Sign PDF
Sign a PDF on iPhone — Without Printing or Scanning
iOS Markup (the built-in signature feature in Mail and Files) is fine for quick personal stuff but limited if you need to position the signature precisely, sign a multi-page contract, or share the signed PDF in a specific way. Our browser-based signer works in Safari on iPhone, lets you draw with your finger on the canvas, and outputs a clean PDF ready to email or upload.
- Works in your browser — no install
- Files private and isolated to your workspace
- Free tier covers most everyday use
What you should know
Works in Safari, no app required
Open mypdfkitty.com in Safari, upload the PDF, and sign. No App Store install, no Apple ID prompt, no in-app purchase upsell. The page is touch-optimized for finger drawing.
iOS Markup vs. our signer
iOS Markup: fastest if you just need a quick signature on a one-page PDF you're emailing back. Our signer: better if you need to place the signature precisely, sign multi-page documents with multiple fields, or want a typed signature in script style.
How well finger drawing works
Surprisingly well on modern iPhones — the touch sampling rate is high enough that signatures look natural. iPad with Apple Pencil is even better. If you want a perfectly clean signature, type it instead and we'll render in italic script.
Privacy on mobile
Same as desktop — files are uploaded to your private workspace, encrypted in transit and at rest, and auto-deleted on free plans after processing. Your signature drawing never leaves the page until you click submit.
Tips that actually help
- Hold your iPhone landscape — the signature canvas is wider, so your signature has more room to look natural.
- Use the Apple Pencil if you have an iPad and want a perfect signature.
- If iOS auto-zooms and your signature drawing breaks, double-tap to reset the zoom, then sign without zooming.
- Save your signed PDF to Files first, then attach to email — emailing directly from the share sheet sometimes downsamples the file.
Sign your PDF on iPhone.
No install, no signup wall, no watermark on paid plans.
Frequently asked questions
Do I need to install an app to sign a PDF on iPhone?
No. Safari + MyPDFKitty handles it without any install. iOS Markup (built into Mail) also works for quick signs but offers less control.
Can I sign with Apple Pencil on iPad?
Yes — Apple Pencil works in our signer on iPad and produces the cleanest signature look possible.
What if the PDF is in my email?
Tap the PDF attachment to open in Safari (long-press → 'Share' → 'Open in Safari') or save to Files first, then upload here.
Will my signature be the same size on every page?
Yes — once you've drawn or typed it, you can place the same signature on multiple pages at the same size.
Is the signed PDF legally binding?
Yes — same legal weight as a desktop e-signature. ESIGN Act doesn't care which device you used.
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