How to sign a PDF on an iPhone without an app

You don't need an App Store download to sign a PDF on an iPhone. Open the free signer in Safari, load the PDF, draw your signature with your finger, and save the signed file to Files. Everything runs in the browser, the document is never uploaded to a server.

Last verified: July 17, 2026

Sign a PDF free, no upload

Sign a PDF on your iPhone in four steps

  1. 1

    Get the PDF into Files

    If the PDF arrived by email or message, tap the attachment, then use the Share button → Save to Files. From Safari downloads it is already in Files > Downloads.

  2. 2

    Open the free signer in Safari

    Go to the signer and tap Choose file, the iOS file picker opens directly into Files. Pick your PDF; it loads on the phone without being transmitted.

  3. 3

    Add your signature

    Draw with your finger (pinch to zoom first for a cleaner line), type your name in a handwriting style, or photograph your signature on paper with the camera. Drag and resize it into place.

  4. 4

    Download the signed PDF

    Tap download, Safari saves the flattened PDF to Files > Downloads. Share it back by email or any app from there.

iPhone specifics worth knowing

  • iOS Markup can also sign, with limits

    iOS has a built-in Markup tool (in Files and Mail) that draws a signature locally, and for a quick scribble it's fine. Its signature sits as a movable annotation rather than being flattened into the page, there are no typed or photographed styles, and saved Markup signatures sync through your device. The in-browser signer flattens the signature into the PDF and stores nothing.

  • Zoom before you draw

    The signature pad supports pinch-to-zoom pages; drawing after zooming in gives noticeably smoother strokes on a phone screen than drawing at full-page scale.

  • Works in airplane mode

    Once the page has loaded you can switch to airplane mode and still open, sign, and save your PDF, practical proof that the file never leaves the phone.

Frequently asked questions

Does the PDF leave my iPhone when I sign it this way?
No. The file is opened and signed by code running in Safari on the phone itself, and the signed copy is saved straight to Files. Nothing is uploaded, you can verify by signing in airplane mode.
Can I sign a PDF attachment directly from Mail?
Save it to Files first (tap the attachment → Share → Save to Files), then pick it in the signer. After signing, attach the downloaded file from Files > Downloads to your reply.
Do I need to create an account or install anything?
No. The free signer needs no App Store download, no account, and no email address. Open the page, sign, download, that's the entire flow.

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Sign a PDF free, no upload
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