in a Power Automate flow so it cannot be opened without a password, with a choice of AES-128 or AES-256 encryption. Use this action to encrypt and protect a PDF document with a password to prevent unauthorized access. <PowerAutomateAction title="Add a password to a PDF" caption="Add a password to a PDF." fields={[ { label: "File Content", kind: "token", value: "File Content", required: true }, { label: "Password", placeholder: "The password required to open the file", required: true }, { label: "Encryption Algorithm", kind: "select", value: "AES-128", options: ["AES-128", "AES-256"], advanced: true }, ]} /> ## Parameters <ParamField name="File Content" type="File" required> The content of the input PDF document. </ParamField> <ParamField name="Password" type="String" required> The password required to open the file. The length is between 4 and 32 characters. The characters in the password must be in the ASCII printable range (between positions 32 and 126). This range includes lowercase and uppercase letters, numbers, space, and some commonly used symbols like . , : ; # $ % & ( ) * + = ? ! </ParamField> <ParamField name="Encryption Algorithm" type="String" default="AES-128"> The algorithm used to encrypt the PDF document. This field is optional. Valid values are AES-128 and AES-256. </ParamField> ## Response <ParamField name="Password Protected PDF File Content" type="File"> The content of the password protected PDF document. You can use it as an input to other actions in your flow. </ParamField> ## Related actions <CardGroup cols={2}> <Card title="Remove password" href="/docs/power-automate/remove-password-from-pdf"> Take the password back off an encrypted document. </Card> <Card title="Add restrictions" href="/docs/power-automate/add-restrictions-to-pdf"> Restrict copying, printing, and editing instead of blocking access. </Card> <Card title="Remove restrictions" href="/docs/power-automate/remove-restrictions-from-pdf"> Clear the restrictions from a document. </Card> <Card title="Remove signatures" href="/docs/power-automate/remove-signatures-from-pdf"> Strip cryptographic signatures before re-protecting. </Card> </CardGroup>