How to Sign a PDF on Android in 4 Steps

By Elevate Mobile Group · Updated October 10, 2026

You do not need a printer or scanner to sign a document. You can sign a PDF directly on your Android phone in under a minute, add the date or initials, and send it back by email or chat.

Sign a PDF with PDF Reader

1. Open the PDF. Open PDF Reader: PDF Editor, Viewer. Every PDF on your phone is listed automatically. Tap the document.
2. Tap Edit. Choose the pen tool and pick a dark color such as black or blue.
3. Draw your signature. Zoom in on the signature line and draw your signature with your finger or a stylus.
4. Save and share. Save the document, then use Share to send it by email, WhatsApp, or another app.

Tips for a clean signature

• Zoom in before signing so your signature is smooth
• Use a stylus if you have one
• Add the date and your printed name with the text or pen tool
• Check every page that needs a signature or initials before sending

Is a signature drawn on a phone legally valid?

In many countries, including the United States under the ESIGN Act and the European Union under eIDAS, electronic signatures are legally recognized for most everyday documents. Some documents, such as certain wills or notarized forms, may require a different process. If you are unsure, ask the person or organization that sent you the document.

Need to fill forms too?

PDF Reader also highlights, underlines, adds notes, and converts Word, Excel, PowerPoint, and images to PDF. Everything works offline, and your documents stay on your device unless you share them.

Frequently asked questions

Can I sign a PDF on Android for free?

Yes. PDF Reader: PDF Editor, Viewer is free to download and lets you draw a signature on any PDF.

Do I need an internet connection to sign a PDF?

No. Signing and saving work offline.

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