Format Factory Portable

The current version (5.17+) is safe, provided you download it from the official website .

Format Factory is a free, all-in-one multimedia conversion tool for Windows that allows you to change the file extensions of videos, audio, images, and documents. It is highly regarded for its versatility, supporting a vast range of formats like MP4, MP3, JPG, and even PDF. Core Capabilities Video Conversion: Format factory

Easily switch between MP3, WAV, FLAC, and AAC while maintaining original clarity. The current version (5

3GP, ASF, AVI, DAT (VCD), FLV, MKV, MOV, MP4, MPG, OGM, RMVB, SWF, TS, VOB (DVD), WMV, WebM. The current version (5.17+) is safe

Format Factory is not the fastest (HandBrake is slightly quicker for H.264), but it is competitive. The quality is excellent for free software.