Merge PDF
Combining two or more separate PDF files into a single document, preserving their original content and order.
Merging PDFs is the process of combining multiple separate `.pdf` files into one unified document. It's one of the most common PDF tasks — assembling a cover letter and resume, combining monthly invoices for an annual summary, or consolidating a multi-part report into a single shareable file.
How merging works
Every PDF is internally a collection of pages plus shared resources (fonts, images). When you merge, a PDF tool copies the page list from each source file into a new output file and brings along each page's resources. The original files aren't modified — merging creates a new third file.
Key characteristics:
- Lossless — merging does not re-render or re-compress pages. The quality is identical to the sources.
- Preserves metadata — page-level content like embedded fonts, vector graphics, hyperlinks, and form fields all survive the merge.
- Order matters — the sequence you add the files in determines the output order. Reorder before clicking Merge.
- Bookmarks carry over — most tools preserve the bookmarks/outline from each input.
Tools
- Merge PDF combines any number of PDFs in the browser — no upload, no size limits beyond your device's memory.