Merge PDF
Combine several PDF files into a single document in the order you want.
Drag & drop your files here
or pick from your device
Supported formats: PDF
How to use
- 1
Select or drag your PDF files into the area above.
- 2
Drag the files to arrange them in the order you want.
- 3
Click "Merge" and download the combined file.
About the Merge PDF tool
Merging PDF files is one of the most common everyday document tasks: a contract split into parts, scattered homework files, monthly invoices you want archived as one file, or book chapters received separately. Instead of installing heavy software or paying for subscriptions, this tool merges any number of PDF files into a single document within seconds, straight from your browser on any device — desktop or mobile.
The fundamental difference between this tool and most popular PDF-merging sites is that your files never leave your device. Other sites upload your documents to their servers for processing and send them back — meaning your contracts, financial data, and personal documents pass through third-party machines. Here, merging happens entirely inside your browser using local processing, so there's no upload, no server round-trip, and no possibility of anyone seeing your files' contents.
The tool preserves the original page quality exactly — no re-compression, no resolution loss — and gives you full drag-and-drop control over file order before merging. If you ever need the reverse, try the Split PDF tool to break a document back into parts.
When do you need this tool?
Consolidating work documents
Combine a contract with its annexes and attachments into one file before sending it for signature or archiving, instead of emailing five separate attachments that get lost in inboxes.
Research papers and assignments
Merge the cover page, introduction, chapters, and references you wrote as separate files into one submission-ready paper in the right order.
Archiving invoices and receipts
Collect a month's or year's invoices into one file that's easy to store, search, and send to your accountant, instead of dozens of scattered files.
Bundling official documents for applications
Visa, university, and job applications often require a single PDF — merge your passport scan, certificates, and bank statements into one tidy document.
Why ToolsRio?
Real privacy
All processing happens inside your browser. Your files are never uploaded to any server, and nobody can see them — not even us.
Free without limits
No watermark, no file-count limits, and no hidden paid tiers.
Instant speed
No waiting for uploads and downloads to a remote server — processing starts immediately on your device.
No sign-up
No account, no email, no annoying ads. Open the tool and use it right away.
Frequently asked questions
Are my files uploaded to a server?+
No. Merging happens entirely inside your browser and your files never leave your device.
Is there a limit on the number of files?+
There is no artificial limit, though very large files depend on your device's memory.
Is the tool free?+
Yes, completely free and without a watermark.