How to Add a Signature to a PDF Online (Free, No App)

Printing a document just to sign it and scan it back is a workflow from another era. Today you can sign any PDF directly in your browser in under a minute, without installing anything or creating an account.

Here's how to do it.

How to Sign a PDF for Free

1. Open the PDF Signer on Converters.co
2. Upload your PDF
3. Add your signature — choose one of three methods:
   • Draw — Use your mouse, trackpad, or touchscreen to sign directly
   • Type — Enter your name and choose a signature style/font
   • Upload — Upload an image of your handwritten signature (PNG with transparent background works best)
4. Drag the signature to the correct position on the page
5. Resize and adjust as needed
6. Click Download Signed PDF

The entire process happens in your browser. Your document is never sent to any server.

Which Signature Method Should You Use?

Method	Best For	Looks
Draw	Personal documents, quick signing	Natural handwriting
Type	Professional documents, consistent branding	Clean, formal
Upload	Matching your existing pen signature	Identical to handwritten

For legal contracts and formal agreements, the drawn or uploaded signature usually looks most professional. For internal documents, typed signatures are perfectly acceptable.

Is an Electronic Signature Legally Valid?

In most countries, yes. Electronic signatures have been legally binding in the US under the ESIGN Act since 2000, and in the EU under eIDAS since 2016. Simple e-signatures (like a drawn or typed signature on a PDF) are valid for the vast majority of everyday documents including:

• Employment contracts
• NDA agreements
• Rental agreements
• Purchase orders
• Internal approvals

For high-stakes documents like real estate deeds or court filings, you may need a qualified electronic signature (QES) with identity verification, which requires dedicated e-signature services like DocuSign or Adobe Sign.

Tips for a Professional Result

• Use a PNG signature with a transparent background when uploading — it blends cleanly into any document
• Match the signature size to the signature line on the form
• Sign on a touchscreen for the most natural-looking drawn signature
• If the document has multiple signature fields, add each signature separately and position them individually

Related PDF Tools

After signing, you may also want to:

• Compress PDF — Reduce file size before emailing the signed document
• Watermark PDF — Add "CONFIDENTIAL" or your company name for added protection
• Merge PDFs — Combine the signed document with supporting attachments

Frequently Asked Questions

Is signing a PDF in the browser secure? Yes. Converters.co processes everything locally in your browser. No file data is transmitted to any server at any point.

Can I add multiple signatures to one PDF? Yes. Add and position as many signature fields as the document requires before downloading.

Will the signed PDF open correctly on all devices? Yes. The signature is embedded as a standard PDF annotation, so it renders correctly in any PDF viewer including Adobe Reader, Preview, and browser-based readers.

Do I need an account? No. The tool is completely free and requires no registration.

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Sign your PDF now — no signup, 100% private.