About PDF Merger

Merge multiple PDFs into a single document. Part of the DevTools Surf developer suite. Browse more tools in the PDF collection.

Use Cases

• Combine invoice pages into a single document for filing
• Merge contract sections from different authors
• Assemble multi-chapter ebooks from individual PDF chapters
• Create submission packets by combining forms and attachments

Tips

• Drag and drop multiple PDFs to combine them in order
• Reorder files before merging to set the page sequence
• Merge scanned documents with cover pages into a single PDF

Fun Facts

• PDF supports incremental updates, meaning merged PDFs preserve each original file's internal cross-reference table as a new revision layer.
• The PDF specification defines over 1,000 pages of format details in ISO 32000-2:2020, making it one of the most complex document standards.
• Adobe Acrobat, the first commercial PDF editor, was released on June 15, 1993, at a price of $695 for the full version.

FAQ

How many PDFs can I merge?

Dozens comfortably; the limit is your browser's memory. For 100+ PDFs, use command-line tools (pdftk, qpdf).

Is the page order preserved?

Yes — in the order you arrange them. Drag to reorder before merging.

Are bookmarks preserved?

Yes — bookmarks and outlines from source PDFs are merged into the combined document's outline.

Can I insert blank pages between?

Toggle 'add blank between files' to separate sections visually. Useful when merging contracts or report sections.