Difference between MP4 and MP3:
| MP4 | MP3 |
| MP4 is a digital multimedia container format | Mp3 is an audio coding format |
| Extension used is .mp4 | Extension used is .mp3 |
| MP4 can handle a number of media, such as audio, image, video, text. | MP3 can handle only one type of media, which is an audio file. |
| Devices which are made for MP4 are both audio and video file players. | Devices that are made for MP3 are simply an audio file player. |
| MP4 is a compressing technology with decreasing the quality of audio and video both. | MP3 is also a compressing technology but without decreasing the quality. |
| MP4 is extended from Apple QuickTime .mov and MPEG-4 Part 12 | MP3 is extended from MP2 |
| It is new and released in 2003. | It is released in 1994. |
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