Sign PDFs on Your iPhone Without the App Store

Your iPhone actually has a built-in way to sign PDFs. It’s Apple’s Markup tool, tucked away inside the Files app and Mail. It works, sort of, but it’s limited in ways you notice as soon as the document is anything more than a single page. You can only draw, not type. Multi-page documents get awkward. And if you already keep a clean scan of your handwritten signature somewhere, Markup has no way to use it. Signegy runs in Safari and covers all three signing methods, with nothing to install.

The Built-in Option (And Why It Falls Short)

Credit where it’s due: Markup ships with iOS, so you don’t have to install anything to use it. You can get to it by opening a PDF in Files and tapping the pen icon in the top-right, or by tapping a PDF attachment in Mail and choosing Markup from the share sheet.

What Markup lets you do is draw a signature with your finger. For a single-page form where you just need a squiggle on the signature line, honestly, it’s fine. The trouble starts when you need anything else.

You can’t type a signature. Every signature has to be drawn freehand, which is doable on a big screen with a steady hand, but it’s inconsistent if you’re signing several documents and want them to look alike. You also can’t upload a signature image. If you already have a clean scan of your handwritten signature sitting in your photo library, Markup will ignore it completely.

Multi-page PDFs are where things really get frustrating. Navigating between pages while the annotation layer is active feels clunky, and dropping a signature onto exactly the right page takes more patience than most people have when they’re trying to reply quickly. The resize handles are minimal too, so nudging a drawing to fit a specific signature line is fiddlier than it ought to be. Markup is a general-purpose annotation tool that happens to support drawing. It isn’t a PDF signer.

How to Sign a PDF on iPhone with Signegy

Signegy runs in Safari with nothing to install. Here’s the whole flow.

1. Open Safari and go to signegy.com. The tool loads right away. No account creation, no email prompt, no onboarding carousel to swipe through.

2. Tap to upload your PDF. You can browse from Files, iCloud Drive, or anywhere your iPhone can reach. If the PDF came in as an email attachment, save it to Files first (tap the attachment, then Save to Files), and upload from there. Once it loads, the document stays on your phone. All the processing happens in Safari using client-side JavaScript, so nothing gets sent to a server.

3. Pick how you want to sign. You get three options. You can draw with your finger on the touchscreen. You can type your name and pick a handwriting-style font for something clean and consistent. Or you can upload a signature image from your camera roll, which is handy if you’ve already got a scan of your handwritten signature saved.

4. Drag it into place. Move the signature to the right spot, resize it to match the signature line, and if the PDF has more pages, flip to them and sign wherever else is needed.

5. Tap download. The signed PDF saves through the standard iOS save dialog, so it ends up in Files wherever you choose. It’s a normal PDF file with your signature embedded, and it’ll open correctly on any device or for anyone you send it to.

Quick tip: turn your iPhone sideways before drawing. The extra horizontal space makes a real difference on the smaller models, and your signature comes out looking less cramped.

Signegy vs. iPhone Alternatives

Apple Markup is free and already on the device, which counts for something. It only does drawn signatures, though, and the positioning controls are minimal. For a one-page signature line where precision doesn’t really matter, it’s adequate. For anything else, it becomes a source of friction.

Adobe Acrobat Reader is the heavyweight option. It’s full-featured and lives on the App Store, but you have to create an Adobe account before you can do much with it, and the app will keep nudging you toward a paid Acrobat subscription. It’s capable if you’re willing to tolerate the overhead.

DocuSign is built for a different workflow entirely. It handles signature requests that someone else initiated, not self-signing a PDF you already have. If you got a DocuSign envelope in your inbox, you need DocuSign. If you’re signing a PDF you already have on your phone, DocuSign isn’t what you want.

Signegy in Safari covers draw, type, and image upload, with nothing installed, no account, and no limits on how many documents you sign. Your PDF stays on your iPhone the entire time. If you’re on Android instead, the Android signing walkthrough covers the same flow in Chrome.

Tips for the Best iPhone Signing Experience

Use your index finger instead of your thumb when drawing. It’s a small thing, but index-finger control is noticeably finer, and the signature ends up looking more like your actual handwriting. On newer models with larger displays (the Plus and Pro Max especially), there’s plenty of room for a natural signing motion.

If you want the cleanest result, try Type mode. Choose a handwriting font, enter your name, and it’ll look polished every time. Useful when you’re running through several documents in a row and want them to match.

If you sign PDFs on your iPhone often enough that visiting signegy.com feels like a step too many, pin it to your home screen. In Safari, tap Share (the square with the up arrow), scroll down, and tap Add to Home Screen. You’ll get a Signegy icon that opens the tool directly, skipping the browser navigation entirely.

For more on drawing signatures on any device, or the same write-up on Android instead, those pages cover the specifics. And if you’re curious about how browser-based signing actually keeps documents private, the privacy-focused signing overview goes into the architecture.