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How to Sign a PDF on iPhone — Free in Safari, No App Needed

Signing a PDF on iPhone used to mean downloading an app, creating an account, or paying for Adobe Sign or DocuSign. None of that is necessary. PDFWix runs directly in Safari — open the website, upload your PDF, draw your signature with your finger or type it, position it on the page, and download the signed document. No app installs to your iPhone. Your file never leaves your device. Takes under a minute.

How to Sign a PDF on iPhone — Free in Safari, No App Needed

Sign a PDF on iPhone free in Safari — draw, type or upload your signature and place it anywhere. No app install, no DocuSign, no Adobe. Works on any iOS.

Tip: signing with Apple Pencil or finger

On iPhone or iPad, draw your signature directly on the touch screen — finger drawing works fine, but a stylus produces noticeably cleaner lines. Pinch-zoom to position the signature exactly on the dotted line, then tap Download. The signed PDF flattens the signature into the page so it prints and renders correctly everywhere, including on Windows, Android and inside email previewers. PDFWix signatures meet ESIGN and eIDAS simple-electronic-signature requirements, which is sufficient for engagement letters, NDAs and most commercial contracts.

How it works

  1. Open Sign PDF — Open Safari on your iPhone and go to pdfwix.com/sign-pdf. No account required.
  2. Upload your PDF — Tap 'Select file' and pick your PDF from Files, iCloud Drive, Google Drive, or email attachments.
  3. Add your signature — Tap 'Add Signature' and choose Draw, Type, or Upload. Rotate to landscape for more space when drawing.
  4. Place and resize — Tap on the page to place your signature, drag to reposition, and pinch to resize.
  5. Download and share — Tap Download. The signed PDF saves to your Downloads folder in the Files app.

Frequently asked questions

How do I sign a PDF on iPhone for free?

Open pdfwix.com/sign-pdf in Safari on your iPhone. Upload your PDF, draw or type your signature, place it on the page, and download the signed document. Free, no app install, no account required.

Can I sign a PDF on iPhone without installing an app?

Yes. PDFWix runs in Safari — no app download needed. iOS Markup (built into every iPhone) also lets you sign PDFs without any app install, though it has fewer options for signature style and placement.

Is signing a PDF on iPhone legally valid?

Yes. Electronic signatures created on iPhone are legally binding in most jurisdictions under the US ESIGN Act (US), eIDAS (EU), and equivalent laws. For regulated industries or high-value transactions, check whether a certified digital signature is required.