PDFにページ番号を追加 – 無料オンライン

Add page numbers to PDF — free, online, no upload required

Need to add page numbers to a PDF for a report, thesis, legal document, or ebook? This tool stamps numbers on every page with your chosen position, font size, and starting number. All processing happens in your browser — your PDF never leaves your device.

How it works

1. Upload your PDF.
2. Choose the position (bottom center is the default), font size, and starting page number.
3. Click Add Page Numbers.
4. Download your numbered PDF.

Customization options

• Position: Bottom center, bottom right, bottom left, top center, or top right.
• Font size: 6 to 24 points (default 10).
• Start number: Default 1 — useful if the PDF is part of a larger document starting from, say, page 42.

Privacy

This tool processes everything locally in your browser. No upload, no server, no data collection. Safe for confidential documents.

When you need numbered pages on a PDF

Page numbers are mandatory for academic papers, legal filings, contracts, government submissions, and most printed handouts. If the original document was exported from Word, Google Docs, or LaTeX without page numbers, adding them later usually means re-opening the source — unless you only have the PDF. This tool adds numbers directly to the PDF without touching the source.

Position, format, and starting number

• Position — bottom-center, bottom-right, bottom-left, top-center, top-right, top-left.
• Format — "1", "Page 1", "1 / 12", "Page 1 of 12", or any custom format string.
• Start from — begin numbering at any page (skip cover pages, prefaces, or tables of contents).
• Font size and color — keep numbers subtle in body text or large for printed handouts.

Use cases

• Academic submissions — many journals require numbered pages in the submitted PDF.
• Court filings — most jurisdictions require continuous page numbering across the brief.
• Multi-author reports — when you merge contributions from multiple authors, add numbers after merging.
• Print prep — bound documents need numbered pages so a reader can quote sections accurately.

Privacy

The PDF is processed in your browser. Your document, the rendered numbers, and the output file all stay on your device. There is no upload, no telemetry, and no account required.

Complete PDF workflow with ToolAtom

This is one of ToolAtom's PDF tools. They all run in your browser with no upload, so you can chain them safely on confidential documents. Common workflows: scan or merge → rotate → add page numbers → watermark → protect, or unlock → edit metadata → re-protect for the next recipient.

• Rotate PDF — Fix the orientation of pages.
• Add Watermark — Stamp a DRAFT, CONFIDENTIAL, or brand mark.
• Protect PDF — Encrypt with a strong password before sharing.
• Unlock PDF — Decrypt a PDF whose password you know.
• PDF Metadata Editor — Clean up title, author, and keywords.
• PDF to Text — Extract plain text for analysis or accessibility.
• PDF to JPG — Render pages as images for slides or thumbnails.
• PDF Merger — Combine multiple PDFs into a single file.
• PDF Splitter — Break a large PDF into smaller files.
• PDF Compressor — Shrink file size for email and upload.

Related tools

People using this tool often also use Rotate PDF, Add Watermark to PDF, PDF Merger, and PDF Metadata Editor.