Need to send a large PDF by email or upload it to a website? Use our Compress PDF Online tool to make PDF files smaller in a few clicks, making them easier to share and store.
🔒 Private: your files are processed in your browser and are never uploaded.
How to Use
- Add your PDFs — drag several files onto the box, or click it and select multiple files. You can add more files later.
- Set the order — use the ↑ and ↓ buttons beside each file. Files are merged from top to bottom.
- Optionally change the output file name.
- Click Merge PDFs, then download the combined PDF.
Features / Benefits
- Unlimited files — combine as many PDFs as your device can handle.
- Easy reordering — move files up or down before merging.
- Page counts shown — see how many pages each file contains.
- Original quality — pages are copied as they are, with no re-compression.
- Private by design — merging happens inside your browser.
Detailed Information
The tool copies every page from each of your PDF files, in the order you choose, into one new PDF document. Because pages are copied rather than re-drawn, text stays sharp and selectable, and images keep their original quality.
Password-protected PDFs cannot be merged directly. Remove the password first with the PDF Unlocker, then add the file here.
Common Uses / Examples
- Combining scanned pages, invoices and receipts into one file for an expense claim.
- Joining a cover letter, resume and certificates into a single job application PDF.
- Building one document from several chapters or reports.
- Merging signed pages back into a complete contract.
Tips / Best Practices
- Check the order before merging — you can remove a file with the ✕ button.
- If your merged file is too large to email, run it through the Compress PDF tool.
- Merge first, then add page numbers so the numbering runs through the whole document.
- Rotate sideways pages with the Rotate PDF Pages tool before merging.
Privacy & Security
Your files are never uploaded. They are read and merged locally in your browser, and nothing is stored once you close the page. A processing library is loaded from a public CDN when you first use the tool.
Conclusion
Merge PDF Online is the fastest way to combine several PDF files into one clean document. Add your files, arrange them, and download — no software, no signup and no upload.
Frequently Asked Questions
How many PDFs can I merge?
There is no fixed limit in the tool. The practical limit depends on the memory of your device, so extremely large sets may need to be merged in smaller batches.
Will merging reduce the quality?
No. Pages are copied directly, so text, images and layout stay exactly as they were.
Can I merge password-protected PDFs?
Not directly. Remove the password using the PDF Unlocker first, then merge the unlocked files.
Can I change the page order inside a file?
This tool orders whole files. To reorder or remove individual pages, use the Extract PDF Pages and Delete PDF Pages tools.
Is my data safe?
Yes. Everything happens in your browser and your files are not sent to any server.