Is Interleave PDFs free to use?

Yes. This tool is available for free with no account required for basic usage.

Are files secure when using Interleave PDFs?

Uploaded files are processed temporarily and automatically removed after one hour.

How do I get the best result with Interleave PDFs?

Use clean source files and review output after processing, especially for complex interleave pdfs workflows.

Do I need an account or signup?

No. PDFBaba does not require signup for these tools. Upload, process, and download without creating an account.

Is there a watermark on the output?

Output from this tool is not watermarked by PDFBaba. You get a clean file suitable for work and sharing.

What is the maximum file upload size?

The default limit is 100MB per file on the server. Your host or administrator can change this via environment configuration. If a file fails to upload, try compressing or splitting it first.

Can I use this tool on my phone or tablet?

Yes. PDFBaba works in modern mobile browsers. Very large files or complex previews may be smoother on a desktop with a stable connection.

Is there a daily usage limit?

To keep the service fast for everyone, rate limits may apply per IP. Typical personal use is rarely affected. If you hit a limit, wait briefly and try again.

What if my PDF is password-protected?

For Interleave PDFs, use an unlocked PDF when possible. If the file asks for a password in a reader, unlock it with our Unlock PDF tool first, then run Interleave PDFs on the decrypted file.

Online PDF Tool

Interleave PDFs

Merge two PDFs with alternating pages (ZIP mode) — useful for double-sided scans.

Why use Interleave PDFs?

Double-sided scanning workflows sometimes produce odd pages in one file and even pages in another. Interleaving merges two PDFs by alternating pages—ZIP mode in pdfcpu—so the combined file reads naturally. PDFBaba requires exactly two inputs and recommends modern PDF versions for compatibility. The tool is free without signup, with short retention. If you simply need end-to-end concatenation, Merge PDF is simpler; interleaving solves a specific scan pattern problem.

Supported files & limits

Exactly two PDFs for alternating-page merge. The default upload limit is 100MB per file; administrators can raise or lower this via server configuration. PDF 1.7 recommended for best compatibility.

Privacy & data retention

PDFBaba is built for quick tasks: your uploads and generated downloads are kept only long enough to process your request and are automatically deleted after about one hour. We do not require signup for these tools, and we do not use your documents to train AI models. For full details on cookies, analytics, and legal terms, read our Privacy Policy.

Features

Exactly two PDFs

pdfcpu zip merge

PDF 1.7 recommended

How to use

1
Upload your source file.
2
Click interleave to process the document.
3
Download the output file.

Related tools

merge pdf organize pdf collect pdf