Merge PDF Files Online for Free
Combine multiple PDFs into a single document. Choose your files, arrange them in order, and download the result — no account required, and your files stay in your browser.
How to Merge PDF Files Online for Free
- 1
Choose your PDFs
Select or drag in two or more PDF files. They open directly in your browser.
- 2
Put them in order
Use the up and down controls to arrange the files in the order you want them combined.
- 3
Merge and download
Click Merge to combine the files into one PDF and download it right away.
Combining Files in the Right Order
Files are combined in the order they appear in the list, top to bottom. Use the up and down arrows next to a file to move it, or the trash icon to remove it before merging. Each file shows its page count once it's checked, so you can confirm the result before combining.
Limits and Supported Files
You can merge up to 20 PDF files, or a combined total of 100MB, in a single merge — the same 25MB per-file limit as the signing tool applies to each individual file. Password-protected, corrupted, or otherwise unreadable PDFs are flagged with a specific error rather than silently skipped.
Merging Without Uploading Your Documents
Merging happens entirely in your browser using the pdf-lib library. There is no document-upload step — your files are read, combined, and offered back to you for download without ever being transmitted to a server. See sign a PDF without uploading for the same explanation in more detail, and how to verify it yourself.
Frequently Asked Questions About Merging PDFs
Yes. Merging PDFs is free, doesn't require an account, and doesn't add a watermark.
No. The merge tool combines your PDFs locally in your browser using the pdf-lib library — your files' contents are never sent anywhere.
You can combine up to 20 files, or a combined total of 100MB, in one merge.
Yes. Use the up and down arrow buttons next to each file in the list to move it before merging.
That file is flagged with a clear error in the list and isn't included — you'll need to remove it or resolve the issue before merging the rest.