How Do You Merge PDF Files?
You merge PDF files by adding them to QuickCatPDF's Merge PDF tool, putting them in order and clicking Merge PDF. The files are combined into one PDF in your browser, with the original quality and selectable text kept, and a bookmark for each file so readers can jump between the parts.
Nothing is uploaded, which matters for contracts, statements and reports.
How to Merge PDF Files With QuickCatPDF
Combining PDFs takes four steps.
- Click Select PDF files or drop your PDFs on the page. Add more at any time with Add PDF.
- Put the files in order in the numbered file list using the up and down arrows.
- Fine-tune if needed: rotate, move or delete single pages in the page grid below.
- Click Merge PDF, then Download PDF.
Add a bookmark for each file is on by default; untick it in the settings if you don't want bookmarks.
Why Use QuickCatPDF to Combine PDF Files?
QuickCatPDF merges PDFs without re-processing the pages. Each page is copied as it is, so text stays searchable, images keep their quality, and the merged file is usually about the size of the originals added together. In our test, three PDFs with 15 pages in total merged in about a second, with three bookmarks.
The page grid lets you do more than a simple join: remove a cover page, rotate a scanned page, or move one page between files before saving.
Your files never leave your device, and the tool works offline after your first visit.
Can You Merge Specific Pages From Several PDFs?
Yes. After adding the files, delete the pages you don't need from the page grid, and drag the remaining pages into any order, even mixing pages from different files. The saved PDF follows exactly what the grid shows.
For bigger reorganising jobs, Organize PDF Pages adds duplicate, blank page and reverse-order tools, and Remove Pages from PDF can delete pages by number.
What Happens to Bookmarks and Page Sizes?
With bookmarks on, the merged PDF gets one bookmark per file, named after the file, pointing to its first page. Most PDF readers show them in a sidebar, which makes long merged documents easy to navigate.
Pages keep their own sizes and orientation, so a landscape spreadsheet and portrait letters can sit in the same PDF. To merge images rather than PDFs, use Image to PDF.
Frequently asked questions
Is there a free way to merge PDF files online?
Yes, QuickCatPDF merges PDF files free, with no sign-up, no watermark and no daily limit.
Does merging reduce quality?
No, pages are copied without changes, so text, images and quality stay exactly as they were.
How many PDFs can I merge?
Up to 20 PDFs and 2,000 pages at once, with files up to 200 MB each.
Can I merge password-protected PDFs?
Not yet. Remove the password from the protected file first; the tool tells you which file is protected.
Are my files uploaded?
No, the merging happens in your browser and nothing is sent to a server. More tools are on the PDF Tools page.
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