Insert Page Numbers in PDF
Insert sequential page numbers into your PDF in seconds. Select a placement, set the start number, adjust the font size and colour to match your document style, then download. All processing runs in your browser.
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How it works
Each number is added with pdf-lib as a small piece of Helvetica text drawn on top of the existing page content, so scanned pages and text pages are numbered the same way. The page content, page size, and crop box stay as they are. Black numbers are drawn in full black and Gray numbers at 50% gray.
Processing runs in your browser
All processing happens inside your browser. pdf-lib modifies the document structure entirely in memory. Our servers are not involved at any point.
Related operations
For adding a diagonal text watermark to every page, try PDF watermark. To join several numbered files into one, use merge PDF. For turning sideways pages upright before numbering, see rotate PDF.
Frequently asked questions
- What PDF positions are available for page numbers?
- You can place page numbers at the bottom centre, bottom right, or top right of each page.
- Can I add page numbers to a scanned PDF?
- Yes. The page number is drawn as a text overlay on top of whatever content is on the page, whether it is scanned content or native PDF text.
- Does inserting page numbers change the page size?
- The page dimensions remain unchanged. The number is drawn inside the existing page boundary with a margin from the edge.
- Is there a page limit?
- There is no hard limit. Large PDFs may take a few seconds to process. All processing runs locally in your browser.
- What happens to the PDF's title and author?
- They stay as they are. The numbered copy keeps the source's document properties, such as title and author, and adds only the numbers to each page.
Last reviewed September 30, 2026
Other pages for this tool
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- Background reading: Complete guide to PDF tools
- Step by step: Remove, reorder, and watermark PDF pages