How to add page numbers to a PDF on iPhone (no app to install)

One reason people install third-party apps on their phone is that they don't realise the same tool runs perfectly in mobile browsers. Add Page Numbers to PDF is browser-only — no app store, no install — and it works exactly the same on iPhone as it does on a laptop.

Use the tool: Add Page Numbers to PDF — Runs entirely on your device using open web standards.

Step-by-step on iPhone

Open Safari and go to Add Page Numbers to PDF.
Tap "Choose file" (or drag from the Files app if you're in split-screen on iPad).
Pick the PDF from Photos, iCloud Drive, or Files — they all work.
Set your options (sizes, quality, output format). Tap "Run" or whatever the equivalent button is for Add Page Numbers to PDF.
Save the result. Safari downloads to the iCloud Drive Downloads folder by default; tap the result and choose "Save to Files" if you need it somewhere specific.
AirDrop or share it straight from the Files share menu — useful if the PDF is going to a Mac next.

Useful iOS-specific tricks

Add Add Page Numbers to PDF to your home screen to make it feel like a native app: tap the share button in Safari, scroll to "Add to Home Screen." It launches in its own window, no browser chrome.
Use the Files app for batch input — select multiple PDFs in Files, tap Share → Open in Safari, and Add Page Numbers to PDF picks them all up at once.
Photos library access works the same as any iOS app, but with no permissions to grant separately.

Open the tool

Add Page Numbers to PDF →

Everything happens locally in your browser — your file never leaves your device.

Why a browser tool beats most native apps for this

Native apps that add page numbers to PDFs are almost all just wrappers around browser-class libraries. They usually upload your file to their server, which is slower, less private, and sometimes paywalled. Add Page Numbers to PDF does the work directly in your phone's browser engine — same code path that would run if you were on a desktop, no upload, no signup, no daily limit.

Frequently asked questions

Is my PDF private when I use a browser tool?

Yes — more private than most apps, because nothing is uploaded. The PDF is processed entirely inside the browser tab and is gone the moment you close it.

Does it work on older iPhones?

Anything from the last five years handles Add Page Numbers to PDF comfortably. Older devices may take longer for big files, but the underlying APIs (WebAssembly, FileReader) have been stable for years.

Will processing drain my battery?

Heavy PDF work uses your phone's CPU just like any other intensive app. For most PDFs the job finishes in seconds; a 100MB video might use a noticeable but small slice of battery.

Why isn't there a "Add Page Numbers to PDF" app on the App Store?

Because there doesn't need to be. Mobile browsers run the same WebAssembly the desktop site uses. Shipping a native app would mean maintaining two codebases for the same feature.

Related guides

Ready to try it?

Launch the tool: Add Page Numbers to PDF. Runs entirely on your device using open web standards.

Last reviewed May 2026. File-size limits, portal requirements, and software defaults change over time — always verify with the destination platform before uploading time-sensitive documents. References to third-party services and products are for descriptive purposes only and do not imply any partnership or endorsement.