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Merge PDF Online
Combine multiple PDF files into one — free, private, no signup.
✓ No server upload✓ No signup required✓ Open source✓ Unlimited file size
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Drop your files here
or click to select from your computer
PDF files

Frequently Asked Questions

Is my PDF uploaded to a server?
No. All merging runs locally in your browser.
How many PDFs can I merge?
There is no hard limit. You can merge as many PDFs as your device memory allows.
Will formatting be preserved?
Yes. Pages are copied exactly as they are — no re-rendering or quality loss.
Can I reorder pages?
Pages are merged in the order you select files. Choose files in the desired order.
Is there a file size limit?
No hard limit. Large combined files may be slower to process.