Add Page Numbers to PDF

Number a PDF in three steps

1. Choose one PDF up to 20 MiB and wait for its structure and page count to be checked. This tool accepts a static subset, not every PDF feature.
2. Choose all pages or an inclusive range, enter the first number, and set the position, font size and margin. Page numbers in these controls count from the first physical document page.
3. Select Add page numbers. When the current result is ready, download numbered.pdf and check the number placement before using or printing it.

What the numbering controls mean

The first selected page receives your first number. Each following selected page receives the next integer; pages outside the range get no new number.

Top and bottom positions are relative to the page as displayed, including supported quarter-turn rotation. Left, center and right alignment use the visible crop area.

Font size and margin are in points. The margin insets the font's advance/ascent/descent rectangle; it is not a measurement from the exact visible edge of each glyph.

The added labels contain ordinary digits 0–9 in black Helvetica. The tool does not change the PDF viewer's page labels, update references or remove existing printed page numbers.

Examples before you create the file

In an eight-page document, choose pages 3 through 5 and start at 10. Document pages 3, 4 and 5 receive 10, 11 and 12; the other five pages receive no new label.

To leave a cover unnumbered, start the selected range at document page 2 and enter 1 as the first number. The cover remains outside the numbering range.

At 12 points, the label 123 has a 20.016-point advance. If a selected crop and margin leave too little room for any complete label, the operation fails instead of shrinking or skipping it.

Compatibility and placement limits

Use one supported PDF 1.0–1.7 with 1–500 pages. Encrypted or signed files, forms, annotations, tagged PDFs, attachments, active features and other unsupported structures are rejected rather than removed or repaired.

Choose one continuous page range and a positive first number up to 999,999,999. The final label must also fit that limit. PDF user units other than the normal value 1 are unsupported.

The tool cannot find empty space or detect previous printed numbering. New labels can overlap existing content; changing the position or margin may be necessary. Running it again adds another set of labels.

Saving rewrites the document as PDF 1.7. File size and internal serialization can change. This is not byte-preserving editing, PDF/A or PDF/UA certification, signature preservation or a guarantee of identical rendering in every reader.

Local processing and current results

The PDF is processed locally in a browser worker. Its contents and settings are not uploaded or stored by this tool, and changing the file or settings removes the previous download. Cancelling stops the owned worker.