MP4 to MP3 Converter: Extract Audio From Any Video
Turn any video into an MP3 in your browser. Pick 128 to 320 kbps, convert and download. Free, private, no watermark.
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WebM to MP3 Converter
Convert a WebM file to an MP3 audio file. Free, and nothing is uploaded.
No registration required
Secure & private
Works on any device
Drop a video here
or click to browse — MP4, MOV, M4A, WebM and other common formats
Your MP3 is ready
Best for videos up to about an hour. Very long or very large files may run out of memory.
100% Private
Files are converted locally in your browser — nothing is uploaded.
Fast
No waiting on uploads. Conversion runs right on your device.
Free & Unlimited
No account, no watermark, no file limits.
How to convert MP4 to MP3
Three quick steps. Nothing to install and nothing leaves your device.
1
Add your video
Drag a video onto the box above or click it to browse your files. MP4, MOV, M4A and WebM work in most browsers.
2
Choose the quality
Pick a bitrate from 128 to 320 kbps. 192 kbps is a good balance of size and sound, and 320 kbps is the highest quality.
3
Convert & download
Press Convert to MP3, preview the audio in the player, then download your file. It keeps the name of your video with a .mp3 ending.
Convert WebM to MP3
Drop your .webm file onto the box, choose the quality and press Convert to MP3.
- Video or audio: the upload box accepts both.
- Browser support: Chrome opens WebM files most reliably. If a file fails in another browser, try Chrome.
- Quality: choose 128 to 320 kbps. The MP3 cannot be better than the sound in the WebM file.
More MP4 to MP3 options
Why convert MP4 to MP3?
Sometimes you only need the sound. A recorded lecture, a podcast episode saved as video, an interview, a meeting recording or a song clip is easier to carry and play as an audio file. MP3 plays on almost every phone, car stereo, computer and music app, and it is much smaller than the video it came from.
Many online converters upload your video to a server first. This one does not. The audio is pulled out and encoded on your own device, which suits private recordings and saves time on a slow connection.
How this tool turns a video into an MP3
- It reads the file in your browser. The video is loaded into memory on your device and nothing is sent anywhere.
- It decodes the audio track. Your browser extracts the sound from the video, so what it can open depends on the browser. Chrome handles the widest range of formats.
- It encodes an MP3 at the bitrate you choose. You can pick 128, 192, 256 or 320 kbps. Stereo audio stays stereo, and mono stays mono.
- It lets you listen before you save. The result appears in a player, along with the file size, length and bitrate, so you can check it before you download.
Which MP3 quality should you pick?
A higher bitrate means better sound and a bigger file. As a rough guide, one minute of audio takes about 1 MB at 128 kbps, 1.4 MB at 192 kbps, 1.9 MB at 256 kbps and 2.4 MB at 320 kbps.
- 128 kbps: fine for speech, lectures and voice notes, and gives the smallest file.
- 192 kbps: a good all-round choice for music and speech, and the default here.
- 256 to 320 kbps: best for music you plan to keep. For 320 kbps with the setting already chosen, use MP4 to MP3 320kbps.
A higher bitrate cannot add detail that the video's own sound does not have. If the original audio is low quality, choosing 320 kbps only makes the file bigger.
Limits to know about
- One file at a time. Use Convert Another to start the next video.
- Long videos need memory. The whole file is decoded in memory, so videos longer than about an hour may fail on some devices. A computer usually copes better than a phone.
- The video needs a sound track. A silent screen recording has no audio to extract.
- Some formats may not open. If your browser cannot decode the video, try Chrome or convert it to a common format first.
Tips for better results
- Close heavy tabs first. Freeing up memory helps with large files.
- Test a short file first. If a long video fails, try a shorter one to check that your browser can open the format.
- Need a MOV file in a more common format? Use MOV to MP4 first, then extract the audio here.
- Need a lossless copy? MP3 to WAV changes the file type, but it cannot bring back detail that MP3 compression has already removed.
- Want a short clip with pictures? MP4 to GIF turns part of a video into an animated image.
Want the best quality?
Convert at MP4 to MP3 320kbps, with the highest quality selected for you.
Learn about Audio
Helpful guides on extracting audio and choosing the right MP3 quality.
Frequently asked questions
Quick answers about converting MP4 to MP3 with ConvertKit Lite.
Is it safe to convert my video here?
Yes. Conversion runs in your browser, so your file is not uploaded to a server.
Which file formats work?
MP4, MOV, M4A and WebM work in most browsers. Support depends on what your browser can decode, and Chrome handles the widest range.
Which MP3 quality should I choose?
192 kbps sounds good for most music and speech. Choose 320 kbps for the best quality, or 128 kbps for the smallest file.
Why did the conversion fail?
The video may have no audio track, use a format your browser can't decode, or be too large for your device's memory. Try a smaller file or Chrome.
Is there a file size limit?
There is no limit on our side. The whole file is decoded in memory, so videos longer than about an hour may fail on some devices.
Does it work on a phone?
Yes, in any modern browser on Android, iPhone, Windows and Mac. Phones have less memory, so long videos are more likely to fail there. A computer is the safer choice for big files.
Can I convert audio files such as M4A or WebM too?
The upload box accepts audio files as well as video, and M4A and WebM are listed. Whether a file opens depends on the formats your browser can decode. If one fails, try Chrome.
Is the MP3 the same quality as the video's audio?
Not exactly. MP3 is a compressed format, so some detail is lost, especially at low bitrates. Choose 256 or 320 kbps to stay as close as possible. The result can never be better than the audio already in the video.
Can I convert several videos at once?
Not at once. Convert one file, download it, then press Convert Another to add the next video.
What will my MP3 file be called?
It keeps the name of your video and ends in .mp3. For example, lecture.mp4 becomes lecture.mp3.
Is there a watermark or an account?
No watermark, no sign-up and no limit on how many files you convert.
Can I convert a WebM file to MP3?
Yes. Add the .webm file, choose a quality and convert. Whether it opens depends on your browser, and Chrome works best.
Can I convert a WebM recording that has only audio?
Yes. The upload box accepts audio files as well as video, so an audio-only WebM can be converted the same way.