How to Sign a PDF Document Online for Free (2025 Guide)

We've all been there. You receive an email with a PDF attachment—a lease, a contract, or a permission slip—and you need to sign it. You don't have a printer, and you certainly don't want to pay $20 for a monthly subscription just to sign one document.

Searching for "free pdf signer" often leads to frustration:

Fake Free Tools: They let you upload and sign, but ask for a credit card to download the final document.
Software Downloads: Clunky desktop apps that take forever to install.
Privacy Risks: Sketchy sites that sell your data.

In 2025, signing a PDF should be instant and free. Here is the easiest way to do it.

The Easiest Way to Sign a PDF Online

Inkless is a completely free, web-based e-signature tool. It works on your phone, tablet, or computer.

Step 1: Upload Your Document

Go to useinkless.com and click "Get Started". You can drag and drop your PDF directly into the browser.

Step 2: Add Your Signature

Once your document is uploaded, use the toolbar to add fields.

Signature: Draw your signature with your mouse or trackpad, or type it out.
Date: One click to add today's date.
Text: Fill in any other required information like your name or address.

Step 3: Send or Download

If you just need to sign it yourself, you can download the signed PDF immediately. If you need to send it to someone else to sign, just enter their email address. They'll get a secure link to sign the document.

Time taken: Less than 60 seconds. Cost: $0.

Why Not Use Adobe Acrobat or Preview?

While you can use desktop tools like Adobe Acrobat Reader or Apple's Preview, they have limitations:

Collaboration: They are great for signing yourself, but terrible if you need others to sign. You have to email the file back and forth, creating version control nightmares.
Mobile Experience: Trying to sign a PDF on a mobile screen with desktop software is often clunky.
Audit Trails: Desktop tools rarely provide a legal audit trail showing who signed and when.

Inkless provides a legally binding audit trail for every document, ensuring your signature holds up in court.

Frequently Asked Questions

Is it safe to sign PDFs online? Yes, if you use a secure provider. Inkless uses AES-256 encryption to protect your documents in transit and at rest.

Can I sign on my iPhone or Android? Absolutely. Inkless is fully responsive and works perfectly in your mobile browser. No app download needed.

Is it really free? Yes. Inkless allows you to sign and send unlimited documents for free.

Ready to Sign?

Don't waste time printing, scanning, or fighting with clunky software.

👉 Sign your PDF now: https://useinkless.com