How to sign a PDF on Android without an app

Android has no built-in markup tool for PDFs, so signing one usually means the Play Store, an app, an account and an upload. It does not have to. Open this in Chrome, pick the PDF out of Downloads, Drive or a Gmail attachment, sign it with your finger, and the signed file lands back in Downloads. The tab is the app.

Sign PDF online → · Free PDF Signer

What you can do

How to sign a PDF on Android without an app

  1. Open the signer in Chrome, Samsung Internet or Firefox on your phone.
  2. Tap to choose the file, from Downloads, Google Drive, or straight out of an email attachment.
  3. Sign with your finger or a stylus. Pinch to zoom in on the line first, which makes the signature look like your signature.
  4. Tap seal, and the signed PDF saves back to your phone ready to send.

Ready? Sign PDF online now, free, no signup, and your file is auto-deleted after an hour.

Frequently asked questions

Can I sign a document on my phone without an app?

Yes. Everything here runs in the mobile browser. That is worth more than it sounds on a phone with no storage left, or a work device where you cannot install anything.

My signature looks wrong drawn with a finger.

Zoom in before you draw. A signature drawn across a two inch view of a page is a scribble; drawn at full zoom it looks like you signed it. You can also type your name in a handwriting face if a drawn one will not behave.

Is it free to sign a PDF online?

Yes. You can fill in and sign a PDF for free with no account, you only pay when you download a finished document ($1.50 per document pay-as-you-go, or unlimited on any paid plan). sign a PDF on Android works the same way.

Is signing a PDF online secure?

Yes. Files are uploaded over 256-bit TLS, processed in your browser session, and automatically deleted after one hour. Each signature is bound to the document with a SHA-256 tamper-evident seal, so any later edit is detectable.

Are electronic signatures legally binding?

Yes, electronic signatures are legally binding for ordinary business documents in 190+ countries under the US ESIGN Act and UETA, the EU eIDAS Regulation, and equivalent laws worldwide. Courts look for intent, identity and integrity, all of which PDF Verified records.

Do I need to install anything?

No. Everything runs in your browser on desktop or mobile, no app, plugin or download required.

What PDF Verified is, and what it is not

Electronic signature law is settled in broad terms and specific in the details. The ESIGN Act, UETA, eIDAS and their equivalents recognise electronic signatures across more than 190 countries, and what decides a particular case is intent to sign plus evidence connecting the signature to the signer, which is what the audit certificate records. Certain document types carry their own formalities wherever you are: deeds, wills, some property instruments, and anything requiring a witness or a notary. Sign only what you are authorised to sign, since applying another person signature without their authority is forgery whatever tool is used.

PDF Verified is a tool for preparing, signing, stamping and checking documents. It is not a law firm, a compliance service or a forensic examiner, and nothing here is legal, financial or compliance advice. Requirements differ by country, by document type and by the party asking, so check what applies to your document before you rely on it, and take advice where the document matters. You are responsible for the documents you create, sign and send, and for having the authority to do so: signing or stamping in somebody else name, or as an organisation you do not represent, is forgery whatever tool is used. To the extent the law allows, we accept no liability for how a document made with this tool is used or relied on. The full position is in our terms of service.

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