Is Signis! free to use?

Yes, Signis! is free to download and use from the Google Play Store.

Can I sign both PDFs and images?

Yes, Signis! supports signing both PDF documents and image files with your custom signatures.

Does Signis! work offline?

Yes, Signis! works completely offline. Your documents and signatures never leave your device.

Can I save multiple signatures?

Yes, you can create and save multiple signatures and reuse them across different documents.

How to Sign a PDF on Android (2025) - Free & Offline

Quick Answer: You can sign PDFs on Android for free using Signis! — no subscription required. The app works completely offline, so your documents never leave your device. Just open the app, select your PDF, add your signature, and export.

01 Why Sign PDFs on Mobile?

Gone are the days when you needed to print, sign, scan, and email documents back. With mobile PDF signing, you can:

✓Sign contracts from anywhere — no printer needed
✓Approve documents instantly while on the go
✓Keep everything private — no cloud uploads required
✓Save time — complete in under 60 seconds

02 Method 1: Using Signis! (Free, No Subscription)

Signis! is a free Android app that lets you sign PDFs without any subscription. Here's how to use it:

Step 1: Download Signis!

Get the app from Google Play Store. It's 100% free with no hidden fees.

Download on Play Store

Step 2: Open Your PDF

Launch Signis! and tap "Sign PDF." Browse your device to select the PDF you want to sign. You can also use the share menu from any app (Gmail, Files, Drive) to send a PDF directly to Signis!

Step 3: Create or Select Your Signature

You have three options:

Draw: Use your finger or stylus to draw your signature
Type: Type your name and choose a font style
Upload: Use a photo of your existing signature

Pro tip: Save your signature for reuse — you'll never have to recreate it.

Step 4: Place and Resize

Tap anywhere on the PDF to place your signature. Drag to reposition and pinch to resize. The signature stays exactly where you put it.

Step 5: Export & Share

Tap "Export" to save the signed PDF or share it directly via email, messaging apps, or cloud storage. The signed document is saved to your device instantly.

03 Why Choose Signis! Over Other Apps?

100% Free

No subscription required. No paywalls for basic signing.

Works Offline

No internet needed. Sign documents on planes, in remote areas, anywhere.

Private & Secure

Your documents never leave your device. Zero cloud uploads.

Save & Reuse

Create your signature once and reuse it across all documents.

04 Frequently Asked Questions

Is it legal to sign PDFs on my phone?

Yes! Electronic signatures are legally binding in most countries (including the US, UK, EU, and Canada) under laws like ESIGN and eIDAS. For most contracts, agreements, and forms, a mobile signature is just as valid as a handwritten one.

Can I sign PDFs without installing any app?

Some apps offer web-based signing, but they typically require uploading your document to their servers. For privacy and security, using a dedicated app like Signis! that works offline is recommended.

Do I need an internet connection?

No! Signis! works completely offline. You can sign documents on a plane, in areas with poor signal, or whenever you prefer not to use data.

Is my signature secure?

Absolutely. Signis! processes everything locally on your device. Your documents and signatures are never uploaded to any server — they stay 100% private.

Ready to Sign Your First PDF?

Download Signis! now and start signing documents in seconds — no subscription, no cloud uploads, no hassle.

Get Signis! Free on Play Store

How to Sign a PDF on Android Without a Subscription