FREE CLIENT-SIDE PDF UTILITY SUITE
Add Page Numbers to PDF Online - Free PDF Numbering Tool
Insert formatted page numbers into PDF documents directly in your browser. Choose header or footer placement, starting numbers, format styles (e.g. Page 1 of N), and margins with zero server file uploads.
Client-Side PDF Page Numbering Tool
Add custom header or footer page numbers across your entire document.
NUMBERING STYLES
Professional Pagination for Formal Reports
Configure headers, footers, and page counting options to match enterprise document guidelines.
POSITIONING
Six Header & Footer Anchors
Position page numbers across Top Left, Center, or Right (headers), or Bottom Left, Center, or Right (footers) to cleanly align with company document templates.
STYLES
Page N of Total Formatting
Support formal pagination styles including Page 1 of 12, 1 / 12, or simple single numerals. Clear page totals help readers confirm document completeness.
COVER SHEETS
Automatic Cover Sheet Exemption
Enable the Skip First Page toggle to keep front cover artwork uncluttered while starting sequential numbering cleanly on page 2.
TECHNICAL ARCHITECTURE
Precision Coordinate Math in PDF Geometry
How point measurement, baseline alignment, and media margins ensure consistent placement across varied sheet sizes.
Unlike web browsers where CSS coordinates measure downward from the top-left corner, PDF user space coordinates originate at the bottom-left corner of the page boundary box (x = 0, y = 0). Calculating accurate top-header positions requires querying each page /MediaBox or /CropBox height and subtracting margin point offsets.
Furthermore, when documents contain mixed paper sizes (such as a US Letter portrait page followed by an 11 × 17 inch architectural landscape foldout), hardcoded coordinates will position numbers in the wrong location or off the page entirely. Our numbering tool inspects the exact dimensional bounding box of each individual page in the document loop:
- Width & Height Introspection: Uses
page.getSize()to read true point dimensions per sheet. - Font Width Measurement: Evaluates font glyph width metrics via
font.widthOfTextAtSize()to achieve mathematical centering. - Safe Margin Buffers: Enforces standard 36-point (0.5 inch) printable margin offsets to prevent printer clip-off during commercial printing runs.
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SPLIT
Split PDF
Separate document pages or custom page ranges into individual PDF files or a ZIP archive.
TASK FINDER
What do you want to do with your PDF?
Select an action below to jump directly to the right browser-based utility without complex menus.
MERGE
Combine PDFs
Merge multiple PDF files into one clean document with custom order.
SPLIT
Split a PDF
Separate document pages or custom page ranges into individual PDF files.
COMPRESS
Reduce PDF Size
Compress PDF file size for email and web transfer while retaining clarity.
CONVERT
Convert PDF to Images
Turn PDF document pages into high-resolution JPG or PNG image files.
CLEAN
Remove PDF Pages
Delete unwanted, blank, or outdated pages from your document in seconds.
ORGANIZE
Rearrange PDF Pages
Move, rotate, duplicate, or reorder pages in a visual workspace.
EXTRACT
Extract PDF Pages
Generate a focused new PDF containing only your selected pages or ranges.
ORIENTATION
Rotate PDF
Permanently rotate inverted or landscape pages 90, 180, or 270 degrees.
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Reduce JPG, PNG, and WebP file sizes before embedding them into PDF documents.
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Scale image dimensions precisely to fit document layouts and presentation slides.
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Convert visual assets between WebP, PNG, JPG, and AVIF formats entirely client-side.
FREQUENTLY ASKED QUESTIONS
Frequently Asked Questions About PDF Page Numbers Online
Clear answers regarding client-side processing, file security, PDF formatting rules, and browser performance.
FAQ 01
Can I start page numbering at a number other than 1?
Yes. You can customize the Start Numbering At field to any integer (for example, starting at 15 for an appendix section in a larger binder).
FAQ 02
Will page numbers align properly if my PDF has mixed page sizes?
Yes. The engine reads individual page dimensions dynamically, recalculating margin offsets so headers and footers align consistently across both portrait and landscape sheets.
FAQ 03
Does adding page numbers recompress or degrade document images?
No. Page numbering adds vector text drawing operators into the page content stream without rasterizing existing document layers.
FAQ 04
Can I position page numbers in the top header instead of the footer?
Yes. You can choose from six distinct positions: Top Left, Top Center, Top Right, Bottom Left, Bottom Center, or Bottom Right.
FAQ 05
Are my uploaded PDF files sent to your servers?
No. Stamping executes 100% locally within your browser memory. Your files are never uploaded or stored remotely.
FAQ 06
Can I exclude the cover page from being numbered?
Yes. Simply check the Skip first page checkbox. The cover page will remain blank, and sequential numbering will begin on page 2.
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