Extract audio from any video instantly in your browser - no upload needed
Convert MP4 to MP3 directly in your browser, with output to MP3, AAC, WAV, FLAC or OGG and your choice of audio quality. Your files never leave your device, so nothing is uploaded and your content stays completely private. Working with a MOV, MKV or WebM instead? Use the video to MP3 converter.
or click to select a file
Works with MP4, MOV, MKV, WebM and more
🔒 Your files never leave your device - 100% private & secure
Drop your MP4 onto the page or click Select Video. Other containers are accepted too, though MOV, MKV and WebM files are better served by the video to MP3 converter.
Pick an output format - MP3, AAC, WAV, FLAC or OGG. Then select audio quality: Match Source attempts to copy the original audio without re-encoding when the output format is compatible with the source codec, or choose 320, 192 or 128 kbps for a specific bitrate.
Click Extract Audio. Processing runs entirely in your browser with no upload. When it finishes, download your audio file.
MP3 is the most widely compatible audio format and works on virtually every device and player - ideal for music, podcasts and general sharing. AAC offers better quality than MP3 at the same bitrate and is the default format on Apple devices. WAV is uncompressed and lossless, making it the best choice for professional editing where quality cannot be compromised, though files are much larger. FLAC provides lossless compression - the same quality as WAV in roughly half the file size - and is popular for archiving music collections. OGG (Vorbis) is an open-source format with quality comparable to AAC, commonly used in games and web applications.
MP4 is the container almost every phone, camera and screen recorder writes to, so it is usually the file people have when all they actually want is the sound. Podcasters turn recorded interviews, livestreams and Zoom calls - all of which export as MP4 - into MP3 episodes ready for upload to Spotify, Apple Podcasts or a private RSS feed. Musicians and DJs convert MP4 concert recordings and music videos so they can listen on the move, sample sections in a DAW, or build a playlist that works in a car stereo that does not play video. Voice actors and content creators lift voiceover takes out of MP4 screen recordings and re-use the clean audio in a different edit without re-recording. Students and researchers convert MP4 lectures, webinars and conference talks so they can listen at the gym, on a commute, or transcribe later with a speech-to-text tool. Anyone who values storage and battery life will also notice that the resulting MP3 is typically 5 to 20 times smaller than the MP4 it came from, so a two-hour talk that fills 1.5 GB as MP4 fits in under 100 MB as audio.
MP4 is what this page is built around, and it handles every flavour of it: a clip downloaded from a chat app, a phone recording (.mp4 or .m4v), a GoPro export, or a screen capture. The converter will also read MOV, MKV, WebM, OGV, MPEG, MPG and MPEG-TS, plus the audio-only formats MP3, AAC, M4A, WAV, FLAC and OGG if you simply want to re-encode into a different format - though for those containers the video to MP3 converter is the page to use. On the output side you can choose MP3, AAC, WAV, FLAC or OGG, so this page covers MP4 to MP3, MP4 to WAV, MP4 to AAC and every other MP4 audio pairing in one place.
Most online converters force a re-encode, which is slow and quietly degrades audio quality every time you process the file. VidShift takes a smarter approach. The default "Match source" mode performs a stream copy whenever the source audio codec is compatible with your chosen output container - the original encoded audio is repackaged byte-for-byte with no re-encoding, no quality loss, and processing that finishes in seconds even on long videos. If you do need a specific bitrate, the 320, 192 and 128 kbps presets give you predictable file sizes for music, podcasts or voice notes. WAV and FLAC outputs always preserve the full dynamic range, making them ideal when the audio is going into Audition, Logic, Audacity or Reaper for further editing.
If you need to extract audio from a folder of videos rather than a single clip, switch over to the dedicated batch video converter. It accepts the same set of input formats, queues every file with a single chosen output, and processes them sequentially in your browser with no upload step. This is the fastest way to convert a whole season of recorded meetings, a lecture series, or a music video collection into MP3 or AAC in one go - and because everything runs locally there are no per-file caps, no daily limits and no watermarks.
Almost every other "free MP4 to MP3 converter online" works the same way: you upload your video to a remote server, it processes the file, and you download the result. That model is convenient but it means a copy of your media now sits on someone else's hardware, often retained for hours or days, sometimes used to train models or surface ads, and almost always exposed to the operator's staff and any future security incident. VidShift is different. Conversion runs entirely inside your browser using WebAssembly and the WebCodecs API, so the bytes of your video never leave your device. There is no media upload, no server-side copy of your file, and no account to create or delete. That makes this tool safe for confidential interviews, internal meeting recordings, unreleased music, medical or legal recordings, and anything else you would not happily hand to a stranger. As a side effect, the conversion is also faster for large files because nothing has to upload, and the page even works offline once it has loaded once.
Converting MP4 to MP3 turns a video file into a lightweight audio track you can play anywhere. People reach for a free online MP4 to MP3 converter to save music videos as listen-only tracks for a phone or car stereo, to publish recorded interviews and Zoom calls as podcast episodes, and to pull lectures, webinars and sermons off video so they can listen on a commute. Content creators lift clean voiceover or background music out of a clip to reuse in a new edit, while many users simply want a smaller file - an MP3 of a two-hour talk is often 10 to 20 times smaller than the source MP4, which saves storage and mobile data.
Quality comes down to the bitrate you pick. For spoken word such as podcasts, audiobooks and meeting notes, 128 kbps keeps files small with no noticeable loss. For music and general listening, 192 kbps is a comfortable standard, and 320 kbps is the highest MP3 bitrate for the most detail. Remember that MP3 is a lossy format, so re-encoding always discards some data - choosing "Match source" copies the existing audio stream without re-encoding whenever it is compatible, giving you the original quality instantly. If you plan to edit the audio afterwards, export to WAV or FLAC instead to keep every detail intact.
Any MP4 works here, including the .m4v variant, and the converter will also read MOV, MKV, WebM, MPEG, MPEG-TS and OGV plus audio files like AAC, M4A, WAV, FLAC and OGG. On the output side you can save audio as MP3, AAC, WAV, FLAC or OGG, so this page handles MP4 to MP3, MP4 to WAV and MP4 to AAC without switching tools. For a MOV, MKV or WebM source, the video to MP3 converter is the better starting point.
Most "free MP4 to MP3 converter online" services upload your video to a remote server, convert it there, and let you download the result - which means a copy of your file sits on hardware you do not control. VidShift works entirely in your browser using WebAssembly and WebCodecs, so the bytes of your video never leave your device. There is no upload, no server-side copy, no account and no waiting in a queue. That makes it safe for confidential recordings and sensitive interviews, and it is faster for large files because nothing has to travel over the network. Once the page has loaded, it even keeps working offline.
Yes, it is completely free with no hidden costs, no account and no daily limits. There is no trial, no watermark on your audio, and no premium tier to unlock features. Because conversion runs in your browser rather than on paid servers, you can convert as many MP4 files to MP3 as you like at no charge.
No. Unlike most online converters, VidShift never uploads your video. The MP4 to MP3 conversion happens entirely on your device using WebAssembly and WebCodecs, so your file stays private and the process is faster because nothing has to travel to a server and back.
For podcasts, audiobooks and spoken word, 128 kbps keeps files small with no audible loss. For music and general listening, 192 kbps is a good standard, and 320 kbps gives the highest MP3 quality. If you want to avoid any re-encoding, choose "Match source" to copy the original audio when the format is compatible.
Drop or select your video file on this page. Choose your output format and quality, then click Extract Audio. The conversion runs entirely in your browser - no upload, no signup, no cost. When it finishes, click Download to save your audio file.
It will work, but the video to MP3 converter is the page built for it. That tool covers every common container including MOV (with Apple ProRes), MKV, WebM, OGV and MPEG-TS, and answers the questions specific to those formats.
Yes. After the audio is extracted, the "Ready to do more?" links pass the original video straight to another tool - trim it, compress it, or turn it into a GIF - with no download-and-re-upload step in between. The file is handed over through your browser's own local storage and never touches a server, so chaining tools together stays exactly as private as the extraction itself.
It depends on your settings. If you select "Match source" and the source audio codec matches your chosen output format, the audio is copied directly with no quality loss. Otherwise, the audio is re-encoded at your chosen bitrate. Higher bitrates like 320 kbps preserve more detail.
This tool runs entirely in your web browser - no software installation needed. Open this page in Chrome or Edge, drop your MP4, and click Extract Audio. The processing happens on your device using WebAssembly and WebCodecs technology.
MP3 is the most widely compatible compressed audio format - great for music and podcasts. AAC offers better quality at the same bitrate and is used by Apple devices. WAV is uncompressed lossless audio - perfect quality but much larger files. FLAC is compressed but lossless, offering a good balance of quality and size.
Speed depends on your device and file size. If the source audio matches your chosen format and you select "Match source" quality, the extraction is near-instant since no re-encoding is needed. Full transcodes typically process faster than real-time on modern devices.
There is no hard limit. The practical limit depends on your device's available memory. Since only the audio track is extracted, even large video files produce relatively small audio outputs. Most modern devices handle files up to several gigabytes without issues.
Yes. Your files never leave your device. VidShift has no backend servers that receive or store your media. All processing runs locally in your browser using WebAssembly, ensuring complete privacy. The tool even works offline after your first visit.
Absolutely. Use the format selector to choose WAV (lossless, large file), FLAC (lossless, compressed), AAC (smaller than MP3, great quality), or OGG. MP3 is selected by default as it is the most universally compatible.
AAC generally produces better audio quality than MP3 at the same file size, and is the default format on iPhones and Apple devices. MP3 is more universally supported across all devices and players. For most uses, either is fine - choose MP3 for maximum compatibility or AAC for slightly better quality.
Yes. This page is optimised for converting one file at a time, but VidShift also has a dedicated batch converter that accepts a queue of MP4s and converts every one of them to a single chosen output format. It is ideal for podcast back catalogues, recorded meetings or music video collections, and like this page it runs entirely in your browser with no uploads.
VidShift does not download videos from YouTube or any other streaming platform - it only works with files already saved on your device. If you have legitimate access to the source video (your own upload, a permitted download, a screen recording, or a clip licensed for reuse), drop the file here and the audio will be extracted locally in your browser.
Yes. The tool runs in any modern mobile or desktop browser that supports WebAssembly and WebCodecs, which includes recent versions of Chrome, Edge, Safari and Firefox on iOS, Android, macOS, Windows, Linux and ChromeOS. On phones, processing speed depends on the device, but extracting audio is far less demanding than transcoding video so even older handsets handle most files comfortably.