Sign PDF Online Free

Why sign a PDF online?

Printing, signing by hand, and scanning documents again can slow down simple tasks. Adding an electronic signature to a PDF lets you complete agreements, forms, and approvals much faster while keeping the document ready to share.

PDFly lets you sign PDF files directly in your browser. Your documents never leave your device — no account, no watermark, no software installation.

Common uses

Sign contracts online
Approve business documents
Complete application forms
Add handwritten signatures
Finalize agreements

Best Practices & Limitations

Tips for best results

Use a consistent signature style across documents so it's recognizable as genuinely yours.
Position the signature clearly within the designated signature block to avoid ambiguity.
Keep a signed copy for your own records immediately after signing, before sending it onward.

Limitations & when not to use this tool

This adds a visual signature image/drawing to the page — it isn't a certificate-based digital signature with cryptographic verification.
For contracts requiring legally binding e-signatures with an audit trail, a dedicated e-signature service may be required by your jurisdiction or counterparty.
Doesn't verify the signer's identity — it simply places the signature you provide onto the document.

About sign PDF

Add a signature to a PDF for documents that need a signed copy. PDFly supports a simple browser-based signing workflow for common documents.

Common uses for sign PDF

Useful for forms, approvals, agreements, applications, internal paperwork, and documents that need a visible signature.

Tips for using this PDF tool

Confirm whether the recipient requires a specific type of electronic or digital signature before relying on a signed PDF for a formal process.

Related PDF tools

Want a step-by-step walkthrough? Read the Sign PDF guide.

Frequently asked questions

Can I draw my own signature?

Yes. You can draw or insert your signature and place it anywhere on the PDF.

Is my signature legally valid?

Legal validity depends on your local laws and the document requirements. PDFly provides an electronic signing tool but doesn't certify legal compliance.

Can I edit the signature later?

Before saving, you can reposition or replace your signature. After downloading, you'll need to edit the PDF again to make changes.

Does signing reduce PDF quality?

No. Adding a signature doesn't affect the quality of existing pages or images.

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Common workflow

Protect PDFSign PDF

Sign PDF

Create Your Signature

Place on Page