Sign PDFs on iPhone

Sign any PDF document on your iPhone directly in Safari or Chrome — no app to download, no account required. Use your finger to draw your signature or type your name with a handwriting font.

No app neededWorks in SafariDraw with fingerGDPR-compliant

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How to Sign a PDF on iPhone Without Installing an App

Most PDF signing apps from the App Store 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 Safari and processes your PDF locally on your iPhone. No installation, no account, no upload.

Step by Step: Sign a PDF on iPhone

  1. Open Safari or Chrome on your iPhone and navigate to SigPDF
  2. Tap the upload area to select a PDF from Files, iCloud Drive, email, or Google Drive
  3. Draw your signature with your finger, type your name, or upload a signature image
  4. Tap on the document to place your signature — pinch to resize or drag to reposition
  5. Add text fields, dates, or initials as needed
  6. Tap Download to save the signed PDF to your iPhone

Why No App Is Needed

PDF signing apps from the App Store have a fundamental drawback: they require storage on your iPhone, request permissions, and typically upload your documents to their cloud. SigPDF is a web-based tool — no storage space used, no app permissions, and your documents never leave your device. You can even sign offline once the page has loaded.

Optimized for iPhone Touch

SigPDF's signature pad is specifically designed for touchscreens. The drawing canvas captures smooth, natural-looking strokes even when signing quickly with your finger. For a more precise signature, use an Apple Pencil on iPad. The interface scales automatically to any iPhone screen size, from iPhone SE to iPhone 16 Pro Max.

Privacy and Legal Validity

SigPDF processes your PDF entirely within Safari on your iPhone. No upload to external servers — 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 iPhone without downloading an app?
Yes. SigPDF is a web-based tool that runs entirely in your iPhone's browser. There is nothing to install from the App Store. Open SigPDF in Safari or Chrome, upload your PDF, draw or type your signature, and download the signed document.
Does SigPDF work with Safari on iPhone?
Yes. SigPDF is fully compatible with Safari on all iPhone models running iOS 15 or later. It also works in Chrome, Firefox, and any other browser available on iOS.
Is my PDF uploaded to a server when I sign on iPhone?
No. SigPDF processes your document entirely within your iPhone's browser. Your PDF never leaves your device, ensuring complete privacy for sensitive documents like contracts, legal agreements, and financial forms.
Can I use my finger to draw a signature on iPhone?
Yes. SigPDF's signature pad is optimized for touch input. Draw your signature with your finger on the iPhone screen, and the tool captures smooth, natural-looking strokes. You can also type your name or upload a signature image instead.
Does SigPDF work on iPad too?
Yes. SigPDF works identically on iPhone and iPad in Safari, Chrome, and any other browser. The larger iPad screen gives you more space for the signature drawing pad, making handwritten signatures even easier.
Can I sign a PDF offline on iPhone?
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 an iPhone-signed PDF legally valid?
Yes. Legal validity depends on intent and authentication, not the device used. An electronic signature created on iPhone with SigPDF is legally recognized under the US ESIGN Act, EU eIDAS Regulation, and equivalent laws in most countries.

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