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Merge PDF
Combine multiple PDFs into one file
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Drag & drop your files
or click the button below
Accepted: PDF
How to use Merge PDF
- 1Drop or select all PDF files you want to merge
- 2Arrange files in the desired order by dragging
- 3Click Merge PDFs - processing happens in your browser
- 4Download the merged PDF instantly
Tips & Best Practices
- •You can merge up to 50 PDFs at once
- •All processing is done locally in your browser - no uploads
- •Rearrange files by dragging before merging
- •The file size of merged PDF is approximately the sum of all source files
Frequently Asked Questions
Is there a limit on file size?
Technically no, but very large files (100MB+) may be slow. Browser memory limits apply.
Can I merge encrypted PDFs?
Unencrypted PDFs only. If your PDF is encrypted, you'll need to decrypt it first.
Will the file order matter?
Yes, files merge in the order shown. Drag to rearrange before merging.
Privacy: All processing happens in your browser. Your files never leave your device or are uploaded to any server.
ZapFiles is free thanks to advertising · No account needed · Files processed locally