Turn an MP4 Video Into an MP3
Upload an MP4 file and ScreenApp keeps the audio track as an MP3. The picture is dropped, so a talk, a lesson, a podcast episode filmed on camera or a song from a music video becomes a much smaller file you can play in any audio app.
The video is also transcribed. That means you can find the part you want by reading or searching the transcript, and check you have the right file before you download the audio.
What you get:
- The MP4’s audio as an MP3, downloaded with the Download Audio button on the file
- Other video uploads too: MP4, M4V, MOV, AVI, WEBM, MKV, FLV, TS, MTS, M2TS, 3GP, 3GPP, 3G2, WMV, ASF, VOB, OGV, RM, RMVB, MPG, MPEG, M2V, F4V, MXF
- Files up to 2 GB in the free online tool on this page, and no set file size limit in the app
- A transcript in 100+ languages, exportable as PDF, DOCX, TXT, SRT and VTT
- AI chat with any recording, so you can ask what the video covers without watching it
How to Convert MP4 to MP3
- Upload the MP4: drop the video on the tool above, or pick it from your computer or phone. Sign in with a free account to save it.
- Let it process: ScreenApp stores the video and transcribes the audio. Both are in your library when processing finishes.
- Download the MP3: open the file and press Download Audio. Downloads are available on paid plans, starting at $19 a month billed annually.
The MP3 can only be as good as the sound in the video. A phone recording in a noisy room stays noisy, and a clip with low-quality audio does not improve when it becomes an MP3. The transcript follows the same rule, so see how we measure accuracy for what affects it.
If the video is on YouTube or another site rather than saved on your device, paste the link in the tool’s link tab instead of downloading the video first. Extract Audio from Video Link explains how link imports work.
MP4 to MP3 Converter vs Other Tools
| Feature | ScreenApp | FreeConvert | HappyScribe | CloudConvert |
|---|---|---|---|---|
| Max file size, free | 2 GB (free online tool) | 1 GB | Not stated | 1 GB |
| Account needed | Yes, free account | Not stated | No, no sign-up | Not stated on the tool page |
| MP3 download on the free plan | No, Paid plans only | Yes | Yes | Yes |
| Trim before converting | After upload, in the library | Yes, trim start and end times | Not stated | Not stated |
| Transcript of the video | Yes | Not stated | Separate tool | Not stated |
Sources, checked 2026-09-24: ScreenApp pricing, freeconvert.com/mp4-to-mp3, cloudconvert.com/pricing, happyscribe.com/tools/convert-mp4-to-mp3, screenapp.io/help/free-account-download-limits
- vs FreeConvert: FreeConvert’s MP4 to MP3 tool takes free files up to 1 GB, lets you set trim start and end times, and deletes uploads after 8 hours. It is the better fit when you want a trimmed MP3 and nothing else.
- vs HappyScribe: HappyScribe’s converter needs no sign-up and points you to its separate audio to text tool for a transcript. ScreenApp does both on the same upload, and the MP3 download is on paid plans.
- vs CloudConvert: CloudConvert’s free tier allows 10 conversions a day on files up to 1 GB. ScreenApp’s free plan is 3 uploads with no daily reset, each kept in your library with AI chat.
Who Converts MP4 to MP3
Students save recorded lectures, webinars and course videos as MP3s to listen to on a commute, then search the transcript when revising a specific topic.
Podcasters who film their episodes pull the audio out of the MP4 for their podcast feed, and use the transcript for show notes.
Musicians and DJs keep the sound from a performance video or a rehearsal recording to listen back without the video.
Video editors separate the audio from an MP4 to clean it, reuse it as a voiceover, or add it to a different clip.
Language learners turn videos in the language they are learning into MP3s to replay, and read along with the transcript.
