To save the sound from an MP4, open Audio Extractor, choose your video, select MP3 or WAV and click Extract audio. You can keep the remaining audio from a short video or select a section by entering its start time and duration. The converter takes the first audio track; it does not separate speech, music or individual speakers.
Open Audio Extractor: Audio Extractor
Choose a supported video
The tool accepts uploaded MP4, MOV, M4V and WebM files up to 100 MiB. The file must contain a real video track and an audio track. Audio-only files are not supported, even if they have cover art or are renamed with a video extension. A silent video has no soundtrack to extract.
Choosing the file creates a local source preview. Some video codecs cannot play in your browser but may still be convertible on the server. A missing browser preview therefore does not always mean the input is invalid. The source must still be a complete, supported video within the tool’s limits.
Try a three-second MP4-to-MP3 example
Use a video at least five seconds long. To extract a section beginning two seconds into the recording and lasting three seconds:
- Choose the MP4 file.
- Set Start time (seconds) to 2.
- Set Duration (seconds) to 3.
- Choose MP3 under Audio format.
- Leave MP3 bitrate (kbps) at 192, or choose another available bitrate.
- Click Extract audio.
- Listen to Extracted audio, then choose Download audio.
The selected interval starts at two seconds and ends around five seconds, provided the source extends that far. If the requested duration runs past the audio’s end, the converter uses the available remainder rather than repeating it. Listen to the beginning and end of the result to check the selection.
Use MP3 or WAV for different workflows
What the checked example produced
The example was verified with a generated ten-second MP4 containing a 440 Hz tone. At Start 2 and Duration 3, MP3 at 192 kbps produced 73,196 bytes and a measured duration of 3.024 seconds. WAV produced 576,078 bytes and a duration of 3 seconds. Both decoded to audible, non-silent 48 kHz stereo audio matching the source tone. These are sample results, not expected bytes for every recording. MP3 encoder padding can add a small duration difference.
MP3 uses lossy compression. The available bitrate settings are 64, 96, 128, 192, 256 and 320 kbps. At the same duration, a higher selected bitrate generally produces a larger MP3. Raising the setting cannot recreate detail missing from the source audio; evaluate the exported file for the use you have in mind.
WAV output is uncompressed 16-bit PCM. The MP3 bitrate control is disabled when WAV is selected because it does not apply to this format. Both outputs use 48 kHz stereo. WAV is usually larger and can be useful when another application expects PCM audio. It also cannot reverse earlier lossy compression.
The tool exports the first audio track. If a video contains several languages or alternative soundtracks, there is no track selector here. The exported audio can include speech, background music and other sounds mixed together in that track; this is extraction, not voice isolation or noise removal.
Understand long-video and export limits
A source can be up to 30 minutes long, but a single export can contain at most 5 minutes. Leave Duration blank only when the remaining section fits within that five-minute limit.
For example, starting at 120 seconds in a three-minute video leaves one minute, so a blank duration can export the remainder. Starting at 120 seconds in a twelve-minute video leaves ten minutes, so you need to enter a duration of 300 seconds or less. Do not expect a blank field to automatically choose the first five minutes of a longer remainder.
Video frames are limited to 16 megapixels and 8192 pixels per side. Audio output is limited to 80 MiB. If an export exceeds that size, shorten the selection or use a lower MP3 bitrate. The tool is designed for a selected clip, not an unrestricted conversion of a long recording.
Troubleshoot the result
“No audio track” means the server could not find an audio track to export. Confirm that the original recording contains sound and choose a different source if needed.
A playback problem in the local source preview can come from browser codec support. Try extraction if the file meets the supported container and size requirements, then use the extracted-audio player to inspect the result.
If the output contains the wrong language or soundtrack, the source’s first audio track may not be the one you wanted. This page cannot choose another track. If the output contains music underneath speech, both are probably mixed into that track and remain together.
If the beginning or ending sounds wrong, check Start time and Duration, then make another selection. If processing fails or the server is busy, try a shorter clip. The result must contain the complete selected interval within the converter’s checks; partial output is not offered as a finished download.
Download and keep the file
Clicking Extract audio uploads the video to the server. Choosing a source and previewing it alone does not upload it. Cancel export stops this page from waiting, but an already uploaded job may finish on the server. Save the temporary result promptly.
If you need a smaller video while keeping its soundtrack, use Video Compressor instead: Video Compressor
If you want a moving image for a page or message, Video to GIF makes a short animation without sound: Video to GIF