How to Sign a PDF on Your iPhone or Android Phone

If the PDF arrived by email, open the attachment and use the share button to save it to Files (iPhone) or tap download (Android). On iPhone it will usually land in Files, in the Downloads folder or On My iPhone. On Android it goes to the Downloads folder. PDFs from WhatsApp, Slack or Teams can be saved the same way.

1. 1

   Open Sign PDF and choose your file

   Visit Sign PDF in your browser, tap the upload area and pick the document from Files or Downloads. It opens full screen.

2. 2

   Create your signature

   Tap Signature, then Draw and sign with your finger. Turning the phone sideways gives you more room. You can also Type your name in a handwriting style, or Upload a photo of your signature on paper; the white background is removed automatically.

3. 3

   Place it

   Tap the spot on the page where the signature belongs, then drag and resize it to fit the line. Use the + and - zoom buttons if the signature line is small.

4. 4

   Fill in the rest

   Add today's date with Date, type your name or address with Text, and use the check mark for tick boxes. Everything you type is saved as real text.

5. 5

   Download and send

   Tap download. On iPhone, Safari saves the signed file to Files, in Downloads. From there, share it back by email or chat.

• Sign slowly and a little larger than you would on paper; the signature is scaled down when you place it.
• Use a stylus if you have one; it gives a more natural line than a fingertip.
• Signing many pages? Place your initials once, select them and press All pages to copy them to the same spot on every page.
• Your signatures are remembered only while the tab is open, so you can reuse them across several documents in one session.

What you create is a simple electronic signature. In many countries, including under the US ESIGN Act and the EU eIDAS regulation, simple electronic signatures are legally recognized for most everyday agreements such as rental forms, consent forms, offer letters and delivery notes. Some documents, such as certain property, court or notarized papers, require a qualified signature with identity verification, which only a certified e-signature provider can give. If in doubt, ask the person who sent you the document what they accept.

Photograph the pages flat, in good light, turn the photos into a PDF with JPG to PDF, then sign that PDF as above. To change text in the document rather than just sign it, use Edit PDF.