How to Sign a PDF on Android (Free, No App)
To sign a PDF on Android for free, open PDFYay in Chrome, tap Choose PDF and pick your file, then tap Signature in the bottom dock. Draw with your finger, type your name, or upload an image, tap Apply, place it on the page, and tap Download. No app or account needed.
Android has no built-in PDF signing tool, but you don't need to install one. Open PDFYay in Chrome (or any modern Android browser), tap Choose PDF and pick your file, then tap Signature in the bottom dock. Draw with your finger, type your name, or upload an image, place it on the page, and tap Download. The file never leaves your phone.
How do you sign a PDF on Android step by step?
To sign a PDF on Android, open PDFYay in Chrome, load your PDF with Choose PDF, and tap Signature in the bottom dock. Pick the Draw, Type, or Upload tab to make your signature, tap Apply, then tap the page to drop it in place. Tap Download to save. Here's the exact flow I use on my phone:
- Open the PDFYay signer in Chrome. Nothing to download.
- Tap Drop a PDF here or the Choose PDF button, then pick your file from Downloads, Drive, or Gmail.
- Tap Signature in the bottom dock. A pop-up slides up from the bottom of the screen with three tabs: Draw, Type, and Upload.
- On Draw, sign with your finger. Got it wrong? Tap Clear and try again. Or switch to Type to enter your name in a signature font, or Upload to add a saved signature image.
- Tap Apply, then tap the page where you want the signature. Drag to move it and use the corner handle to resize until it sits cleanly on the line.
- Add a Date stamp from the dock if the form needs one, then tap Download to save the signed PDF to your phone.
The dock also has Text for typing into blanks, plus Check and Cross stamps for tick-box fields. Two magnifier buttons zoom the page in and out, which helps a lot on a 6-inch screen. The signature you made stays loaded, so if the document needs your initials in three spots you just tap each one without redrawing.
A quick note on file pickers. When you tap Choose PDF, Android opens its own document picker, and the exact look depends on your phone. On a Pixel you'll see Recent, then Drive and Downloads in the side menu. On Samsung it's the My Files picker. Either way, point it at the PDF you saved and it loads straight into the editor.
Which Android browser works best for signing?
Chrome is the safe default on Android, and it handles the PDFYay signer fine. Samsung Internet, Firefox, and Edge also work because the editor is a standard web page, not a Chrome-only feature. Pick whichever browser you already use to open downloads. There's no add-on or extension to install in any of them.
If a PDF opens in Google Drive's built-in viewer instead of the signer, that's normal. Save or download the file first, then open it from your browser. The viewer is for reading, not editing, so it won't show the signing dock.
One thing to watch on Android: some browsers ask whether to "open" or "download" a PDF link. Choose download. Opening can hand the file to a separate PDF app that can't sign, while downloading drops it into a folder the signer can reach through Choose PDF. If your phone is set to auto-open PDFs in a specific app, you can clear that default in Settings under Apps.
How do you sign a Gmail attachment on Android?
To sign a Gmail attachment, tap the PDF in the email, then tap the download icon to save it to your phone. Open PDFYay in Chrome, tap Choose PDF, and pick the file from Downloads. Sign it, tap Download, and use Android's share sheet to send the signed copy back as a reply. Gmail's preview can't edit a PDF, so the download step is the key.
- Tap the attachment, then the download arrow to save it locally.
- Open the signer and load the file with Choose PDF.
- Add your signature, the date, and any text fields.
- Tap Download, then share the signed file straight back into Gmail.
For the same flow on an iPhone, see how to sign a PDF on iPhone.
Browser signer vs other Android options
A browser signer keeps the file on your phone and skips installs and sign-ups. Drive's PDF viewer can't edit, and most app-store signers want an account or push a paid tier after a free trial. Here's how the common Android paths compare:
| Method | Install? | File leaves phone? |
|---|---|---|
| Browser signer | No | No |
| Drive viewer | No | Can't sign |
| App-store signer | Yes | Often |
| Desktop + Acrobat | Yes | Sometimes |
If you'd rather avoid Adobe's tools entirely, how to sign a PDF without Acrobat covers the free routes in more detail. The short version: the browser route wins on Android because it's the only one that signs the file without an install and without pushing it off your device.
App-store signers aren't bad, but they add friction. You grant storage permissions, sit through an onboarding screen, and a lot of them watermark the output or cap free exports unless you start a trial. For a single contract that's a lot of overhead. The browser path gets you to a signed file in under a minute, and there's nothing left on your phone afterward except the PDF.
Is signing a PDF on Android legally valid?
Signing a PDF on Android is legally valid in most cases the same way a typed or drawn e-signature is on any device. According to the U.S. ESIGN Act of 2000, electronic signatures hold the same legal standing as ink signatures for most agreements. In the EU, eIDAS sets the equivalent framework. The method (phone, drawn, or typed) doesn't change that.
A few documents still need wet ink or notarization, like some wills, deeds, and certain court filings. Those are narrow exceptions, and they vary by jurisdiction. When a document spells out a signing method, follow what it says. For everyday contracts, NDAs, consent forms, and approvals, a signed PDF from your phone is normally enough.
Tips for a clean signature on a phone
- Turn your phone sideways for a wider canvas before you draw.
- Pinch to zoom, or use the dock's magnifier, to place a signature precisely on a small form field.
- Prefer the Type tab on tiny screens. A typed signature font reads cleaner than a finger scrawl.
- On a foldable or tablet you get a bigger drawing area, and the layout adapts so the dock and page stay easy to reach folded or unfolded.
Need to fill in name, date, or address blanks too? See how to add text to a PDF for free. And if you're weighing your options first, how to sign a PDF for free lays out the no-cost methods side by side.
The best part of doing this in the browser is what doesn't happen: your contract isn't uploaded anywhere, and you never make an account. Open it, sign it, download it, done. That's the whole point of doing it on the phone you already have in your hand.
Frequently asked questions
Can I sign a PDF on Android without installing an app?
Yes. Android has no built-in PDF signing tool, but any modern browser can do it. Open PDFYay in Chrome, load your PDF, tap Signature, then draw, type, or upload your signature and tap Download. There's nothing to install and no account to create, and the whole thing runs as a normal web page.
Is it safe to sign a PDF in my phone's browser?
It's safe when the signer works on-device. PDFYay renders and edits your PDF locally in the browser, so the file isn't uploaded to a server. That matters for contracts and IDs. According to the U.S. ESIGN Act of 2000, electronic signatures carry the same legal weight as handwritten ones for most documents.
How do I sign a Gmail attachment on Android?
Open the Gmail message, tap the PDF attachment, and use the download icon to save it to your phone. Then open PDFYay in Chrome, tap Choose PDF, and pick the file from Downloads. After you sign and tap Download, use Android's share sheet to attach the signed copy to a reply.
Does signing a PDF on Android keep the file on my phone?
Yes, with an in-browser signer it does. PDFYay processes the PDF inside your browser tab, so the document never leaves your device. The signed copy saves straight to your phone's Downloads folder. You can then share it through Gmail, Drive, or any app using the standard Android share sheet.
Can I type my signature instead of drawing it on a small screen?
Yes. In the signature pop-up, tap the Type tab, enter your name, and pick from the signature fonts shown as preview tiles. Typing is easier than drawing on a phone screen and reads more cleanly. If you have a saved signature image, the Upload tab lets you drop that in instead.