What is the maximum file size supported?

Each PDF file can be up to 20MB. For merging, you can combine up to 10 PDF files at once.

Can I merge PDFs with different page sizes?

Yes, the merge tool handles PDFs with different page sizes. Each page retains its original dimensions in the merged output.

How does PDF compression work?

The compression tool optimizes the internal structure of the PDF by removing redundant data. The actual compression ratio depends on the content of the PDF.

Free Online PDF Tools

Merge multiple PDFs into one, compress PDF file sizes, or convert images to PDF — all for free. Every operation runs entirely in your browser using the pdf-lib library. No files are uploaded to any server, making this the safest way to handle your documents online.

Files are processed entirely in your browser. Nothing is uploaded.

Drop PDFs here or click to upload

PDF files • Max 20MB each • Up to 10 files