Android guide
Sign a PDF on Android.
No app. No signup.
Chrome on Android handles PDFs well enough that you don't need Adobe Fill & Sign or any of the ad-heavy signer apps on the Play Store. Here's the minute-long route using your browser.
Open pdf2sign1. Save the PDF to Downloads
Wherever the PDF arrived — Gmail, WhatsApp, Telegram, Outlook, Signal — the flow is similar. Tap the attachment, then the Download icon (or the three-dot menu → Save). The PDF lands in Downloads, which every Android file picker can see.
On Samsung devices the Download icon is usually a downward arrow at the top of the PDF preview. On stock Android it's in the same spot.
2. Open pdf2sign in Chrome
Open Chrome (Samsung Internet, Firefox, Brave, and Edge all work equally well) and go to pdf2sign.app/sign. Tap the upload area. Android opens the system file picker — pick Downloads, then the PDF you just saved.
Chrome loads the PDF into the editor. The file stays on your phone; pdf2sign does all its work inside the browser tab. No upload.
3. Draw your signature full-screen
On Android, the signature pad opens full-screen so you have the whole display to draw on. If you're on a Samsung Galaxy Note, Tab S-series, or Fold with an S Pen, use it — the canvas reads pressure and draws just like a pen on paper.
If drawing isn't your thing, switch to the Type tab and pick a handwriting font (Dancing Script, Caveat, Great Vibes, Pacifico). Type your name, it'll render as a signature.
4. Place, resize, and download
Drag the signature onto the signature line. Pinch or drag the corners to resize. When it looks right, tap Download. Chrome saves the signed PDF to Downloads.
5. Share the signed PDF back
Open the Files app (or Google Files, or your phone's file manager). Find the signed PDF in Downloads. Long-press it and tap Share. Android's share sheet lets you send it via:
- Gmail — as a reply attachment
- WhatsApp / Telegram / Signal — drop into the conversation
- Messages (RCS / SMS) — attach as a PDF
- Drive / Dropbox / OneDrive — upload for long-term storage
- Nearby Share — beam to a nearby Android or Chromebook
Compared to the Play Store signer apps
The major PDF signer apps on Android (Adobe Fill & Sign, SignNow, SignEasy, Xodo) all have real strengths — audit logs, multi-party workflows, cloud sync — but they tend to want a signup, a subscription, or both. For the common case of "I just need to sign this one PDF and send it back," a browser-based tool is faster and doesn't keep any record of your document.
If you're handling high-value contracts with multiple parties and audit requirements, use a dedicated e-signature platform like DocuSign. For a freelance invoice, rental form, or consent sheet, pdf2sign is the right shape.
Frequently asked questions
Do I need to install an app to sign a PDF on Android?
No. pdf2sign runs in any modern Android browser — Chrome, Samsung Internet, Firefox, Brave, Edge. Nothing to install from the Play Store.
Does the Samsung S Pen work?
Yes. The signature canvas uses the Pointer Events API, which captures S Pen input including pressure levels on devices that support it. Draw naturally with the Pen for the best result.
Where does the signed PDF go?
Chrome saves it to your Downloads folder by default. You can access it from the Files app, Google Files, or the Downloads shortcut in most Android file managers.
My phone is from 2018 — will this work?
Almost certainly yes. The tool uses standard web APIs that have been in Chrome for years. If you can load Gmail in the browser, pdf2sign will load fine.
Can I sign a PDF I received in WhatsApp?
Yes. Tap the PDF in WhatsApp to open it, then tap the three-dot menu → Share → Save to Downloads (or use the Download icon). Switch to Chrome, go to pdf2sign.app/sign, and pick the file.
Does this work offline?
Once the page is loaded, yes. You can turn on airplane mode and still sign and download. Everything runs locally in your browser.