conversions4 min read
How to Extract Audio From a Video File
Pull the audio track out of an MP4, MOV, AVI, MKV, or WebM file and save it as MP3 — free, private, entirely in your browser. No upload, no watermark.
Convert MP4 to MP3
Extract the audio from any video and save it as MP3 — a free video to MP3 converter and audio extractor, instant and private. Nothing is uploaded.
Drop a video here, or click to browse
Extracts the audio track — supports MP4, MOV, AVI, MKV, and WebM
✓Free forever
✓Runs locally
✓No account
✓No watermark
Everything you need to convert MP4 to MP3 online
Clean audio extraction
Pulls just the audio track out of your MP4 and encodes it as a standard MP3 — no video re-encoding, so it's fast and keeps the original audio quality.
100% private — no upload
Conversion runs entirely in your browser using WebAssembly. Your video is never sent to a server, stored, or seen by anyone but you.
No account, no watermark
Free to use with no sign-up, no file limits, and no watermark on the output MP3.
Works with common video formats
Accepts MP4, MOV, AVI, MKV, and WebM — the formats phones, cameras, and screen recorders actually produce.
Works on any device
Fully responsive with touch-friendly controls — extract audio from your phone, tablet, or desktop without installing anything.
Safe for sensitive footage
Because nothing leaves your device, this is safe to use on personal recordings, interviews, or footage you can't upload to a third-party server.
Three steps to an MP3 from your video
- 1
Upload your video
Drag and drop an MP4 (or MOV, AVI, MKV, WebM) onto the page, or click to browse. Nothing is uploaded to a server — the file stays on your device.
- 2
Audio extracts automatically
The video's audio track is decoded and encoded to MP3 entirely in your browser. A progress bar shows the extraction as it runs.
- 3
Download your MP3
Preview the result right on the page, then click Download to save the MP3 to your device.
Built for anyone who needs just the audio
Whether you're publishing a video interview as a podcast, archiving a lecture recording, or pulling a voice memo out of a phone video — PixelTools extracts the audio in seconds with no upload required.
Podcasters and creators
Recorded a video interview or podcast episode? Extract just the audio to publish on Spotify, Apple Podcasts, or any audio-only feed.
Students and researchers
Turn lecture recordings or interview footage into MP3s you can listen to on the go, transcribe, or archive without the video bulk.
Musicians and voice memos
Pull the audio out of a phone-recorded rehearsal, voice memo video, or live performance clip to share or edit as a standalone track.
Reducing file size for sharing
An MP3 is a fraction of the size of the source video — extract the audio when only the sound matters, to email or message it more easily.
Frequently asked questions
Is the MP4 to MP3 converter free?
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Yes, completely free with no limits. Convert as many videos as you want. No subscription, no account, no watermark.
Does this tool upload my video to a server?
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No. Audio extraction and MP3 encoding both happen entirely in your browser using WebAssembly. Your video file never leaves your device.
What video formats are supported?
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This works as a general video to MP3 converter — MP4, MOV, AVI, MKV, and WebM are all supported. The output is always a standard MP3 file.
Is there a file size limit?
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Videos up to 2GB are supported. Very large files will take longer to process since everything runs on your device's CPU rather than a server.
Will the audio quality be reduced?
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The tool extracts the original audio track and encodes it as MP3 at a high quality setting (VBR ~190kbps), so quality loss is minimal compared to the source.
Can I convert a YouTube video to MP3 with this tool?
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This tool converts video files you already have on your device — it doesn't download from YouTube or other streaming sites. You'll need to have the MP4 file saved locally first.
Why does the first conversion take longer than the next one?
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The first time you use the tool in a session, your browser downloads the audio-conversion engine (a one-time download that's then cached). Subsequent conversions in the same session start immediately.
Can I use the extracted MP3 commercially?
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PixelTools does not claim any rights over files you process. The output MP3 is yours to use however you like, subject to any rights the original video's owner holds.
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