RapidHow to Sign a PDF on Android — Free, No App Needed
Draw, type, or upload your signature onto any PDF in Chrome — no app download, no account, no upload to any server.
⚠️ Always use a copy of your document, never the original. Keep your original file safe.
How to sign a PDF on Android is a question that keeps coming up every time someone gets a contract, lease agreement, or form sent as a PDF. Most e-signature apps require a subscription. Here are the free methods, starting with the one that works on any Android device.
Method 1: Use RapidTools in Chrome (Fastest, Most Private)
No app install, no account. Works on any Android phone or tablet with Chrome.
- Open Chrome on your Android device.
- Go to rapidtools.online/sign-pdf.
- Tap the upload area and select your PDF — from Google Drive, Downloads, or local storage.⚠️ Always use a copy of your document, never the original. Keep your original file safe.
- Tap the Signature tool in the toolbar.
- Choose your signature method:
- Draw — sign with your finger on the touchscreen
- Type — enter your name, displayed in a handwriting-style font
- Upload — take a photo of your handwritten signature to use as an image
- Drag the signature to the correct position on the page. Pinch to resize.
- Tap Download. The signed PDF saves to your Downloads folder.
Method 2: Google Drive Annotation (Built-In, Basic)
If your PDF is already in Google Drive, there is a quick built-in option — though it is more limited than a dedicated signing tool.
- Open the Google Drive app and find your PDF.
- Tap to open it, then tap the pencil icon (edit) in the bottom right.
- Tap the pen/annotation icon in the toolbar.
- Draw your signature directly on the page.
- Tap the tick/checkmark to save.
Limitation: This adds a freehand drawing annotation, not a proper signature. The result looks the same visually, but there is no signature field metadata. For most everyday documents it is fine; for legally sensitive documents, use Method 1.
Method 3: Samsung Notes / Manufacturer PDF Tools
Samsung, Xiaomi, and some other Android manufacturers include a PDF annotation tool in their built-in apps. On Samsung:
- Open the PDF in Samsung My Files or the stock PDF viewer.
- Tap the Edit or Annotate icon.
- Use the pen tool to draw your signature.
- Save the file.
Availability varies by device and Android version. If your device has this option, it works without internet. For devices without a built-in PDF annotator, Method 1 is the fastest solution.
Method Comparison
| Method | App needed? | Internet? | Draw/Type/Upload? | Privacy |
|---|---|---|---|---|
| RapidTools (Chrome) | No | Yes | All three | Local only |
| Google Drive annotation | Drive (pre-installed) | Yes | Draw only | Stored in Drive |
| Samsung/manufacturer tools | Built-in (some devices) | No | Draw only | Local only |
How to Send the Signed PDF from Android
After downloading the signed PDF to your Downloads folder:
- Email: Open Gmail → compose a new email → tap the attachment icon → navigate to Downloads → select the file.
- WhatsApp / Telegram: Open the chat → tap the attachment icon → choose Document → navigate to Downloads → select the file.
- Google Drive: Open the Drive app → tap + → Upload → select from Downloads. Then share the Drive link.
- Files app: Long-press the file → Share → choose any app.
For other devices and methods, see how to sign a PDF. On Android, you can also read how to fill out a PDF form on Android.
Frequently Asked Questions
How do I sign a PDF on Android for free?
Open rapidtools.online/sign-pdf in Chrome. Upload your PDF, draw or type your signature, position it, and tap Download. No app, no account needed.
Can I sign a PDF on Android without an app?
Yes. RapidTools works entirely in Chrome — no app install. Google Drive's built-in annotation is another no-install option, though more basic.
Is a finger-drawn signature legally valid on Android?
Yes, for most documents. Electronic signatures are legally recognised in the US (ESIGN Act), EU (eIDAS), UK, Canada, and Australia. Exceptions include wills, property deeds, and some court documents.
How do I add initials to multiple pages on Android?
In RapidTools, after placing your signature, navigate to additional pages using the page controls and add initials or a second signature to each page that requires it.
Where does the signed PDF save on Android?
It saves to your Downloads folder. Access it via the Files app or any file manager. From there you can share it via any app.