Sign any PDF document on your iPhone, Android phone, iPad, or tablet. No app to download — SigPDF works directly in Safari, Chrome, or any mobile browser. Draw with your finger or type your name.
No app needediPhone & AndroidDraw with fingerGDPR-compliant
Loading editor...
How to Sign a PDF on Mobile — No App Required
Most PDF signing apps from the App Store and Google Play upload your documents to their cloud servers for processing — a serious privacy concern for contracts, NDAs, and financial documents. SigPDF is different: it runs entirely in your mobile browser and processes your PDF locally on your device. No installation, no account, no upload.
Step by Step: Sign a PDF on Your Phone
Open Safari, Chrome, or any browser on your phone
Navigate to SigPDF and tap the upload area
Select a PDF from your device, cloud storage, or email attachment
Draw your signature with your finger, type your name, or upload a signature image
Tap on the document to place your signature — pinch to resize or drag to reposition
Add text, dates, or initials on any page as needed
iPad — Safari, Chrome; Apple Pencil supported for precise signatures
Android tablets — Chrome, Samsung Internet; S Pen supported on Samsung devices
Chromebooks — Chrome browser
Privacy and Legal Validity
SigPDF processes your PDF entirely within your mobile browser. No upload to any external server — fully GDPR-compliant. The resulting electronic signature is legally valid under the US ESIGN Act, EU eIDAS Regulation, and equivalent laws in the UK, Canada, and Australia.
Frequently Asked Questions
Can I sign a PDF on my phone without downloading an app?
Yes. SigPDF is a web-based tool that runs entirely in your mobile browser — Safari, Chrome, Firefox, or any other browser. There is nothing to install from the App Store or Google Play. Open SigPDF in your browser, upload your PDF, draw or type your signature, and download the signed document.
Which phones and browsers does SigPDF support?
SigPDF works on any modern smartphone or tablet. On iPhone: Safari, Chrome, Firefox. On Android: Chrome, Samsung Internet, Firefox, Brave, Edge. On iPad: Safari, Chrome. The tool is optimized for touch input on all screen sizes.
Is my PDF uploaded to a server when I sign on mobile?
No. SigPDF processes your document entirely within your mobile browser. Your PDF never leaves your device — no upload, no cloud storage, no third-party access. This makes it safe for sensitive contracts, legal agreements, and personal documents.
Can I draw my signature with my finger on a phone?
Yes. SigPDF's signature pad is fully optimized for touch. Draw your signature naturally with your finger on the touchscreen. You can also type your name with a handwriting font, or upload an existing signature image instead.
Does SigPDF work on iPad and Android tablets?
Yes. SigPDF works identically on smartphones and tablets in any browser. The larger screen on tablets gives you more space for the signature drawing pad, making handwritten signatures even easier — especially with an Apple Pencil or Samsung S Pen.
Can I sign a PDF offline on my phone?
Once the SigPDF page has loaded, the signing tool works entirely locally in your browser. You do not need an active internet connection to sign — useful when you have a weak signal or no Wi-Fi available.
Is a signature made on a phone legally valid?
Yes. Legal validity depends on intent and consent, not the device used. An electronic signature made on a phone with SigPDF is legally recognized under the US ESIGN Act, EU eIDAS Regulation, and equivalent laws in the UK, Canada, and Australia.