About COB
COB (Converter Bulk) is a free online file converter that allows you to convert multiple files at once. Unlike other converters that limit you to one file at a time, COB lets you process up to 5 files simultaneously.
Our Mission
We believe file conversion should be free, fast, and private. Most online converters upload your files to their servers, which can be a privacy concern for sensitive documents. COB processes most conversions directly in your browser – your files never leave your device.
How It Works
Image to PDF, PDF merging, splitting, and compression all happen in your browser using JavaScript. Your files stay on your computer.
Complex conversions like Word, PowerPoint, and Excel to PDF require server processing for best quality. Files are encrypted and deleted immediately after conversion.
Supported Conversions
To PDF
- • Word (.docx, .doc)
- • PowerPoint (.pptx, .ppt)
- • Excel (.xlsx, .xls)
- • Images (.jpg, .png, .webp)
- • HTML files
From PDF
- • PDF to Images
- • PDF to JPG
- • PDF to PNG
PDF Tools
- • Merge PDFs
- • Split PDF
- • Compress PDF
Contact
Have questions or feedback? We'd love to hear from you. Visit our Contact Page to get in touch with our team.