How to Make a Digital Signature on Your Phone (No Printing)

Quick answer: To make a signature on your phone, open ScanMint AI, tap Signature and draw your name with your finger. Pick a pen color and thickness, tap Save, then share it as a PNG image to add to any document. No printer, no scanner. ScanMint AI is free on iPhone and Android.

Stop printing just to sign

A form arrives by email. It needs your signature by the end of the day.

So you print it, sign it, scan it, and send it back. Three devices for one squiggle.

Now picture this instead: draw your signature once on your phone, save it, and drop the image into whatever you need to sign. ✅

That's what Signature in ScanMint AI is for.

How to make a digital signature on your phone: step by step

1. Open ScanMint AI and tap "Signature"

You'll find Signature under Quick Tools on the home screen. Don't have the app yet? Get it free on the App Store or Google Play.

2. Draw your signature with your finger

Sign in the box, just like on paper. Use Undo and Redo to fix a stroke, or Clear to start again.

3. Pick a pen color and thickness

Choose a Pen Color (black and blue are the usual choices for documents) and a Pen Thickness: Thin, Medium or Thick.

4. Tap Save

You'll see "Signature saved to history!" Your signature is stored on your phone, ready to reuse.

5. Share it as an image

Tap Share to send your signature as a PNG image to WhatsApp, Mail, AirDrop, Gmail or any app, or tap Download to save it.

6. Add it to your document

Open the document in the app you normally use to edit or mark it up (for example your phone's PDF markup tool, Word or Google Docs), insert your signature image, and place it on the signature line.

7. Find it anytime in your History

Every signature you save appears in your History. Tap it to View, Share or Copy it, so you only ever draw it once.

💡 Prefer typing? The Type Signature tool turns your typed name into a clean, stylized signature. It's handy when drawing with a finger feels awkward.

Tips for a neater signature

• Sign across the middle of the box so no part of it gets cut off.

• Use Medium thickness for documents: it stays readable when shrunk onto a signature line.

• Choose black or blue ink, the colors most forms expect.

• Sign slowly. A smooth, steady stroke looks more like your pen signature.

When people use a signature on their phone

• Work: offer letters, timesheets and approval forms

• Home: rental forms, school permission slips and delivery notes

• Freelancers: quotes, invoices and simple agreements

• Students: applications and course forms

Frequently asked questions

How do I create my signature on my phone?

Open ScanMint AI, tap Signature, draw your name with your finger, pick a color and thickness, and tap Save.

Is ScanMint AI free?

Yes. ScanMint AI is free to download on the App Store for iPhone and on Google Play for Android.

What format is my signature saved in?

It's shared as a PNG image, which works in almost any document, email or chat app.

Can I reuse my signature?

Yes. Every saved signature stays in your History, so you can share or copy it again anytime.

Is my signature stored privately?

Yes. Your signature is saved on your phone, not uploaded to a server.

Is a drawn signature legally valid?

In many countries, an electronic signature such as a drawn or typed one is accepted for everyday documents. Some documents (for example wills or certain property and court papers) may need a wet-ink or certified e-signature. If you're unsure, check with the person asking you to sign. This isn't legal advice.

Sign your next document without a printer

Form, letter or agreement: your signature is a few taps away. More guides on the ScanMint AI blog, including how to scan a document to PDF and turn photos into one PDF.

📲 Download ScanMint AI free

• Download on the App Store

• Get it on Google Play

Visit scanmintai.com to see all 18 tools in ScanMint AI.