Sign PDF on Android

Sign PDF on Android.

Need to sign a contract on your Samsung, Pixel, or Android device? Learn the easiest way to add your signature without downloading paid apps.

Sign on AndroidConvert PDF →

No account needed · zero uploads, verifiable in DevTools

—Works on Chrome, Samsung Internet & Firefox
—No registration or Google Play installs
—Sign with touch, stylus, or typed text
—100% private WebAssembly processing
—Download signed file instantly
privapdf.net/convert● SecurePDFcontract.pdf2.4 MBWASMYour browserlocalDOCXcontract.docx1.9 MBConverted in 1.8 s0 bytes sent to any server↓SaveNO SERVER

Step-by-Step: How to Sign a PDF on Android

Android devices don't have a universal built-in signature tool like Apple's Markup, but signing is still quick and free. Here is the easiest way to sign a PDF on any Android smartphone or tablet.

Signing via your Mobile Web Browser:

  1. Launch Google Chrome or your preferred browser on Android.
  2. Go to the PrivaPDF Sign PDF Tool.
  3. Tap to select your document from your downloads or local storage.
  4. Draw your signature using your finger or stylus in the canvas.
  5. Tap to place, resize, and save. Download the signed file.

Because our tool operates client-side using WebAssembly, the PDF never leaves your phone, ensuring 100% data compliance and confidentiality.

Don't trust us.
Verify it yourself.

Open DevTools → Network while converting. You'll see zero outbound requests. Every byte stays inside your browser tab.

—Works offline — no internet connection required
—Nothing is uploaded — ever
—Designed for sensitive documents
ZERO OUTBOUND CALLS
ElementsConsoleNetworkSources
FilterAll · XHR · JS · Wasm
NameStatusTypeSize
converter.worker.js200script48 kB
pdf.worker.wasm200wasm312 kB
✓ No requests to external servers
Powered byWebAssembly·Web Workers·pdf-lib·mammoth.js·Service WorkerAll open source · auditable in DevTools

Common questions

How do I sign a PDF on Android for free?

Open your web browser, navigate to PrivaPDF, drop your PDF, draw your signature with your finger, and download.

Can I sign using Google Drive on Android?

Yes, Google Drive allows basic drawing on PDFs, but a dedicated signing tool like PrivaPDF makes it easier to position, resize, and flat-embed visual signatures.

Is my file uploaded to a server?

No. All processing happens entirely in your browser using WebAssembly. Your file never leaves your device.

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