Convert Multiple Files
In One Click
COB is a free bulk file converter. Convert up to 5 Word, PowerPoint, Excel, or image files to PDF at once. No limits, no watermarks.
Convert to PDF
Most PopularUp to 5 files at once
Up to 5 files at once
Up to 5 files at once
Up to 20 files at once
Up to 5 files at once
Convert from PDF
PDF Tools
Why Choose COB?
Bulk Conversion
Convert up to 5 files at once. Save time by processing multiple documents simultaneously.
Privacy Protected
Most conversions happen in your browser. Your files never leave your device.
Lightning Fast
Client-side processing means instant results. No waiting for server queues.
Free Online PDF Converter
COB (Converter Bulk) is a free online tool that allows you to convert multiple files to PDF format quickly and easily. Whether you need to convert Word documents, PowerPoint presentations, Excel spreadsheets, or images, COB handles it all with support for bulk conversion of up to 5 files at once.
Unlike other online converters, COB processes most file types directly in your browser, ensuring your sensitive documents stay private and secure. There's no need to create an account or install any software – just upload your files and download the converted PDFs.