Sign PDFs on Android

Sign any PDF document on your Android phone or tablet using Chrome, Samsung Internet, or any browser — no app to download, no account required. Draw with your finger or type your name.

No app neededChrome & Samsung InternetDraw with fingerGDPR-compliant

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How to Sign a PDF on Android Without an App

Android does not include a built-in PDF signing tool, which leads most people to download Play Store apps. Many of those apps upload your documents to their servers for processing — a privacy concern for sensitive contracts and legal documents. SigPDF works directly in your browser with no upload, no installation, and no account required.

Step by Step: Sign a PDF on Android

  1. Open Chrome, Samsung Internet, or any browser on your Android phone
  2. Navigate to SigPDF and tap the upload area
  3. Select a PDF from device storage, Google Drive, or recent downloads
  4. Draw your signature with your finger, type your name, or upload a signature image
  5. Tap on the document to place your signature — drag to reposition or pinch to resize
  6. Add text, dates, or initials on any page as needed
  7. Tap Download to save the signed PDF to your Android device

Samsung Galaxy and S Pen

On Samsung Galaxy Note and Galaxy S Ultra models, you can use the S Pen for an exceptionally precise, natural-looking signature. The S Pen's pressure sensitivity creates variable line widths — similar to signing with a real pen on paper. SigPDF detects the S Pen automatically with no extra configuration.

Privacy and Legal Validity

SigPDF processes your PDF entirely in your Android browser. No upload to any external server — fully GDPR-compliant. The resulting electronic signature is legally valid under the US ESIGN Act, EU eIDAS Regulation, and equivalent laws worldwide.

Frequently Asked Questions

Do I need to install an app to sign PDFs on Android?
No. SigPDF works directly in your Android browser — Chrome, Samsung Internet, Firefox, or any modern browser. There is no app to download from the Google Play Store. Open SigPDF in your browser and sign instantly.
Which Android browsers does SigPDF work with?
SigPDF works with all major Android browsers: Google Chrome, Samsung Internet, Mozilla Firefox, Brave, Opera, and Microsoft Edge. Any modern browser with JavaScript support will work.
Is SigPDF compatible with Samsung Galaxy phones?
Yes. SigPDF works on all Samsung Galaxy models — Galaxy S series, Galaxy A series, Galaxy Z Fold and Flip, and Galaxy Tab. It works in both Samsung Internet and Chrome. The S Pen on Galaxy Ultra models gives a particularly precise drawing experience.
Are my PDFs safe when signing on Android?
Yes. SigPDF processes your PDF entirely within your Android browser. Your documents are never uploaded to any server. Your sensitive files remain completely private on your device.
Which Android version does SigPDF require?
SigPDF works on Android 10 or later with any modern browser. This covers virtually all Android phones released in the last several years.
Can I share the signed PDF directly from Android?
Yes. After downloading, the signed PDF is saved in your Downloads folder. From there you can share it directly via Gmail, WhatsApp, Google Drive, Telegram, or any other app on your Android device.
Is an Android-signed PDF legally valid?
Yes. Legal validity of an electronic signature does not depend on the device or operating system. A signature created on Android with SigPDF is legally recognized under the US ESIGN Act, EU eIDAS Regulation, and equivalent laws worldwide.

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