Add page numbers to a PDF on Android by opening Chrome, picking your file from the Android file picker, and tapping a single button — the entire job runs inside the browser tab, and never uploads the document anywhere. The page that comes back is a brand-new PDF with your chosen position, format, and starting number stamped cleanly onto every page, while the file you selected stays exactly as it was on your phone. Because the tool runs in JavaScript on your own device, it works on Android phones from Samsung, Pixel, OnePlus, Xiaomi, and any other handset that has a modern browser, and it does not require installing anything from the Play Store, granting storage permissions, or signing up for an account. The numbered copy is produced locally using JavaScript in your browser, with the same Helvetica typography, the same half-inch margin from the page edge, and the same precise right-alignment and centering regardless of how many digits the page number contains. To get started, open the Add Page Numbers to PDF tool at lizely.com in Chrome on your phone.
Phone-based PDF work has always been awkward. The default Android PDF viewer can open a file, scroll through it, and fill a simple form, but it cannot stamp running numbers on every page in one pass. Most full-featured mobile PDF editors either sit behind a subscription, demand access to your contacts and storage, or expect you to upload the file to a cloud service, which is not an option when the document is a contract, medical record, or financial statement. A browser-based tool closes that gap because the tool runs in your browser using JavaScript, so the same one-click workflow that works on a desktop also works on a phone.
What you need on your Android phone
You do not need anything beyond a working browser and a copy of the PDF you want to number. The tool is browser-based and reads your file once you select it. The PDF itself can live anywhere your file picker can reach: the Downloads folder, Google Drive, OneDrive, a USB transfer folder, a chat attachment, or even a freshly photographed scan that has been saved back as a PDF. The tool reads the file once you select it, so the document does not need to be pre-loaded or synced to the cloud. Because the entire job is local, it also works on a hotel Wi-Fi connection or in airplane mode after the page has loaded, which is useful when you are travelling and need to number a contract before signing.
It helps to know roughly how many pages your document has, because that decides whether the plain, "N of total", or "Page N" format is the right choice. For short documents of one to five pages, plain numbers are unobtrusive; for longer contracts, manuals, or manuscripts, "N of total" gives readers an instant sense of how much is left. You can preview any of the three choices because they all draw with the same Helvetica font at the size you set, and the same setting is applied uniformly to every page in the document, so a fifty-page file numbers just as quickly as a two-page one.
How to add page numbers to a PDF on Android
- Open Chrome on your Android device and navigate to the Add Page Numbers to PDF tool at lizely.com.
- Tap Browse PDF and choose the file you want to number from the Android file picker, or drag the file onto the page if your browser supports drag-and-drop.
- Pick a position from the six options: bottom center, bottom right, bottom left, top center, top right, or top left.
- Pick a format: plain (1, 2, 3), "N of total" (1 of 12), or "Page N" (Page 1, Page 2).
- Set the start number in the Start number field — leave it at 1 for a normal document or raise it when the PDF is a section of a larger work.
- Adjust the font size if the default feels too discreet or too prominent for the page layout.
- Tap Add page numbers and wait a moment for the new PDF to be built inside the browser.
- Tap the download link to save the numbered copy to your phone; your original file is left untouched in its original folder.
Picking the right position and format
The position and format you choose have more effect on how the finished document feels than you might expect, so it pays to pick deliberately. Bottom center is the default choice for printed contracts and academic papers because the numbers sit where readers' eyes naturally fall. Bottom right is common in business reports. Top corners are useful when the bottom of every page is already busy with footnotes, citations, or a colored footer band, and you want the number to stay clear of that content.
| Format | Example | Best for |
|---|---|---|
| Plain | 1, 2, 3 | Short documents, internal drafts, lecture handouts |
| N of total | 1 of 12 | Long contracts, manuals, reports where readers want to know progress |
| Page N | Page 1, Page 2 | Court filings, manuscripts, formal submissions |
The same combination is applied uniformly to every page in the document, so a fifty-page file numbers just as quickly as a two-page one. If you change your mind after running the tool once, you can re-run it with a different setting and download another numbered copy — your original PDF is never modified in place, and the tool always hands you back a brand-new file rather than overwriting the one you selected.
Starting from a number other than 1
The Start number input is more useful than it first looks. If your PDF is the third chapter of a thesis that begins on page 42 of the full document, set the start to 42 and the tool will print 42 on the first stamped page, 43 on the second, and so on. If you want to skip the cover page in spirit but still number from page 1 of the body content, set the start to 1 and the tool simply counts up from there — the cover page of your PDF is still page 1 unless you place it on a different sheet or use a dedicated tool to remove it.
This is also where the Start field saves you from having to renumber manually. Instead of opening a desktop PDF editor, setting up a master page template, defining a Bates-style counter, and stamping each section in turn, you run the tool once per section with the right starting value and stitch the resulting files together afterward with a PDF merge pass if needed. The combination takes care of long, multi-part filings without a single subscription or install, and the merge step also runs locally so the sections never leave the phone.
Privacy: why nothing leaves your phone
Every part of the numbering job runs inside the browser tab on your device. When you tap Browse PDF and pick a file, the PDF is read into memory as JavaScript data and processed locally; it is not sent to a server, not stored in the cloud, and not logged anywhere on lizely's side. Once the numbered PDF is ready, the tool hands it back to your phone as a download link, and the original file remains untouched in whichever folder you picked it from. This is why the tool is safe to use on contracts, medical records, financial statements, and any other document that should never leave your possession.
You can confirm the local-only behavior yourself by loading the tool in airplane mode after the page first loads. The numbering job still completes and the file is still produced, which is only possible if the work is happening on the device. For readers who want to dig deeper into the privacy model, the browser-based, no-upload page-number workflow guide walks through the same guarantees step by step and explains why no server round-trip is needed to stamp numbers on a PDF.
When the tool cannot read your PDF
Two situations cause the tool to stop before it has stamped a single page. The first is a password-protected PDF. Browsers cannot read encrypted PDF contents without the password, so the tool surfaces a clear message asking you to unlock the file first; once you do, you can run the page-numbering pass on the unlocked version. The second is a corrupted or partially downloaded PDF, where the internal structure that the JavaScript library reads is incomplete. Re-downloading the file from its original source usually fixes this, and the tool will then process it normally. Outside of those two cases, the tool numbers any PDF it can open.
If you find you need to remove a page before numbering — for example, to drop a blank back cover so it does not receive its own number — the Delete PDF Pages tool runs in the same browser and produces an editable copy in one click. Pairing it with the page-numbering pass keeps the whole workflow on the device and offline once the page is loaded, which is exactly the privacy posture that matters for sensitive paperwork handled on a phone.