# How to Sign a PDF on iPhone — Free, No App Needed

> Safari can sign your PDF without an app — draw, type, or upload a signature, drag it into place, and download. Our measured results inside.

Source: https://toolpantry.app/blog/how-to-sign-a-pdf-on-iphone

## About

Safari can sign the document in about a minute — draw, type, or upload your signature, drag it into place, done. No app, no account, and neither the PDF nor your signature ever leaves the phone.

## Quick answer

Short answer: open toolpantry.app/sign-pdf in Safari, choose your PDF, create a signature (draw it, type it, or upload a photo of it), drag it where it belongs, and download the signed file.

## The steps

1. In Safari, go to **toolpantry.app/sign-pdf**.
2. Tap **Choose one PDF** and pick the document from Files.
3. Create your signature: draw it with your finger, type your name, or upload a photo of your ink signature.
4. Drag the signature into position over the signature line, and resize it with the slider.
5. Signing a long agreement? Tick **Add to every page**.
6. Tap **Download signed PDF** and save it back to Files.

The three signature styles, for reference:

- **Draw** — finger or stylus right on the screen; the most natural look.
- **Type** — pick a script style and get a tidy, consistent signature.
- **Upload** — a photo of your ink signature on plain white paper; the background is removed automatically.

The original PDF is never modified. If the placement looks off, run it again — there's nothing to undo because nothing was changed.

## What this actually does

Your signature is stamped onto the page as an image. That keeps it simple and private, and it's what most everyday documents need — rental applications, school forms, permission slips, invoices you're approving.

Two honest limitations, because you'll want to know them before you sign a mortgage:

- **It's a visual signature, not a certified digital signature.** There's no certificate, no audit trail, no tamper-proofing. Banks and notaries sometimes require a certified e-signature service — for those, this tool is the wrong one. For the other 90% of PDFs, it's fine.
- **Pages with an unusual rotated layout get skipped.** The tool tells you when it skips one instead of stamping the signature in the wrong place.

## Our test, with real numbers

We signed a 196.8 KB scanned document with a typed signature. The signed file came out at 210.5 KB — the signature image added about **14 KB**, and the page count didn't change.

| What | Result |
|---|---|
| Original PDF | 196.8 KB |
| Signed PDF | **210.5 KB (+14 KB)** |
| Placement | 1 page, positioned by drag |
| Engine download | about 1.7 MB, once per visit |

Fourteen kilobytes. If you were expecting signing to bloat the file, it doesn't — a signature is tiny next to the document it sits on.

## Touches worth knowing

Drawing with your finger works better than you'd expect, but type it if you want it tidy. If you upload a photo, shoot it straight on, on plain white paper — the background remover is good but not magic. And if the portal then rejects the file for being too big, that's a different problem: run it through [Compress PDF](https://toolpantry.app/compress-pdf.html). Combining the signed page with attachments? That's [Merge PDF](https://toolpantry.app/merge-pdf.html).

## Notes

By the Tool Pantry team, October 2026. Tested with Chrome 130 on macOS using a 196.8 KB test PDF; Safari on iPhone uses the same browser APIs — if your iPhone behaves differently, tell us.

## FAQ

**Is it really free?**

Yes. No account, no watermark, no page limits. The whole thing runs in your browser.

**Can I draw the signature with my finger?**

Yes — that's the default tab. A stylus or finger both work. You can also type it or upload a photo; all three produce a transparent PNG.

**Is a signed PDF from this tool legally valid?**

For most everyday agreements, a visible signature is what the other side is asking for. It is not a certified digital signature, though — contracts that explicitly require certification need a qualified e-signature service. Check what the document itself demands.

**Does it work the same on a computer?**

Yes, identical options. On desktop, drawing with a mouse works fine.