Question 1

Are my files uploaded to a server?

Accepted Answer

No — all processing happens entirely in your browser using the pdf-lib JavaScript library. Your PDF files never leave your device, ensuring complete privacy.

Question 2

What is the maximum file size supported?

Accepted Answer

There's no hard limit imposed by the tool. However, very large PDFs (hundreds of MB) may be slow to process depending on your device's memory and processing power.

Question 3

Can I merge password-protected PDFs?

Accepted Answer

The tool attempts to load encrypted PDFs with permission to read (ignoreEncryption flag), but heavily protected files may fail. Remove password protection before merging if you encounter issues.

Question 4

How does the page range syntax work for splitting?

Accepted Answer

Use comma-separated page numbers or ranges. For example: '1-3, 5, 8-10' extracts pages 1, 2, 3, 5, 8, 9, and 10. Page numbers start at 1.

Question 5

How effective is the PDF compression?

Accepted Answer

Compression effectiveness depends on the PDF content. Files with many redundant objects or unoptimized structure compress well (10–40%). PDFs that are already optimized may see minimal reduction. For image-heavy PDFs, compression works best.

Question 6

Does splitting a PDF affect quality?

Accepted Answer

No. Pages are extracted as-is using pdf-lib's copy mechanism, so there's no re-encoding or quality loss. The extracted pages are identical to the originals.

Question 7

Can I merge more than 10 PDFs at once?

Accepted Answer

Yes — there's no limit on the number of PDFs you can merge. However, merging many large files simultaneously may require significant memory.

PDF Tools Suite

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