Skip to content

How to Sign a PDF on an iPhone

Draw your signature with a finger right in Safari below — or use the built-in Markup. Both are free; the differences are explained after the tool.

Add a PDF to sign

or drag and drop a file here

Signing in Safari (no install)

  1. Tap Choose file above and pick the PDF from Files or iCloud Drive.
  2. Draw your signature with a finger in the signature box — landscape orientation gives you more room — and tap Use this signature.
  3. Pick the page, tap the preview where the signature should go, and adjust its width with the slider.
  4. Tap Sign PDF, then Download → Save to Files.

The document and your signature never leave the phone — both are processed in the browser tab. Nothing is stored after you close it, which also means the site never keeps a copy of your signature.

The built-in alternative: Markup

iOS can sign PDFs natively: open the PDF in Files, tap the pencil icon, then + → Add Signature. Markup is genuinely good — and it remembers your signature for next time. Note that the saved signature lives on the device and syncs through iCloud; if you'd rather not have a stored signature at all, the browser tool above keeps nothing. Markup is also the better choice when you need to fill many fields in one document.

Is this a legal signature?

Both methods place a drawn image — neither is a certificate-based digital signature. For everyday paperwork that's usually fine; for regulated documents, use a dedicated e-signature service. More on this on the main Sign PDF page.

Sign PDFs on other devices