Combine Front & Back Scans
Interleave two PDFs (fronts + backs) into the correct page order. Private.
🔒 PDFs are processed on your device with pdf-lib — nothing is uploaded.
About Combine Front & Back Scans
Combine separate front-side and back-side scans into one correctly-ordered PDF, in your browser. If your scanner produced all the fronts in one PDF and all the backs in another, this interleaves them as front1, back1, front2, back2… No upload.
How to use Combine Front & Back Scans
- 1Drop the PDF of front sides.
- 2Drop the PDF of back sides.
- 3Download the interleaved PDF.
Why use Combine Front & Back Scans?
- ✓Anyone reorganising PDFs without desktop software or an upload.
- ✓Privacy-sensitive users — contracts and statements never leave the browser.
- ✓Quick one-off page edits before sending or printing.
Frequently asked questions
Why are my duplex scans in two files?+
Single-sided scanners often capture all front pages first, then all backs (sometimes in reverse). This tool merges them into the natural reading order.
What if the backs are in reverse order?+
Reverse the backs PDF first with the "reverse PDF" tool, then combine.
Are my scans uploaded?+
No — interleaving runs entirely in your browser.
Do the two PDFs need equal pages?+
Not necessarily; extra pages from the longer file are appended after the interleaved pairs.
Related Media & Files tools
PNG to JPG Converter
Convert PNG images to JPG in your browser — batch, instant and private. No upload, no watermark.
● LivePNG to WEBP Converter
Convert PNG images to WEBP in your browser — batch, instant and private. No upload, no watermark.
● LiveJPG to PNG Converter
Convert JPG images to PNG in your browser — batch, instant and private. No upload, no watermark.
● Live