No file size limits — merge PDFs of any size
Most online PDF mergers cap file sizes at 10-50MB. PDF Guru has no such limits — merge PDFs of any size. Since processing happens in your browser, the only limit is your device's available RAM. Modern computers and phones handle files up to several hundred megabytes without issues. For very large files (500MB+), we recommend closing other browser tabs to free up memory. Merge those large CAD drawings, high-resolution photo books, or comprehensive technical manuals without hitting file size restrictions.