Merge two PDFs alternately (1a, 1b, 2a, 2b…) — made for double-sided scans of front and back sides.
or drop pdf files here
Merge two PDFs alternately (1a, 1b, 2a, 2b…) — made for double-sided scans of front and back sides.
Drag & drop your files into the tool above, or click Choose Files to browse.
Reorder or configure your files as needed before processing.
Click the action button to process your files.
Download your result instantly — everything runs in your browser.
Built for speed, privacy and reliability — on any device.
Upload and process multiple files at once. Drag to reorder before you run the operation.
Everything runs locally in your browser. Your files never leave your device — complete privacy guaranteed.
Use Interleave PDFs on Windows, Mac, Linux, iOS or Android — any modern browser works perfectly.
No account needed. Interleave PDFs is completely free with no file size limits for standard documents.
Output files follow the PDF specification, ensuring compatibility with Adobe Reader, Preview and all major viewers.
Yes, Interleave PDFs is completely free. There are no hidden fees, subscriptions or account requirements. Just open the tool and start.
Interleave PDFs runs entirely in your browser. Your files are never uploaded to any server — they stay on your device the whole time, so your data is always private.
There is no hard file size limit enforced by the tool. Very large files may take longer to process depending on your device's memory and browser performance.
Yes. Output files conform to the PDF standard and open correctly in Adobe Acrobat, Adobe Reader, macOS Preview, Chrome, Firefox and all other major PDF viewers.
The tool works in all modern browsers including Google Chrome, Mozilla Firefox, Microsoft Edge, Safari and Opera. We recommend keeping your browser up to date for the best experience.
Step-by-step guide with screenshots and tips.
Read guide →Step-by-step guide with screenshots and tips.
Read guide →Step-by-step guide with screenshots and tips.
Read guide →Step-by-step guide with screenshots and tips.
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