Password Protect PDF

Subscribers to Adobe Acrobat Premium or Adobe Acrobat Pro DC can password protect PDFs by setting a document open password.

When you create a password for a PDF, note the following:

To password protect a file from within an open PDF or from any file list:

  1. Tap overflowicon

  2. Tap protecticon

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  1. Enter a password and confirm it. Use only supported characters.

  2. Tap Set Password.

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Supported characters

When you create a password to password-protect a PDF, you must only use letters, numbers, and the supported characters listed below. Passwords with unsupported characters show an error dialog.

Supported characters: !, “, #, $, %, &, ‘, (, ), *, +, ,, -, ., /, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, :, ;, < , =, > , ?, @, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z, [, \, ], ^, _, `, a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z, {, |, }, ~

Opening a protected file

To open a password protected file, you must know the password.

Note

There is no way to retrieve a forgotten password.

  1. Open a protected file.

  2. Enter the password.

  3. Tap OK.

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