How to Sign a PDF Online
September 23, 20265 min readHow to add your own signature to a PDF by drawing or typing it, what a visual signature does and doesn't guarantee, and when you need more than that.
Printing a document just to sign it and scan it back in is one of those small frictions that adds up. Signing a PDF digitally — placing a signature image directly onto the page — solves that for the vast majority of everyday cases: leases, forms, waivers, internal approvals, and anything else where a visual signature is enough.
What “signing a PDF” usually means
There are two very different things people mean by “sign a PDF”:
- A visual signature. An image of your signature (drawn or typed) placed onto the page, the same way it would look if you signed a printed copy by hand and scanned it. This is what most day-to-day signing needs.
- A cryptographic digital signature. A certificate-based signature that verifies identity and detects tampering, used for legally sensitive documents in regulated contexts. This requires a trusted certificate authority and identity verification — well beyond what a browser tool can provide.
The Sign PDF tool handles the first kind — a real, visible signature placed exactly where you want it — for signing your own documents.
Drawing vs. typing your signature
You have two ways to create a signature:
- Draw it with your mouse or finger (great on a touchscreen) for a signature that looks like your actual handwriting.
- Type your name and have it rendered in a cursive font — faster, and still produces a distinct, signature-like mark.
Either way, you end up with a transparent-background image you can place on the page.
Placing your signature
- Upload the PDF you need to sign.
- Draw or type your signature.
- Click the page where you want it, then drag to reposition or drag the corner handle to resize.
- Add it to the PDF and download.
What this tool doesn’t do
This is strictly for signing a document yourself. It doesn’t send a signature request to someone else, track who has and hasn’t signed, or manage a multi-party signing workflow — all of that requires a backend to send emails and store signing state, which is out of scope for a tool that keeps everything on your device. It also doesn’t add a cryptographic certificate signature — if a document needs verifiable, tamper-evident e-signing for legal purposes, check what your specific use case actually requires before relying on a visual signature alone.
A note on privacy
Your PDF, your signature, and the signed result never leave your browser — nothing is uploaded to a server at any point.