To sign a PDF on your phone, open Sign PDF in ProperPDF, choose the document, draw your signature with your finger (or pick one you saved before), place it on the page, resize it and save. Signing happens on the device, offline and without an account. It's a Pro tool on iPhone, iPad and Android. This adds a drawn signature to the page; it isn't a certificate-based digital signature.
| iPhone and iPad | Pro |
|---|---|
| Android | Pro |
| Works offline | Yes |
| Files uploaded | No, processing happens on the device |
| Account needed | No |
| Requires | iOS 17 or later on iPhone and iPad; Android 8.0 or later |
How to sign a PDF in ProperPDF
- Open ProperPDF and tap Sign PDF.
- Select the document.
- Draw your signature, or choose a saved one.
- Tap the page where it belongs, then move and resize it.
- Save a signed copy and check every page before sending.
Drawn signature vs digital signature
ProperPDF places an image of your handwritten signature on the page, which is what most forms, leases and permission slips ask for. Some legal and government processes need a certificate-based digital signature instead, which tools like Foxit PDF Editor's paid plan create. ProperPDF doesn't.
Fill first, then sign
If the document is a form, complete the fields with Fill PDF first, then add your signature.
Questions
Is signing a PDF free in ProperPDF?
No. Sign PDF is a Pro tool on both iPhone and Android.
Can I reuse my signature?
Yes. On iPhone you can pick a signature you created earlier instead of drawing it again.
Is my signature uploaded?
No. The signature and the document stay on your phone.