How to sign a Google Doc on iPhone

Someone shared a Google Doc with you — a contract, a consent form, a freelance agreement — and there’s a signature line near the bottom. You open it on your iPhone, look for a sign button, and there isn’t one.

That’s not you missing it. The Google Docs app for iOS has no signature tool. The drawing canvas that lets you scribble a signature (Insert → Drawing → Scribble) only exists in Google Docs on a computer, in a browser. On the phone, the Insert menu gives you images, tables and links — no drawing, no signature field.

So here are the routes that actually work from an iPhone, honestly ranked.

The short answer

Export the Doc to PDF, then sign the PDF. It’s two taps to export, and once it’s a PDF you have every signing tool on iOS available to you — including the free one already on your phone. It’s also the correct answer for anything you’re sending back to someone, because a PDF is fixed: your signature can’t reflow or drift the way it can in a live, editable document.

Step 1: turn the Doc into a PDF (free, 15 seconds)

In the Google Docs app on your iPhone:

Open the document.
Tap the ⋯ (More) button, top right.
Tap Share & export → Send a copy.
Choose PDF, then OK.
In the share sheet, tap Save to Files (or send it straight into the app you’ll sign with).

If you’d rather not use the app at all: open the Doc in Safari, tap Share → Print, then pinch outwards on the print preview — that turns it into a PDF you can share or save. Same result.

Step 2: sign the PDF — two real options

Option A: iOS Markup (free, already on your phone)

Open the PDF from Files (or tap it in Mail).
Tap the pencil (Markup) icon.
Tap + → Signature → draw one with your finger, or pick a saved one.
Drag it onto the signature line, resize with the corner handles, tap Done.
Share it back — reply to the email, or upload it wherever it’s due.

If this covers you, stop here — you don’t need an app. For a one-off signature on a simple document, Markup is genuinely fine and it’s free.

Where it starts to grate, honestly: the signature is a raw finger-drawing on glass, and most people redraw it four or five times before it looks like their actual signature. The date is a text box you place and resize by hand. Initials on every page means repeating the whole dance per page. And Markup keeps exactly one signature — there’s no library, no separate initials, no auto-date.

Option B: a signature app (if this happens more than occasionally)

From Files or Mail, tap the PDF → Share → Signed.
Your saved signature, initials and today’s date are one tap each — drop them where they belong.
Tap Finish for a clean, flattened PDF, and share it straight back.

The difference is the setup, not the signing. You create your signature once — draw it properly, type your name in a real handwriting style, or let AI generate one from your name — and from then on every document gets the identical, tidy version in about ten seconds. If you sign a lease, an invoice and a school form in the same month, that setup pays for itself immediately.

On privacy: the big enterprise e-sign platforms upload your document to their servers, because they’re built for sending contracts out to other people for signature. You’re doing the opposite — receiving one and returning it — and that needs no cloud at all. Signed is local-first: the file never leaves your iPhone.

The other route: insert a signature image into the Doc itself

Sometimes you can’t export — the sender wants the signature in the Google Doc, in place, so they can keep editing around it. That works, with one requirement: the image must have a transparent background, or you’ll paste a white rectangle over the page.

Make a transparent PNG with the free signature generator — draw or type it, download it, nothing gets uploaded. (Why transparency matters, with examples.)
Save the PNG to your Photos.
In the Google Docs app, tap where the signature goes → + → Image → From photos.
Tap the image → Image options → set wrapping to In line or Wrap text, then drag it onto the signature line.

Be aware of the tradeoff: anyone with edit access can move, resize or delete that image, and it can shift if the text above it changes. It’s fine for an internal form or something informal. For anything going back to a landlord, an employer or a client, export to PDF instead — a flattened PDF is what “signed and returned” is supposed to look like.

What about Google’s own eSignature feature?

Google Docs does have a built-in eSignature tool, but two caveats keep it from being the answer here: it’s part of paid Google Workspace plans (not personal Gmail accounts), and it lives in Docs on the web, not in the iOS app. If your work account has it, it’s a good option at your desk. On a phone, you’re back to exporting a PDF.

Which one should you pick?

One document, one signature, never again → export to PDF, sign in Markup. Free, done in two minutes.
The sender needs it signed inside the Doc → transparent PNG, inserted as an image, and accept that it’s editable.
You sign things monthly or more → set up a reusable signature once; every future document becomes a ten-second job instead of a five-minute one.

One honest caveat regardless of route: for a high-stakes agreement, a signature image on a page may not be the whole requirement — check what’s actually expected for that specific document type. Signed is a signing tool, not legal advice.