Type a signature, merge pages, and fill forms. Your files stay on this phone.
Knox PDF is a PDF reader and editor for Android. Files you import and create stay on this phone. Mark a page, fill a form, or make a PDF from photos or the camera.
Read a PDF:
Import a PDF from your phone. If you know the password, you can open a protected PDF, search text that is already in the file, and copy a passage. A locked file stays read-only. The app will not edit it or remove the password.
Mark up a page:
Highlight, draw, add a note, or place a line, box, or oval, then undo or redo. Premium adds typed text, the stamps Draft, Confidential, and Approved, a typed signature, and a picture placed on the page.
Make a PDF:
Start a blank page, import a file you already have, or build one from photos. Camera to PDF saves a photo as a page in your library on this device. That is a picture page, not a cleaned-up document scan.
Organize pages:
Rotate, delete, reorder, duplicate, or insert a blank page. Premium can merge another PDF onto the open file, save one page as its own file, or save a page range. Premium can also place a watermark, header, or footer on every page.
Fill a form:
When a PDF already has text fields or checkboxes, the app lists them so you can fill and save. It does not add new fields, and it leaves dropdowns and other field types unchanged.
Cover part of a page:
Premium lets you mark areas and flatten that page into an image, so covered text is no longer selectable there. That replaces the page you marked. It is not a certificate, and it does not look for other copies of the file.
Share:
Share the file, share the current page as an image, or share extractable text as a plain text file.
On this phone:
The library lives in the app on this device. Those files are not uploaded to a cloud library. A shared phone can still open the app, so keep sensitive files off phones you do not control. Opening a saved file does not need an account.
Limits:
Search and copy need text that is already in the file. The app does not run optical character recognition, and it does not convert a PDF to Word or Excel. A typed signature is text on the page, not a cryptographic certificate.
Premium:
Premium is an optional subscription.
Can I edit a PDF without uploading it?
Yes. Files you import and create stay on this phone. Editing does not send them to a cloud library.
How do I turn photos into a PDF?
On Home, use Photos to PDF or the camera button. The new file is saved on this device.
How do I sign a PDF?
Open the page, choose Sign, and type the name. That text is placed on the page. It does not apply a digital certificate.
How do I merge PDFs?
Open the first file, go to Edit, and add pages from another file. Merge is included with Premium.
Can I fill out a PDF form?
Yes, if the form already has text fields or checkboxes. The app does not create those fields for you.
What happens with a password-protected PDF?
If you know the password, you can read, search, and copy. A locked file cannot be changed.
Novedades
What’s new (version 1.0)
• Read, mark, and organize PDFs on this phone. Import a file, start from a photo or the camera, search text, and fill text fields and checkboxes
• Merge, split, a drawn or typed signature, scan filters, auto size