How to Sign a PDF on Android Free — No App Required
Fastest method: Open DocMint Sign PDF in Chrome on your Android phone, draw your signature with your finger, and download the signed PDF — free, no app, no signup.
Method 1: DocMint in Chrome (No App — Recommended)
Works in Chrome, Firefox, or Samsung Internet on any Android device. No installation, no signup.
- Open Chrome on your Android device
- Go to DocMint Sign PDF
- Tap the upload area and select your PDF
- Tap Add Signature
- Choose Draw and sign with your finger on the touchscreen
- Drag the signature to the correct position
- Tap Save and download the signed PDF
Tip for a better signature:
Use a stylus or your fingertip slowly for a cleaner signature. You can also type your name and choose a signature font if you prefer a typed signature.
Method 2: Adobe Acrobat Reader for Android (App)
Adobe Acrobat Reader is free on Android and supports electronic signatures.
- Install Adobe Acrobat Reader from the Play Store
- Open your PDF in Acrobat Reader
- Tap the pencil icon → Fill & Sign
- Tap the signature icon and draw your signature
- Tap where you want to place it on the document
- Save and share the signed PDF
Note: Adobe Acrobat Reader is free for basic signing. Advanced features require an Adobe subscription.
Method 3: DocuSign for Android (App)
DocuSign is the industry standard for legally binding electronic signatures.
- Install DocuSign from the Play Store
- Create a free account (required)
- Upload your PDF and add signature fields
- Sign and send
Note: DocuSign free tier allows 3 signature requests per month. Paid plans start at $10/month.
Method 4: Samsung Notes / S Pen (Samsung Devices)
If you have a Samsung Galaxy device with an S Pen, you can annotate and sign PDFs directly in Samsung Notes or the built-in PDF viewer.
- Open the PDF in Samsung's built-in PDF viewer
- Tap the pen icon to enter annotation mode
- Use the S Pen to draw your signature
- Save the annotated PDF
Signature Types You Can Use on Android
- Drawn signature — draw with your finger or stylus (most personal)
- Typed signature — type your name in a signature font
- Image signature — upload a photo of your handwritten signature
- Initials — add initials to multiple pages quickly
Is an Electronic Signature on Android Legally Valid?
Yes. Electronic signatures are legally binding in most countries:
- United States: ESIGN Act and UETA
- European Union: eIDAS Regulation
- United Kingdom: Electronic Communications Act
- Australia: Electronic Transactions Act
For high-value contracts or regulated industries, consider a qualified electronic signature (QES) with identity verification.
FAQ
Can I sign a PDF on Android for free?
Yes. DocMint lets you sign PDFs directly in Chrome or any Android browser — free, no app download, no signup required.
Is an electronic signature on Android legally valid?
Yes. Electronic signatures created with intent to sign are legally binding under the ESIGN Act (US), eIDAS (EU), and equivalent laws in most countries.
Can I draw my signature on Android?
Yes. DocMint's sign tool lets you draw your signature with your finger on the touchscreen, type it, or upload an image of your signature.
Do I need to install an app to sign PDFs on Android?
No. DocMint works entirely in your Android browser (Chrome, Firefox, Samsung Internet). No app download required.
What Android apps can sign PDFs?
Adobe Acrobat Reader, DocuSign, and Xodo are popular Android apps for signing PDFs. However, DocMint works in your browser without any installation.