How to Add Page Numbers to a PDF Online Free

LazyPDF's page numbers tool lets you place numbers in the header or footer, left or right or center of the page. You can set the starting number (useful when you want to number a document starting at a page other than 1) and adjust font size. All processing happens in your browser — no upload, no account, no charge.

1. 1Go to lazy-pdf.com/page-numbers in your browser
2. 2Upload your PDF by clicking or dragging the file onto the tool
3. 3Choose position (top or bottom of page), alignment (left, center, or right), and starting page number
4. 4Set font size to match your document's text size, then click 'Add Page Numbers' and download the numbered PDF

The conventional position for page numbers depends on the document type and whether it will be printed. For digital PDFs read on screen, bottom-center is the most common and readable placement — it mirrors what readers expect from formatted documents and sits outside the main content area. For printed documents that will be bound or stapled on the left edge, bottom-right or top-right keeps page numbers visible when the page is held open. For reports and formal documents, headers (top of page) are common for page numbers paired with running titles — for example, a company name on the left and the page number on the right of the header. For academic papers in standard formats (APA, MLA, Chicago), position requirements are specified by the style guide: MLA places numbers top-right, APA uses a running head top-left with number top-right. Match your document's intended format.

1. 1Digital documents shared as PDFs: use bottom-center for standard, professional appearance
2. 2Documents to be printed and bound: use bottom-right or top-right so numbers stay visible
3. 3Academic papers: check the required style guide (APA, MLA, Chicago) for exact position
4. 4Multi-section documents with covers: set starting number to skip unnumbered cover pages

Not every document should begin numbering at 1 on the first page of the file. A report with a cover page and table of contents typically numbers from page 1 at the first actual content page, not the cover. If your PDF file starts with a cover page that you do not want numbered, you can either add numbers starting at 0 (so the cover is '0' and the first content page is '1') or, more cleanly, split the PDF using LazyPDF's split tool, number only the content pages starting at 1, and merge them back. Alternatively, if you are adding page numbers to a chapter or section that continues from a longer document, set the starting number to the correct offset. For example, if chapter 3 starts at page 47 of a book, upload the chapter PDF and set the starting number to 47. This allows individual sections of a document to be circulated with correct page references matching the complete work.

1. 1Cover page should not be numbered: set start to 0 (cover shows 0) or split off the cover first
2. 2Roman numeral front matter followed by Arabic numbered body: process front matter and body separately
3. 3Continuing section of a larger document: set start number to match the section's position in the full work
4. 4Replacing existing page numbers: no direct replace option — re-process from a version without page numbers

Page numbers should be clearly legible without distracting from the document's content. For body text at 11–12pt, page numbers at 10–11pt are standard. For larger-format documents (presentations, posters, large-format reports), scale proportionally — a document with 18pt body text might use 14–16pt page numbers. Position page numbers in a margin area that does not overlap with the document's content. If the document has tight margins with content running close to the page edge, small font sizes (8–9pt) reduce the risk of overlap. LazyPDF places numbers in the footer or header area by default, which works for documents with standard margins. For documents with unusually large headers or footers, visually check the first page of the downloaded result to confirm placement is correct before distributing.