Merge PDF
Combine multiple PDFs into one file, in the order you choose — instantly, in your browser.
Drag & drop 2 or more PDFs here
or
.pdf · Up to 50 MB total · Processed in your browser
Files merge in this order — remove any you don't want:
0%
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About the Merge PDF tool
Merge PDF combines two or more PDF files into a single document using pdf-lib, a JavaScript PDF manipulation library, running entirely inside your browser. Add your files in the order you want them to appear, remove any with one click, then merge into one clean, downloadable PDF. There's no queue, no processing fee for larger files, and no cap on how many documents you combine short of the 50 MB total.
This is one of the most requested document tasks there is: combining scanned pages from a multi-session scan job, stitching together a multi-part report where each section was written in a separate file, assembling an invoice packet with a cover letter, receipts and a signed agreement, or simply tidying up a folder of related PDFs into one file before archiving or sending it off.
How the merge is performed
Behind the scenes, this tool loads each uploaded PDF's bytes directly into memory and creates a brand-new, empty PDF document using pdf-lib. It then walks through your files in the order they appear in the list, copying every page — its full vector content, embedded fonts and images — from the source document into the new one. Because pages are copied rather than rasterized, there's no quality loss: text stays crisp and selectable, and any embedded images keep their original resolution. Once every page has been copied across, the assembled document is serialized back into PDF bytes and offered to you as a single download.
Order matters — here's how to control it
The merged file follows the exact order your files appear in the upload list, top to bottom. If a file lands in the wrong position, remove it with the × button and re-add it — it will be appended to the end of the list, which is the simplest way to move something to the back. Plan your file selection order in your operating system's file picker (most let you Ctrl/Cmd-click files in the order you want) to get the sequence right on the first try.
Merge PDF: this tool vs. the alternatives
| Method | Cost | Privacy | Quality loss | File limit |
|---|---|---|---|---|
| QuickPDFHubPro (this tool) | Free | Runs in-browser, no upload | None — pages copied as-is | 50 MB combined |
| Adobe Acrobat | Subscription | Uploads to servers (online) | None | Plan-dependent |
| Print-driver merge tricks | Free | Local, but fiddly | Can re-rasterize pages | Manual, error-prone |
| Other online converters | Varies | Check if files are uploaded first | Varies | Varies |
Tips for the best results
- Select files in your OS file picker in the order you want them merged to save re-arranging afterward.
- Merging a lot of scans? Run Compress PDF on the result if the combined file is too large to email.
- Need to remove a few pages after merging? Try Split PDF to pull out just what you need.
- Double-check the file list order right before clicking Merge — it's the only step that's easy to miss.
Key features
Order preserved
Files merge in the exact order you add them.
100% private
Merging happens on-device — no upload required.
Unlimited files
Merge as many PDFs as fit in 50 MB total.
Step-by-step guide
- 1
Drag two or more PDFs into the box above, in the order you want them merged.
- 2
Remove any file you don't need with the × button.
- 3
Click Merge PDFs and download your combined document.
Benefits
No file uploads — merging happens on-device
Bookmarks and page order are preserved
Reorderable, removable file queue before merging
No watermark, no account, no daily limits