MP4 to MP3 converter that keeps your MP4 on your device
Drop an MP4 from your phone, camera, screen recorder or editor, and Clipwipe saves its soundtrack as an MP3 right here in your browser. The MP4 is never uploaded, so a long recording doesn’t have to travel to a server first. Pick 128, 192 or 320 kbps, listen to the MP3, and download it, free and with no signup. MP4 files on your device only: it doesn’t take YouTube or other web links.
What happens to your MP4
An MP4 is a container: one file that holds a video stream (H.264, H.265 or AV1) and, usually, an AAC soundtrack. The converter leaves the picture alone, so it doesn’t matter whether the MP4 is 720p or 4K or which video codec it uses. It decodes the soundtrack and encodes a new MP3 with LAME, the open-source MP3 encoder, running inside this browser tab. Surround sound is mixed down to stereo, because that is what an MP3 holds.
How to convert MP4 to MP3
- Drop your MP4 on the tool above, or press Choose a video and pick it. On a phone it can come from your files or your gallery. The MP4 is read where it is and not uploaded.
- Pick 128, 192 or 320 kbps. The table below shows what each one makes for a song, a tutorial and a meeting recording.
- Press Convert to MP3. The bar shows how far it has got. Keep the tab open until it finishes.
- Listen on the page, then press Download MP3. The MP3 is named after your MP4:
holiday.mp4becomesholiday.mp3.
On a phone
Tap Choose a video and pick the MP4 from Files or Photos (Files or Gallery on Android), then keep this tab open and on screen until the bar finishes. On Android use Chrome, because Firefox on Android can’t run the converter; on an iPhone use Safari 26 or later.
How big the MP3 will be
The MP3’s size depends only on its bitrate and how long the MP4 runs, not on how big the MP4 is. A 2 GB 4K clip and a 50 MB phone clip of the same length give MP3s of the same size.
| MP4 | Bitrate to pick | MP3 size |
|---|---|---|
| A 4-minute music video | 320 kbps | About 9.6 MB |
| A 15-minute tutorial or vlog | 192 kbps | About 21.6 MB |
| A 60-minute meeting or lecture recording | 128 kbps | About 57.6 MB |
The sizes are the bitrate multiplied by the length: 320 kbps is 40 KB a second, 192 kbps is 24 KB and 128 kbps is 16 KB. A bitrate above what the MP4’s own soundtrack has makes a bigger MP3, not a better-sounding one.
Which MP4 soundtracks convert
Most MP4s carry AAC sound, which current browsers decode. Less common soundtracks depend on your browser. Dolby AC-3 or E-AC-3, found in some TV and camcorder recordings, often can’t be decoded in a browser. When that happens the tool stops and names the soundtrack’s codec, instead of handing you a silent or broken MP3.
Two other things stop an MP4 from converting. Some screen recordings and exports are saved with no sound at all, and the tool says the video has no audio track. Copy-protected (DRM) MP4s, such as films bought from a store, can’t be read.
Large MP4 files
No check refuses a large MP4: your device’s free memory is the limit. An MP4 up to 20 minutes long is read into memory in one go, so a short but very large file, such as a 4K recording, needs at least its own size in free memory. A longer MP4 is read and converted piece by piece, so its length matters less. If a big file fails, close other tabs and try again, or use a laptop rather than a phone.
Not an MP4?
The same converter takes MOV, WebM and MKV files too. Video to MP3 covers those formats, and its table of seven online converters shows what each one says about file size limits and how long it keeps uploaded files.
MP4 to MP3: upload converter or on-device?
An upload converter copies your MP4 to its server, converts it there and keeps the files for a while. Clipwipe converts the MP4 in this tab, so there is nothing to upload and nothing kept, and no set size cap: your device’s memory is the limit. Neither FreeConvert nor Zamzar needs an account for free use, and FreeConvert’s free plan also caps each file at 5 conversion minutes.
| Uploads your MP4? | Free size limit | How long files are kept | |
|---|---|---|---|
| Clipwipe | No | No set size cap; device memory is the limit | Nothing to keep |
| FreeConvert | Yes | 1 GB | Deleted after 8 hours |
| Zamzar | Yes | 50 MB | MP3 up to 24 hours; MP4 deleted once converted |
What Clipwipe handles
MP4 in: one MP4 at a time, from a phone, camera, screen recorder or editor, as long as your browser can decode its soundtrack. No set size limit.
MP3 out: 128, 192 or 320 kbps, stereo or mono, named after your MP4.
Not supported: web links, copy-protected (DRM) MP4s, and saving the AAC soundtrack as it is (the result is always a new MP3).
Browsers: Chrome and Edge 94+, Firefox 130+ on desktop, Safari 26+ (on older Safari sound may fail and it is not supported), Chrome on Android; Firefox on Android is not supported.
Responsible use
Convert only MP4s you made or have permission to use. An MP3 taken from a film, a music video or someone else’s talk carries the same rights as the video it came from.
Frequently asked questions
Does converting MP4 to MP3 lose quality?
A little. The MP4’s soundtrack is usually AAC, which is already compressed, and turning it into an MP3 compresses it a second time. 192 kbps keeps the loss small for most videos, and 320 kbps keeps the most. No setting can bring back detail the MP4’s soundtrack never had.
What is the difference between MP4 and MP3?
MP4 is a container that holds video, sound and sometimes subtitles in one file. MP3 is a sound-only format that plays almost anywhere, from phones and car stereos to podcast and audio editors. Converting MP4 to MP3 keeps the sound and drops the picture.
Why won’t my MP4 convert to MP3?
There are three usual reasons. The MP4 has no audio track, as with some screen recordings. Its soundtrack uses a codec your browser can’t decode, such as Dolby AC-3, and the tool names the codec. Or the file is copy-protected or damaged and can’t be read. A very large file can also run out of memory on a phone.
Is there a file size limit for MP4 to MP3?
No set limit. An MP4 up to 20 minutes long is held in memory whole while its sound is decoded, so a short 4K file needs plenty of free memory. Longer MP4s are read piece by piece.
Can I turn several MP4 clips into one MP3?
Yes, in two steps. Join the clips into one video with Merge videos online, then convert that video here. To get a separate MP3 for each clip instead, convert them one after another.
Does my MP4 get uploaded when I convert it?
No. Upload converters send the whole MP4 to their server to pull out the sound. Here the MP4 is read from your device and converted in this tab, and neither the MP4 nor the MP3 is sent anywhere.
Is MP4 to MP3 free, with no signup?
Yes. There is no account, sign-in or payment, no daily count of conversions, and nothing is added to the MP3. The only limit on an MP4’s size or length is your device’s memory.
Can I convert MP4 to MP3 on iPhone or Android?
It is built to: use Safari 26 or later on an iPhone, or Chrome on Android. Firefox on Android is not supported, because it lacks the WebCodecs feature the converter needs. We have not yet tested this converter on a phone, and a long MP4 needs more memory, so an older phone may fail on a file a laptop handles.
What bitrate should I pick?
128 kbps for speech such as meetings, lectures and voice notes. 192 kbps for most videos. 320 kbps for music, as long as the MP4’s own soundtrack is good enough to gain from it.
More free tools that run on your device
- Compress video: Shrink a video file by quality and resolution, without uploading it.
- Video to GIF: Turn up to 30 seconds of a video into a GIF, with trim and crop, without uploading it.
- Merge videos online: Join several clips into one continuous video, with transitions, without uploading them.
- Video to MP3: Save a video’s soundtrack as an MP3, without uploading the file.
- Gemini watermark remover: Erase the Gemini sparkle from AI images and video, with exact-pixel recovery on images.