Secure and Free Online File Converter for Documents, Images, Audio, and Video with Batch and Offline Options

CDKM.com is a free, browser-based file conversion platform designed with a minimalist and user-friendly interface that supports a wide range of file formats. Built on advanced open-source technologies like LibreOffice, ImageMagick, and FFMpeg, it offers seamless and efficient file conversion without requiring software installation or account registration.

Key features include:

All-in-One Conversion: Users can upload files, set conversion options, and download the results all on a single webpage, eliminating the need to navigate across multiple pages.
Extensive Format Support: The platform supports numerous formats for documents (PDF, DOCX, EPUB), images (JPG, PNG, SVG), audio (MP3, WAV), and video (MP4, MOV). It also allows batch conversions, enabling up to 20 files to be processed simultaneously.
Offline Conversion Option: For files larger than 200MB or those containing sensitive information, an offline conversion mode runs entirely within the user’s browser, ensuring privacy and security.
Privacy and Security: Data transmission is protected by Transport Layer Security (TLS) with 128-bit SSL encryption. Uploaded files are stored temporarily and deleted automatically after two hours, with an option for users to delete them manually.
Mobile-Optimized Design: The platform’s mobile-first approach ensures a smooth and intuitive experience on smartphones and tablets.

Use cases cover document conversions (e.g., DOCX to PDF, EPUB to MOBI), image processing (e.g., JPG to PNG, GIF to SVG), and audio/video editing (e.g., MP3 to WAV, MOV to MP4), including cutting, merging, and compressing multimedia files.

Limitations include a file size cap of 40MB for documents and 200MB for other file types, with offline conversion recommended for larger files. Converted files remain available for download for two hours before automatic deletion.

Overall, CDKM.com offers a versatile, secure, and convenient online file conversion solution suited for both casual users and professionals seeking quick and reliable file format changes.