How to Sign a PDF on iPhone Free
Add your signature to a PDF on iPhone. Use the built-in Markup tool or FixMyPDF — both free.
iPhone has two built-in ways to sign PDFs, plus FixMyPDF as a browser option.
Method 1: Files App (Built-In)
Open the PDF in Files. Tap the pen icon → Markup. Tap the + button → Signature. Draw your signature. Place and resize it. Tap Done → Save.
Method 2: Mail App
Receive the PDF as email attachment. Tap and hold → Markup. Sign. Tap Done → Reply (to send signed version back).
Method 3: FixMyPDF
Go to fixmypdf.in/tools/pdf-sign. Upload. Draw or upload signature. Position. Download.
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