Pull the audio out of your MP4 file and save it as MP3, right in your browser.
Drag and drop the file, or click to browse. Files up to 500 MB are supported, and nothing is installed.
MP3 is already selected. Switch between MP3 and WAV if you change your mind.
We convert on our servers, usually in under a minute. Create a free account to download the MP3, or keep editing the file in REQO.
MP4 is the closest thing video has to a universal format: an MPEG-4 container that almost always holds H.264 video and AAC audio, which every browser, phone, TV and social platform can play without a plugin.
The practical problem: MP4 is already the safest format, so the usual reason to convert away from it is a specific destination that wants something else.
MP3 solves that. Plays on every phone, car stereo, browser and podcast host in existence. Small enough to attach to an email or send in a chat. Accepted by every transcription and podcast service.
This pulls the audio track straight out of the video, so a recorded call, lecture, interview or podcast video becomes something you can listen to, send, or feed to a transcription service. The MP3 is a fraction of the size of the video, because everything but the sound has been dropped.
| MP4 | MP3 | |
|---|---|---|
| Container | MPEG-4 Part 14 | MPEG audio layer III |
| Typical codecs | H.264 video, AAC audio | MP3 (lossy) |
| Best for | Sharing anywhere, uploads, web embeds | Podcasts, voice notes, music you need to send |
| Plays on | Every phone, browser, TV and editor | Every device made in the last 25 years |
| File size | Small for the quality | Roughly a tenth of uncompressed audio |
Yes. Convert and preview the result for free, then create a free account to download it. There is no per-file charge and no watermark on the MP3 itself beyond the free-plan badge.
No. The conversion runs on our servers and the whole flow happens in your browser, so it works the same on Windows, macOS, Linux, iPhone and Android.
The audio is decoded from the video and written as MP3. MP3 is a lossy format, so there is a small re-encode, inaudible for speech at the default quality. The picture is discarded entirely, which is why the file gets so much smaller.
Up to 500 MB per file. For anything bigger, trim or compress it first, both are free tools here.
Your upload is processed and then held only as long as your project needs it. Nothing is published, indexed or shared unless you create a share link yourself.
Yes: the AAC track inside the MP4 is decoded and written as MP3. Choose WAV instead if you plan to keep editing the audio and want to avoid stacking lossy encodes.
Yes. REQO’s transcribe tool turns the same file into text or SRT subtitles, and it is free with an account.
To WebM
Turn your MP4 file into a WebM that plays where you need it, right in your browser.
OpenTo MOV
Turn your MP4 file into a MOV that plays where you need it, right in your browser.
OpenTo GIF
Turn your MP4 file into a GIF that plays where you need it, right in your browser.
OpenTo MP3
Pull the audio out of any video and save it as MP3, right in your browser.
OpenTo MP3
Turn any audio file into an MP3 that plays where you need it, right in your browser.
OpenTo MP3
Pull the audio out of your MOV file and save it as MP3, right in your browser.
OpenFree, in your browser, and the file stays open in a full video editor afterwards.