Click to upload or drag & drop PDF files
Select two or more PDFs · processed locally
What does merging PDFs actually do?
Merging combines the pages of two or more separate PDF files into a single output file, in whatever order you arrange them. Nothing about each page's content is altered — text, images, and formatting are copied across exactly as they appeared in the source file. The result is one document containing every page from every file you added, back to back.
Common reasons to merge PDFs
- Combining a cover letter, resume, and portfolio into one file before submitting a job application
- Stitching together individually scanned pages into one readable PDF
- Assembling a multi-section report exported from different sources
- Bundling invoices, receipts, or contracts into a single file
Use the ↑ and ↓ buttons next to each file to set the exact order before merging.
Frequently asked questions
Does merging preserve bookmarks and links?
Page content, including any text, images, and internal formatting, is copied over intact. However, document-level bookmarks (the outline/table of contents shown in a PDF viewer's sidebar) and cross-document links generally are not carried over automatically, since each source file's outline structure doesn't map directly onto the new combined page order. Links that point to external URLs on the page itself are preserved since they're part of the page content.
Is there a file size or page limit?
There's no hard-coded limit in the tool itself — it can merge as many files as you add. In practice, the limit is your browser's available memory, since every file is loaded and processed on your device. Merging a handful of typical documents (a few MB each) works instantly; merging dozens of very large, image-heavy PDFs may slow down or use significant memory.
What happens if the PDFs have different page sizes?
Each page keeps its own original size in the merged file — merging doesn't resize or crop pages to match. So if you combine a document with A4 pages and one with US Letter pages, the output PDF will simply contain pages of both sizes, which is completely valid and will display and print fine, just with a visible size change between pages.
Are my files uploaded to a server to merge them?
No. All merging happens locally in your browser using a JavaScript PDF library — your files are never transmitted anywhere, and the combined file is assembled and downloaded directly on your device.