Extract Audio from Video Online
Extract audio from any video as MP3, WAV, OGG, or FLAC. Free, in your browser.
.mp4, .mov, .avi, .mkv, .webm · up to 100 MB
What you can do
Extract audio from video without servers
100% private
Audio is extracted in your browser. Your video never gets uploaded to any server.
4 output formats
MP3, WAV, OGG, and FLAC. Choose the right format for each use case.
5 input formats
Compatible with MP4, MOV, AVI, MKV, and WebM without prior conversion.
Instant extraction
No queues, no waiting. Audio is extracted in seconds directly in your browser.
How it works
Three steps, no hassle
Upload your video file
Drag or select your MP4, MOV, AVI, MKV, or WebM file. Up to 500 MB, no signup.
Choose your audio format
Pick MP3 for universal compatibility, WAV for lossless quality, OGG for web use, or FLAC for audiophile archival.
Download your audio
Audio is extracted directly in your browser. Download the resulting file with one click.
FAQ
Got questions?
It depends on your chosen output format. If the video contains AAC audio (common in MP4) and you extract to MP3, there is transcoding (decoding from one lossy codec and re-encoding to another), which involves a small quality loss. If you choose WAV or FLAC as output, the audio is decoded from the video's codec and stored without additional compression (WAV) or with lossless compression (FLAC), preserving all quality available in the source. For casual use like podcasts or background music, MP3 at 192 kbps is fully transparent to the human ear. For professional production or archival, WAV or FLAC are the correct choices.
MP3 is the universal format: compatible with all devices, streaming platforms, and players. Ideal for podcasts, music listening, and social media content. WAV is the production format: uncompressed, maximum quality, preferred in recording studios, professional video editing (Premiere Pro, Final Cut) and mastering. OGG Vorbis is the open-source option: excellent quality at low bitrates, natively used in game engines (Godot, Unity) and web browsers. FLAC is for audiophile archiving: lossless compression, reduces WAV size by 40-60% without losing a single audio bit. Perfect for high-resolution music collections.
Videos with multiple audio tracks (films with multi-language audio, DAW recordings with separate tracks) allow choosing which track to extract. The tool extracts the primary audio track by default (track 0 in FFmpeg's nomenclature). If you need to extract secondary tracks (audio descriptions, director's commentary, alternate languages), more advanced tools like FFmpeg command-line allow specifying the track with the -map 0:a:1 flag for the second audio track, for example.
The tool accepts video files up to 500 MB. This limit is determined by available browser memory, not server restrictions (since processing happens locally). High-resolution videos like 4K at 60fps can have large files; if your video exceeds the limit, you can split it first with tools like HandBrake or FFmpeg. For typical podcasts and screen recordings (1080p, 1-hour duration), files rarely exceed 500 MB.
The tool supports the most common video formats: MP4 (container with H.264 or H.265 codec), MOV (Apple's native format, common on iPhone and Final Cut Pro), AVI (legacy Windows format, still common in camera recordings), MKV (Matroska, popular for high-definition content due to its multi-track support) and WebM (Google's web format, with Opus or Vorbis audio). The audio codec inside the container can be AAC, MP3, AC3 (Dolby), DTS, Opus, or uncompressed PCM, and extraction is compatible in all cases.
The most common use cases are: extracting the soundtrack from a music video or concert recording, getting audio from a screen recording (video tutorial) to publish as a podcast, extracting dialogue from a filmed interview for transcription, recovering music from a downloaded video when you only want the audio, extracting sound effects from videos for use in editing projects, and getting audio from home videos to save as a memory in a smaller format.
Extract audio from video: codecs, FFmpeg, and formats explained
Extracting audio from a video file is technically different from conversion (transcoding). When you extract audio, you are demuxing the video container: separating the audio track from the video track without necessarily re-encoding either one. In FFmpeg, the equivalent command is ffmpeg -i input.mp4 -vn -acodec copy output.aac, where the -vn flag (video none) removes the video track and -acodec copy copies the audio stream without re-encoding it. This is different from conversion, where audio is decoded and re-encoded into a new format. Direct copy (-acodec copy) is the fastest method and preserves 100% of the original quality, but only works if the output format is compatible with the video's source audio codec. For example, extracting AAC audio from an MP4 to an .aac file is a direct, lossless copy. Converting that same AAC audio to MP3, however, requires decoding and re-encoding, with the quality loss inherent in re-compressing already-compressed audio (generational loss). For podcasts and screen recordings, this distinction matters: if the video was recorded with AAC audio and your final destination is MP3, consider whether the generational loss is acceptable for your use case. In most cases with reasonable bitrates (192+ kbps for MP3), the difference is imperceptible.
The most common video containers encapsulate different audio codecs. The MP4 format (MPEG-4 Part 14, standardized in 2003) can contain AAC audio (Advanced Audio Coding, the official successor to MP3 and the default codec on iOS/macOS), AC-3 (Dolby Digital, standard in DVD and Blu-ray), DTS, or even MP3. Apple's MOV container, used by iPhones and Canon/Nikon cameras with updated firmware, also uses AAC as its default codec. AVI (Audio Video Interleave, developed by Microsoft in 1992) typically contains MP3 or uncompressed PCM. MKV (Matroska, an open-source project started in 2002 by Steve Lhomme) is the most versatile container: it supports virtually any audio codec including DTS-HD Master Audio, Dolby TrueHD (used in Blu-ray), and FLAC. WebM (developed by Google in 2010 as a patent-free format) uses Opus or Vorbis as audio codecs. Understanding what audio codec your video contains is key to choosing the best extraction strategy: if the audio is already in the format you need, direct copy is always preferable. If you need to change the format, re-encoding is inevitable but can be done with minimal loss by choosing an appropriate bitrate.
Audio extraction has concrete professional use cases. For content creators, the most common workflow is to record a video for YouTube and extract the audio to publish simultaneously on Spotify, Apple Podcasts, or other audio platforms: a single recording process generates two pieces of content. Screen recordings (screencasts) are especially common in technical tutorials where the narrated audio is the primary content and the video serves only as visual support. For musicians, extracting audio from live performance videos or music videos allows obtaining audio for mixing, mastering, or transcribing. In the educational realm, many video courses are better consumed as audio during commutes, making audio extraction a personal productivity tool. Convertir.ai processes extraction entirely in your browser using the Web Audio API and WebCodecs, available in Chrome 94+ and Edge 94+ (with partial support in Firefox). This guarantees total privacy: no frame of your video, no sample of your audio, ever reaches our servers at any point during processing.