Tambah Kata Laluan pada PDF
Sulitkan PDF anda supaya hanya boleh dibuka dengan kata laluan yang anda tetapkan.
Cara ia berfungsi
1. Muat naik PDF anda. 2. Taip kata laluan dan sahkannya. 3. Muat turun — fail itu disulitkan (AES-256) supaya hanya boleh dibuka dengan kata laluan tersebut.
Adakah kata laluan saya dihantar ke mana-mana?
Tidak — penyulitan berlaku sepenuhnya dalam pelayar anda. Fail dan kata laluan anda tidak sesekali meninggalkan peranti anda.
Bagaimana jika saya terlupa kata laluan?
Tiada cara untuk memulihkannya — penyulitan ini sebenar, jadi kata laluan yang terlupa bermakna fail itu tidak boleh dibuka oleh sesiapa, termasuk kami. Simpan di tempat yang selamat.
Penyulitan apa yang digunakan?
AES-256, kekuatan penyulitan piawai PDF semasa, melalui enjin qpdf sumber terbuka yang digunakan secara meluas dan berjalan dalam pelayar anda.
Does this work on a mobile browser?
Yes — it's a regular web page, not an app, so it works the same way in a mobile browser as on desktop. Tap to pick the file, set a password, and download the encrypted result — the encryption still happens entirely on your device.
Does this restrict printing or copying, not just require a password to open?
No — it's a single password that's required to open the file. Once someone has entered it, they can print, copy, and edit like normal; there's no separate owner password or permission controls that limit what an already-authenticated reader can do. Worth knowing anyway: those "disable printing/copying" options other tools offer are only honored by well-behaved PDF readers — anyone can strip them by printing the file to a new PDF.
What makes a good password for this?
Something reasonably long that isn't a guessable word — not your birthday, not "password123". We only require 4 characters minimum so we don't block anyone, but since there's no permission system backing this up, that password is the only thing standing between someone and the file. Treat it like a real password.