How to Merge PDF Files Online for Free (Combine Multiple PDFs)
Combine multiple PDFs into one file for free in your browser. Drag-and-drop tutorial with tips for keeping bookmarks and metadata.
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Merging PDFs is one of the most-needed everyday office tasks. Whether you're combining contracts, invoices, or assignments, you can do it in 30 seconds online without installing Adobe Acrobat.
Step-by-step: merge PDF files
- Open a free PDF merger
- Drag and drop all PDFs you want to combine
- Reorder them by dragging the thumbnails
- Click Merge
- Download the combined PDF
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Keep bookmarks and metadata intact
- Use a tool that explicitly says 'preserves bookmarks'
- Avoid re-saving through 'Print to PDF' — it strips metadata
- Choose 'merge as-is' over 'flatten' to keep form fields
Common merging mistakes
- Forgetting to reorder pages before merging
- Mixing portrait and landscape without intent
- Not compressing the merged result (it can get huge)
Frequently Asked Questions
Is there a file limit?
Free tiers usually allow up to 20 files or 200 MB total.
Will my PDFs be deleted after merging?
Reputable tools delete files within an hour — check the privacy policy.
Can I merge password-protected PDFs?
You'll need to remove the password first using a free PDF unlocker.
Does it work on mobile?
Yes — drag-and-drop works on touch devices too.
Is there an offline option?
Yes, but for most users an online tool is faster and good enough.
Related tools & guides
Conclusion
Merging PDFs online is faster, free, and works on any device. Save the link to a trusted merger and you'll save hours every month.
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