How to Add a Signature to a PDF
You don't need to print, sign, and rescan. Here's how to drop a signature into a PDF on every major device in under a minute.
Printing a document just to sign it and scan it back is a small ritual that wastes a surprising amount of time. Every modern device can drop a signature straight into a PDF — no printer, no scanner, no rescanning a slightly crooked page. Here’s how to do it on each platform, plus how our fillable templates make it even faster.
Quick note: whether an electronically added signature is binding is a separate question from whether it’s technically possible. The short version is that it usually is binding — see are electronic signatures legally binding for the details. This article is about the how-to, and it’s general information, not legal advice.
The three ways to create a signature
No matter which app you use, you’re really choosing one of three methods to produce the signature itself:
- Draw it — use a trackpad, mouse, touchscreen, or stylus to sign by hand. This looks the most like your real signature.
- Type it — enter your name and let the app render it in a handwriting-style font. Fast, legible, and fine for most business forms.
- Upload it — take a photo of your signature on white paper, or scan it once, and reuse that image forever.
Once you’ve created a signature, every tool below lets you save it and reuse it on future documents.
On a Mac: Preview (free, built in)
Preview is the fastest option on macOS and requires no downloads.
- Open the PDF in Preview.
- Click the Markup toolbar icon (the pen tip in a circle).
- Click the Signature icon, then Create Signature.
- Choose your method:
- Trackpad — sign with your finger, then press any key.
- Camera — hold a signed piece of paper up to the webcam.
- iPhone/iPad — sign on your connected device’s screen.
- Click your saved signature to drop it onto the page, then drag and resize it onto the signature line.
- Choose File → Save (or Export) to keep the signed PDF.
Preview also lets you type text into any blank field, so you can fill out a liability waiver and sign it in one pass.
On Windows: Adobe Acrobat Reader — Fill & Sign
Adobe Acrobat Reader is free and handles both filling and signing.
- Open the PDF in Acrobat Reader.
- Click Fill & Sign in the right-hand tools panel (or under the Tools menu).
- Click the Sign icon, then Add Signature.
- Pick a method:
- Type your name and choose a signature style.
- Draw with your mouse or touchscreen.
- Image to upload a photo of your handwritten signature.
- Click Apply, then click the signature line to place it. Resize as needed.
- Save the file (File → Save).
Fill & Sign is handy for forms with lots of fields, like a lease agreement or a medical consent form, because you can type into every field and sign without switching tools.
On iPhone and iPad
You have a couple of no-cost options:
- Markup (Files or Mail): Open the PDF in the Files app, tap the Markup pen icon, tap the + button, and choose Signature. Draw with your finger or Apple Pencil, then place and size it.
- Photos/Preview flow: If you received the PDF as an attachment, tap it, then use the Markup tools to sign before saving back.
Save the signed file to Files or send it straight back by email.
On Android
- Open the PDF in a viewer that supports annotation (Adobe Acrobat Reader for Android, or many built-in file managers).
- Tap Fill & Sign or the signature/annotation tool.
- Draw or insert a saved signature image, position it, and save.
If your default viewer can’t sign, the free Adobe Acrobat Reader app covers every Android device.
Method comparison at a glance
| Method | Best for | Looks like real ink? | Reuse later? |
|---|---|---|---|
| Draw | Personal, higher-stakes documents | Yes | Yes, once saved |
| Type | Quick business forms | No (styled font) | Yes |
| Upload image | Consistent, exact signature | Yes | Yes |
There’s no single “correct” method — pick the one that matches the formality of the document. A quick internal photo release is fine typed; a contract you’d want a drawn or uploaded signature on.
How our fillable PDFs work
Every template on this site ships as a fillable PDF and an editable Word (.docx) file, with dedicated fields already built in. That changes the experience in two ways:
- Interactive fields: Instead of hunting for the right spot to type, you tab through labeled boxes — name, date, address, and so on. The signature and date lines are placed exactly where they belong.
- Two formats, one document: Edit the Word version if you need to change wording or branding, then export a fresh PDF. Or use the PDF as-is and just sign it with the methods above.
To sign one of our templates:
- Download the PDF (or the Word file if you want to edit it first).
- Open it in Preview, Acrobat Reader, or your mobile Markup tool.
- Fill the interactive fields, then add your signature to the signature line.
- Save — and, if someone else needs to sign too, forward the file or route it through an e-signature service.
If more than one person signs, our guide on how to request a signature online walks through sequencing signers and keeping an audit trail.
Ready-to-sign starting points include our consent and signature forms, waiver and release forms, and authorization forms such as a credit card authorization.
The bottom line
Adding a signature to a PDF takes under a minute on any device: draw, type, or upload a signature, drop it on the line, and save. Preview, Adobe Reader Fill & Sign, and mobile Markup tools all do it for free. Start from a fillable template with the fields already in place and you skip the print-sign-scan loop entirely.
