Free MP3 converter
Turn a video or audio file into an MP3 right here in your browser. Nothing is uploaded: the file stays on your phone or computer. No sign-up and no watermark.
Your file is converted on this device. It is never uploaded.
How to convert a file to MP3
- Tap "Choose a video or audio file" and pick the file, or drag it onto the box.
- Pick a quality. Voice is enough for meetings, lectures and voice notes. Pick High for music.
- Tap "Convert to MP3" and keep the page open until it finishes. The first time, the page loads the converter (about 30 MB).
- Tap "Download MP3". The file goes to your Downloads folder, or to Files on iPhone.
Which files work
| File type | Where it usually comes from |
|---|---|
| MP4 | Zoom and Teams recordings, phone videos, screen recordings |
| MOV | iPhone camera and Mac screen recordings |
| M4A | iPhone Voice Memos and Mac recordings |
| WAV | Voice recorders and studio software |
| WEBM | Browser recordings and Google Meet downloads |
| OGG, OPUS | WhatsApp and Telegram voice messages |
| AAC, FLAC, WMA | Music files and older recorders |
Which quality to pick
MP3 size depends on the quality, not on the original file. For one hour of sound:
| Quality | Best for | Size per hour |
|---|---|---|
| Voice (64 kbps, mono) | Meetings, lectures, voice notes | about 29 MB |
| Standard (128 kbps) | Podcasts, mixed audio | about 58 MB |
| High (192 kbps) | Music | about 86 MB |
Why this converter does not upload your file
Most online converters send your file to their server, convert it there, and send it back. That is slow for big videos, and your recording sits on someone else's computer.
This page downloads the converter to your browser once and does the work on your device. Your file is read from your disk, converted, and saved back. It never travels over the internet, so private meetings and interviews stay private.
Turn this recording into notes
Is it a meeting, a lecture or an interview? Noter AI writes the transcript with speaker names, then a summary and action items. Import the MP3 in the app on iPhone or Android, or upload it in the web app.
Questions
Is the MP3 converter free?
Yes. There is no sign-up, no watermark and no limit on how many files you convert.
Is my file uploaded?
No. The conversion runs inside your browser. The file never leaves your phone or computer.
How big can the file be?
Up to 2 GB. A computer handles big videos best. On a phone, files under about 500 MB work most reliably.
Can I paste a YouTube link?
No. This tool converts files you already have on your device. It does not download from YouTube or other websites.
Does it work on iPhone and Android?
Yes, in Safari on iPhone and iPad and in Chrome on Android. Keep the page open while it converts.
How do I get the audio out of a video?
Choose the video file. The converter keeps only the sound and saves it as an MP3. The picture is dropped.
Can I get a transcript of the MP3?
Yes, with Noter AI. Import the MP3 in the app on iPhone or Android, or upload it in the web app. You get the transcript with speaker names, a summary and action items.
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