Merge front and back pages of a scan
Scanned a double-sided document with a single-sided scanner? Combine the front-pages PDF and back-pages PDF into one correctly ordered PDF.
1. Front pages (odd: 1, 3, 5…)
Choose PDF
Drop here or click to choose
Files stay on your device — nothing is uploaded
2. Back pages (even: 2, 4, 6…)
Choose PDF
Drop here or click to choose
Files stay on your device — nothing is uploaded
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Your file is processed in your browser and never uploaded.
How does it work?
- 1
Choose the front pages
Drag the PDF with odd pages (1, 3, 5…) here.
- 2
Choose the back pages
Drag the PDF with even pages (2, 4, 6…) here.
- 3
Merge & download
The pages are combined into one double-sided document.
Frequently asked questions
My back pages are in reverse order, now what?
Leave the "back pages are reversed" option checked. Most scanners flip the stack, putting the back pages in reverse order.
What if my scan order is different?
Uncheck the option if your back pages are already in the correct order.
Are my files uploaded?
No. Everything happens in your own browser. Your file never leaves your device and is not stored anywhere.
Is it free?
Yes, completely free, without watermark or account. The site is paid for by ads.
More reading
Why in the browser?
PDFrust runs entirely in your browser using WebAssembly and modern JavaScript libraries such as pdf-lib and PDF.js. Your file is never sent to a server — all processing happens locally on your device. This means your documents remain private by design, regardless of what they contain. There is no account required, no file size limit, and nothing is stored after you close the tab.
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