Privacy/Data Security 1. Privacy/Data Security: You upload your files to a third-party server. While most reputable services ensure file deletion after a certain period of time, there may be concerns about sensitive information. 2. Size/Duration Limitations of Online Tools: Free versions may have restrictions on MP4 file size or GIF duration. 3. Conversion Speed ​​of Online Tools: May be slower if the servers are busy or your connection is poor.