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How to Sign a PDF on iPhone (or Android) for Free in 60 Seconds

Jamie Signature
Jamie Signature ·

Need to sign a PDF from your phone, fast? Skip app downloads and paywalls. With Inkless, you can upload a file, add signature fields, and send it for a legally binding e‑signature—completely free and mobile friendly.

🚀 Quick Steps: Sign a PDF on Your Phone

  1. Open useinkless.com in Safari or Chrome
  2. Tap Upload and choose your PDF from Files, email, or cloud storage
  3. Drag and drop signature, date, and text fields
  4. Add recipients (or just yourself) and tap Send
  5. Sign instantly—no account or app required for anyone involved

That’s it. You’ll get a finalized, tamper‑evident PDF automatically.

📱 Why Mobile Signers Love Inkless

  • 100% free, unlimited documents and recipients
  • No apps to install: Works in the browser on iPhone, iPad, and Android
  • Legally binding: ESIGN and UETA compliant for contracts, NDAs, and approvals
  • Fast sharing: Pull PDFs directly from Mail, Files, Google Drive, Dropbox, or photos
  • Real-time alerts: Get notified when a recipient views or signs
  • Secure by default: AES‑256 encryption and audit trails on every document

✅ Best Use Cases from Your Phone

  • Signing offer letters, invoices, and contractor agreements on the go
  • Approving school forms, permission slips, or lease addenda
  • Completing healthcare consent or insurance forms during visits
  • Finalizing sales proposals without waiting to get back to a laptop

❓ Frequently Asked Questions

Do I need a DocuSign or Adobe Sign account?
No. Inkless is a free, browser-based alternative—no downloads or subscriptions needed.

Can multiple people sign from their phones?
Yes. Add unlimited recipients and everyone can sign from their own device.

Are signatures collected on mobile legally binding?
Absolutely. Inkless signatures are compliant with ESIGN and UETA.

Will recipients see ads or watermarks?
Never. Inkless keeps documents clean and professional.

🏁 Start Signing PDFs on Your Phone—Free

Whether you’re traveling, between meetings, or away from your laptop, Inkless makes mobile signing effortless and free.

👉 Start signing in 60 seconds: https://useinkless.com