Merge multiple PDF files into one document for free, right in your browser. No sign-up, no uploads to a server — combine PDFs in seconds while your files stay private on your device.
Merge PDF
Combine multiple PDFs into one. Drag to reorder, then click Merge. Your files never leave your browser.
Quick answer
Merge PDF online free — combine two or more PDF files into one document, in the exact order you choose. Built for anyone who needs a single attachment instead of a folder of fragments: office workers, students and applicants. Files are processed entirely in your browser with pdf-lib and are never uploaded to a server — close the tab and they're gone.
Drag & drop PDF files here
or click to browse files
PDF files only — up to 20MB each
How to merge PDF files online
Merging combines two or more PDF files into a single document, with pages appearing in exactly the order you arrange them. Everything happens locally in your browser using client-side JavaScript — your files are never uploaded to any server, so even confidential documents stay on your device.
Add your PDF files
Drag and drop your files onto the tool above, or click to browse. There's no limit on the number of files you can combine — merge two documents or twenty.
Arrange them in order
Drag the files up or down until they're in the sequence you want. The order shown on screen is the exact order the pages will appear in the final merged PDF.
Merge and download
Hit the merge button and the combined PDF is built right in your browser — usually in a couple of seconds. Download it immediately; when you close the tab, everything is gone.
When merging PDFs comes in handy
Job applications
Sending a full application as one file? Combine your application letter and portfolio into a single clean PDF instead of attaching multiple documents.
Business paperwork
Bundle invoices, receipts and statements into one monthly packet for accounting — or assemble signed contracts into a complete agreement.
Study and research
Merge lecture slides, journal articles and your own notes into a single document that's easier to print, share and search than a folder of loose files.
Key features
Drag-and-drop reordering
Arrange files visually before merging — the row order on screen is exactly the page order in the result.
No file edits, no re-encoding
Pages are copied as-is into the new document, so text stays selectable and quality is untouched.
Instant local download
The merged PDF is built in your browser and saved straight to your device — no waiting on a server queue.
Supported formats
- Input: PDF files (.pdf), up to 20 files per merge
- Input: password-protected PDFs are accepted for merging (they must be openable)
- Output: a single standard PDF (.pdf) that opens in any PDF reader
Privacy and security
Limitations
- Up to 20 PDF files per merge; very large documents are limited by your device's available memory rather than a server.
- Password-protected files can be merged only if you can open them; DRM-protected documents may fail.
- Pages are copied in full — you cannot pick individual pages here (use Split PDF first, then merge the results).
- Bookmarks and form fields are not carried over; the output is a plain page sequence.
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Rotate pages 90°, 180°, or 270° — the whole document or just selected pages.
Frequently Asked Questions
Is it safe to upload my PDF files here?
Yes — all processing happens locally in your browser. Your files are never uploaded to any server and are deleted from memory after the operation completes.
Can I reorder the PDFs before merging?
Yes! Simply drag and drop the file rows to arrange them in the order you want, then click "Merge PDFs".
What is the maximum number of files I can merge?
You can merge up to 20 PDF files at a time, with each file up to 20MB in size.