How to Add Page Numbers to a PDF

Why add page numbers

Unnumbered packets become hard to discuss. Reviewers say “the third page after the chart,” printers lose sequence after a paper shuffle, and students cannot cite a stable page. Adding numbers creates a shared reference without rebuilding the document in a word processor.

Numbering is usually a finishing step. Organize or merge first so the final order is stable, then apply numbers once.

When to use this tool

Use Add Page Numbers when your PDF is within 25 MB and 100 pages and you need visible numbering for print or review. It is less ideal when a document is already certified, signed, or locked against modification—stamping numbers creates a new PDF and can affect signature validity.

Exact limits and controls

The source PDF may be up to 25 MB and 100 pages. On-page previews show up to the first 30 pages so the browser stays responsive on longer files. You can place numbers in six positions: top-left, top-center, top-right, bottom-left, bottom-center, and bottom-right.

Formats include plain numbers, zero-padded values, a Page label style, and page-of-total style numbering. You can set a start number, skip the first page (useful for covers), or number only custom ranges. Font size ranges from 8 to 72 points, margin from 12 to 72 points, and color uses a hex value such as #000000.

• File: 25 MB, 100 pages maximum.
• Preview: first 30 pages.
• Positions: six top/bottom left-center-right options.
• Font size: 8–72.
• Margin: 12–72.
• Selection: all pages, skip first, or custom ranges.

How to add page numbers on Looty Tools

If numbers do not fit, reduce font size or margin conflicts by adjusting placement. Confirm cover handling: skip first when page 1 should stay unnumbered, or start at a custom value when your packet continues a larger sequence.

1. Open Add Page Numbers at /tools/add-page-numbers-to-pdf.
2. Upload a PDF within the limits.
3. Choose position, format, start number, font size, color, and margin.
4. Select all pages, skip first, or enter custom ranges such as 1-5, 8, 10-12.
5. Review the preview (up to 30 pages), then download the numbered PDF.

Privacy

Adding page numbers is designed to run locally in your browser. Your PDF is not uploaded to Looty Tools for this workflow. You can number internal drafts on-device and download the stamped file when ready.

Signatures, PDF-A, mistakes, and expectations

Writing page numbers into a PDF produces a new file. Digital signatures on the original may no longer validate after modification. Archival PDF-A workflows can also be sensitive to edits—if you must preserve PDF-A compliance or certification, use a process approved for that standard instead of a general numbering utility.

Numbers are overlays based on your settings; they do not renumber bookmarks automatically or fix scanned “page 3 of 20” text already baked into images. If placement collides with existing footers, choose another position or margin. Password-protected PDFs need to be unlocked first.

Because previews show up to 30 pages, longer documents still need a full download check. Spot-check a late page to confirm the start number, skip-first behavior, and margin still look right near the end of the file.

Caution: modifying a signed or PDF-A document can break signatures or archival conformance. Number a working copy when preservation rules matter.

Choosing formats and ranges

Plain numbers are clean for most print packets. Page-of-total helps reviewers see progress through a packet. Padded formats can help when you sort exported page images later. Match the format to how people will refer to pages in conversation or filenames.

Custom ranges are useful when appendices should be numbered differently from the main body, or when only a subset of pages will be printed. Keep range syntax tidy—1-5, 8, 10-12—and avoid listing the same page twice.