How do I sign PDF files with PDFly?

Simply drag and drop your PDF into the signing tool, click where you want to add your signature, create or upload your signature, and save the signed document.

Are digital signatures legally valid?

Yes! PDFly's digital signatures comply with international standards including eIDAS, ESIGN Act, and UETA, making them legally binding in most countries.

What types of signatures can I add?

You can add drawn signatures, typed signatures, uploaded signature images, and advanced digital certificates with cryptographic security.

Can I add multiple signatures to one document?

Absolutely! You can add unlimited signatures, initials, text, and annotations to any PDF document. Perfect for multi-party agreements.

How secure are my signed documents?

Completely secure. Documents are processed locally on your device with advanced encryption. Your signatures and documents never leave your device.

FREE: Unlimited PDF signing

Sign PDF Files in Seconds

Add digital signatures, text, and annotations to PDF documents instantly. Free, secure, and legally binding signatures that work offline.

Drag & drop your PDFs to sign

Start signing PDFs now

Legally binding

Signatures comply with international standards

Secure encryption

Advanced cryptographic protection

Lightning fast

Sign documents in seconds

Works offline

Sign documents without internet connection

Beyond Sign PDF: More Tools for Every Document

Everything you need to sign, annotate, and authenticate your PDF documents professionally.

Edit PDF

Edit text, images and annotations

Merge PDF

Combine multiple PDFs into one

Compress PDF

Reduce file size without quality loss

Convert PDF

Convert PDF to Word, Excel, images etc.

Protect PDF

Add passwords and security

Sign PDF

Digitally sign PDF documents

Translate PDF

Translate documents into different languages

Summarize PDF

Generate AI-powered document summaries

Why Choose PDFly for PDF Signing?

The most trusted PDF signing solution with advanced security and legal compliance.

Students

Sign academic forms, applications, and research agreements. Perfect for scholarship applications, internship contracts, and university documentation.

Business & Legal

Sign contracts, agreements, and official documents with legally binding digital signatures. Streamline approval workflows and document authentication.

Document Management

Enable team members to sign documents remotely. Reduce paperwork, speed up approvals, and maintain secure document trails.

PDF Signing FAQ

Common questions about signing PDF files with PDFly.

Start Signing PDFs Today

Free, unlimited PDF signing with legally binding digital signatures.