Merge PDF Files Online — Batch Combine 100+ Documents

Combine multiple PDF files into a single, professional document in seconds. CocoConvert merges your PDFs in the exact order you upload them, preserving all formatting, embedded fonts, bookmarks, hyperlinks, and annotations. No content is altered — pure page-by-page concatenation.

Need to merge a board pack with 50 appendices? An invoice bundle for accounting? A thesis with separately-formatted chapters? Pro users can merge up to 100 PDFs in a single batch, while Business API users get 200. Each file can be up to 5 GB.

The merge engine uses qpdf under the hood — a C++ PDF library trusted by enterprises worldwide. It handles encrypted PDFs, linearized (web-optimized) files, and documents with complex font subsetting without issues.

All files are processed on secure servers in Germany, encrypted in transit, and permanently deleted within 24 hours. No account required, no watermarks, no page limits.