How to Extract Audio from Video (Free & Offline)

Extract audio from MP4, MOV, MKV and any video — to MP3, WAV, AAC or FLAC. Do it free in FFmpeg, or in one click offline with FileHop — videos never leave your device. Mac & Windows.

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Why extracting audio is almost always free and lossless

Most video files (MP4, MOV, M4V) carry their audio as AAC inside the container. "Extracting the audio" usually just means muxing that AAC track out into its own file — no decoding, no re-encoding, no quality loss. A 2-hour video extracts in 5–10 seconds because nothing about the audio is being processed; the bytes are copied. This is called "stream copy" (-acodec copy in FFmpeg).

The only time extraction costs you quality is when you ALSO convert format — most commonly when you turn the source AAC into MP3 because some destination (an old car stereo, a transcription service, a podcast-host requirement) demands MP3. That step is a re-encode, and since the source AAC is already lossy, you stack two lossy passes ("second-generation lossy"). At 256–320 kbps it's still indistinguishable for most listeners, but it is not bit-perfect.

So the real question is rarely "which converter is fastest" — it's "which audio format should the output be?" That depends on what you're going to do with it: keep it (.m4a), play it everywhere (.mp3), edit it (.wav), or archive it (.flac). The next section is the 4-format cheat sheet; the section after is the literal FFmpeg one-liner; then the GUI desktop recipe for users who don't want a terminal.

MP3 vs WAV vs AAC vs FLAC — pick the right format

Four common audio formats, four different jobs. Pick by destination, not by habit.

Format	Lossy or lossless	Typical size for 1 hr of audio	Best for	Avoid when
MP3	Lossy (re-encode)	~57 MB at 128 kbps, ~86 MB at 192 kbps, ~144 MB at 320 kbps	Universal playback — every player, every browser, every podcast host, every car stereo, old hardware. The safe default when you don't know the destination.	Archival or editing — it's lossy and the artifacts compound on every re-export.
AAC (.m4a)	Lossy, but stream-copied from MP4 is bit-perfect	Same size as the original audio track (no re-encode)	When the source is MP4 / MOV and you just want the audio file at original quality, instantly, with no quality loss.	Only when the destination explicitly demands MP3.
WAV	Lossless (uncompressed PCM)	~600 MB per hour at 44.1 kHz 16-bit stereo	Editing in Audacity / Logic / Ableton, ADR, mastering — anything where you'll re-process the audio.	Sharing or storage — it's ~10x the size of MP3 for no perceptual gain.
FLAC	Lossless (compressed)	~300 MB per hour (about half of WAV)	Archival, classical / acoustic music, master copies of voice recordings.	Casual sharing — smaller players and most podcast hosts don't accept FLAC.

Rule of thumb: if the source is MP4 and you don't know what to pick, stream-copy to .m4a (instant, lossless). If the destination demands MP3, re-encode to MP3 at 192–256 kbps. WAV or FLAC only when you're going to edit or archive.

How to extract audio with FFmpeg (free, command line)

Three one-liners cover almost every job. FFmpeg is free, runs offline on every OS, and the same commands power most desktop GUIs (including FileHop).

1. Lossless — keep the original AAC, instant

ffmpeg -i input.mp4 -vn -acodec copy output.m4a

The -vn drops the video track; -acodec copy stream-copies the audio with no re-encode. Output is bit-perfect, finishes in seconds.

2. MP3 — re-encoded, universal compatibility

ffmpeg -i input.mp4 -vn -ar 44100 -ac 2 -b:a 192k output.mp3

-ar is sample rate, -ac is stereo channels, -b:a is bitrate. Use 128k for voice, 192k for general use, 320k for music — anything above 320k is a waste of bits.

3. WAV — lossless, for editing

ffmpeg -i input.mp4 -vn -acodec pcm_s16le output.wav

Use WAV if you're going to load the audio into Audacity, Logic, Ableton or Premiere for editing. Export back to MP3 at the END of the edit, not in the middle.

Batch / folder

macOS or Linux (bash):

for f in *.mp4; do ffmpeg -i "$f" -vn -acodec copy "${f%.mp4}.m4a"; done

Windows (PowerShell):

Get-ChildItem *.mp4 | ForEach-Object { ffmpeg -i $_.Name -vn -acodec copy ($_.BaseName + '.m4a') }

Install FFmpeg with brew install ffmpeg on Mac, winget install ffmpeg or choco install ffmpeg on Windows, apt install ffmpeg or dnf install ffmpeg on Linux. If you'd rather not touch a terminal, the same job in a GUI is below.

How to extract audio in FileHop

Four steps. The conversion runs entirely inside the desktop app — videos never touch a network.

Open FileHop

Launch the FileHop desktop app on Mac or Windows — or open the Audio Extractor directly. The extractor is on the home screen under Video tools.

Drag your video file in

Drop the video onto the extractor (MP4, MOV, MKV, AVI, WebM, FLV, WMV — FileHop accepts virtually any video format). Or drag a whole folder for batch extraction.

Choose the audio format and quality

MP3 at 192 kbps is a safe universal default. Pick AAC if the source is MP4 and you want lossless and instant; pick WAV or FLAC for editing or archival.

Click Extract

The audio file is written next to the original (auto-uniquified filename, so a previous export is never silently overwritten). For batch jobs, all files are processed in parallel. The original video is left untouched.

Extraction runs entirely inside the desktop app — videos never touch a network. FileHop re-encodes to your chosen format and bitrate (MP3 / WAV / AAC / FLAC). For a bit-perfect stream-copy of the original AAC track with zero re-encode, use the FFmpeg one-liner in the section above — it's the same offline path, no GUI required.

Why offline beats online for audio extraction

Browser-based extractors dominate the search results, but every one of them uploads your file, and most are lead magnets for a paid SaaS. Here's the editorial case for extracting on your own machine.

Privacy: videos belong to the work

Every audio extractor on the first page of Google — Restream, Biteable, Canva, TinyWow, CloudConvert, FreeConvert, Zamzar, Clideo, Rendley, Livestorm — uploads your video to a server, and most are lead magnets for a paid SaaS (Restream Studio, Canva, Biteable, Adobe Creative Cloud, Mux Video API). Videos routinely belong to confidential or client work — recorded interviews under NDA, internal training, unreleased product demos, depositions, medical consultations, journalistic source recordings, raw camera footage. "Secure" on those pages is a privacy policy, not an architecture. One competitor (Flonnect) does claim 100% in-browser WebAssembly processing — that's better than uploading, but it's bound by the tab staying open, your browser's memory limits, and the trust that the JavaScript actually doesn't phone home. FileHop's extraction runs in-process inside the desktop app — no tab, no browser, no network.

File size

Uploading a 5 GB video to a browser tool over a typical 50 Mbps home connection takes 15+ minutes before the conversion even starts; the desktop app starts the second you drop the file. For a 4K source or a long recording, this is the difference between "done" and "still uploading".

Batches

Converting one MP4 to MP3 in a browser is fine; converting a podcast back-catalog, a lecture library, or a year of meeting recordings by hand is hours of file-by-file uploads. A desktop tool runs the whole folder in parallel in seconds.

No caps, no upload limits, no sign-up

Browser converters meter you — Zamzar caps free uploads at 50 MB, CloudConvert and FreeConvert ration daily conversions on the free tier, Restream / Canva / Biteable are lead magnets that put the heavy work behind a paid account. A desktop tool has no daily counter and no file-size ceiling — the only limit is your disk space. No email, no sign-up, no credit card.

For anything more than a one-off, and for anything confidential, extract offline.

Got audio? These pages handle the next steps:

FileHop vs the SERP: how the options compare

Nine ways to extract audio from a video. FileHop is highlighted in blue. Honest about the things every option doesn't do.

Tool	Type	Offline	Free	Uploads your file	Batch / folder	Output formats	Notes
FileHop	Desktop GUI (Mac, Windows)	Yes	Yes	Never	Yes	MP3, WAV, AAC, FLAC, OGG	Re-encodes to your chosen format / bitrate; parallel batch on a folder; auto-uniquified output filenames; no daily caps
Restream / Canva / Biteable	Browser	No	Yes (lead magnet)	Yes	No (free tier)	MP3 (Restream), MP3 + WAV (Canva, Biteable)	Funnels to a paid recording / editing / design SaaS
CloudConvert / Zamzar / FreeConvert	Browser	No	Freemium	Yes	Paid tier	MP3, WAV, AAC, FLAC	Daily-conversion caps on free; Zamzar caps at 50 MB on free
TinyWow	Browser	No	Yes (ad-supported)	Yes (deleted after 1 hour)	No	MP3, WAV	Ad-supported programmatic free-tool network
Flonnect	Browser (WebAssembly)	Yes (in-tab)	Yes	Never (per their claim)	No real batch	MP3, WAV, AAC, OGG, FLAC, WebM	Bound by tab memory; the only browser tool with a real client-side claim
Adobe Premiere Pro	Paid desktop GUI	Yes	No (~£20/mo)	Never	Yes	All	Overkill for the pure extraction job; requires a Creative Cloud account
VLC	OSS desktop GUI (Mac/Win/Linux)	Yes	Yes	Never	Yes (Stream output dialog — fiddly)	MP3, WAV, OGG	No stream-copy option in the GUI; metadata preservation is limited
FFmpeg	CLI	Yes	Yes	Never	Yes (shell loop)	Every format under the sun	No GUI; the recipes earlier on this page cover the common cases

If you live in a terminal, FFmpeg one-liners are the lightest path — and they're the offline answer on Linux, where FileHop has no desktop build today. FFmpeg is also the route to bit-perfect AAC stream-copy (-acodec copy), because FileHop's GUI extractor re-encodes to the format and bitrate you pick. For a desktop GUI on Mac or Windows that never uploads your file and runs real parallel batch with no daily caps, FileHop is free where the desktop competition is paid — and unlike the browser converters, your video never leaves your device.

Related tools & guides:

Common questions about audio extraction

Will I lose audio quality?

Not if you stream-copy. An MP4's audio is usually AAC; copying it to .m4a is bit-perfect and instant (no decoding happens). You only lose quality when you re-encode to a different lossy codec — most commonly AAC → MP3. At 256–320 kbps that loss is inaudible for most listeners, but it is not zero. If quality matters, keep the .m4a; if your destination demands MP3, use 192–256 kbps.

Can I extract from a YouTube link?

FileHop works on local video files, not URLs. The honest workflow is two-step: use yt-dlp (free, open source) to download the YouTube video as an .mp4, then drag the .mp4 into FileHop to extract the audio. Browser "YouTube to MP3" sites mostly violate YouTube's terms and frequently break — and they upload your IP and the URL to a server.

Does extraction work on iPhone / Android?

FileHop is desktop (Mac / Windows). On iPhone, the built-in Shortcuts app can extract audio from a video in the Photos library (Encode Media → set Format to Audio). On Android, the "Audio Extractor: Video to MP3" app on Play Store is the most popular free option. For anything more than a one-off, plug the phone into a Mac / Windows desktop and let FileHop handle the bulk job.

Best practices

Six rules that keep an audio extraction clean.

1 If your source is MP4 / MOV and you don't have a destination requirement: stream-copy to .m4a (lossless, instant). In FileHop: pick AAC. In FFmpeg: -acodec copy.
2 If the destination demands MP3 (a podcast host, an old car stereo, a transcription service that only accepts MP3): re-encode to MP3 at 192 kbps for voice or 256 kbps for music — anything above 320 kbps is a waste of bits.
3 If you're going to EDIT the audio (Audacity, Logic, Ableton, Premiere, DaVinci): extract as WAV. Edit on WAV, then export to MP3 / AAC at the END — never edit on MP3 (every save is a re-encode that compounds artifacts).
4 For a whole folder of files, use a tool with real batch: FileHop (desktop, parallel), Audacity batch macros, or an FFmpeg shell loop. Don't upload them to a browser converter one at a time.
5 Confidential or client recordings — depositions, medical, journalistic source tapes, internal company video — must be extracted offline. Every browser converter on the first page of Google uploads your file; most are lead magnets for a paid SaaS.
6 For a YouTube video, download the .mp4 first with yt-dlp, then extract locally. Browser "YouTube to MP3" sites are a privacy and legal mess.

Free. Offline. Batch. Videos never leave your device. Mac & Windows desktop app.

Open the Audio Extractor

Frequently Asked Questions

How do I extract audio from a video without losing quality? ▼

Stream-copy the audio track instead of re-encoding it. An MP4 / MOV file's audio is almost always already encoded as AAC inside the container, and you can copy that AAC track out into a .m4a file in 1–2 seconds with no decoding and no quality loss — it's bit-perfect because no encoding happens. In FFmpeg: ffmpeg -i input.mp4 -vn -acodec copy output.m4a. Note that FileHop's GUI extractor always re-encodes to your chosen format and bitrate — fine for MP3 / WAV / FLAC, but for a true bit-perfect AAC stream-copy, the FFmpeg one-liner is the offline path (it's free, works on every OS, and finishes in seconds on any size of video). You only lose quality when you ALSO convert the codec (most commonly AAC → MP3); that step is a lossy re-encode, and since the source AAC is already lossy, you stack two lossy passes. At 256–320 kbps the loss is inaudible for most listeners but it is not zero. If quality matters, keep the .m4a.

How do I convert MP4 to MP3 for free? ▼

Three honest free options. (1) FileHop (desktop, Mac & Windows): drag the MP4 into the Audio Extractor, pick MP3 at 192 kbps, click Extract — runs offline, no upload, no daily caps, batch a whole folder at once. (2) FFmpeg (command line, every OS): ffmpeg -i input.mp4 -vn -ar 44100 -ac 2 -b:a 192k output.mp3. Install FFmpeg with Homebrew on Mac, winget or choco on Windows, apt / dnf on Linux. (3) VLC (desktop GUI): Media → Convert/Save, add the MP4, choose "Audio - MP3" profile, save. All three are free with no upload. The browser-based "MP4 to MP3" sites (CloudConvert, Zamzar, FreeConvert, Clideo) upload your file to a server and most have a daily-conversion cap or a paid tier — fine for a one-off public video, not for confidential work.

Can I extract audio from a video offline, without uploading my file? ▼

Yes — install FileHop (free, Mac and Windows) and open the Audio Extractor. Drag your video in, pick the audio format (MP3 / WAV / AAC / FLAC), click Extract. The conversion runs entirely inside the desktop app — videos never touch a network. Every browser-based audio extractor on the first page of Google (Restream, Canva, Biteable, TinyWow, CloudConvert, FreeConvert, Zamzar) uploads your video to a server, and most are lead magnets for a paid SaaS. For confidential recordings — depositions, medical, journalistic source video, internal company recordings — an offline desktop extraction is the only version where the file does not leave your device. (One browser tool, Flonnect, claims in-browser WebAssembly processing — better than uploading, but still bound by your browser tab.)

What's the difference between MP3, WAV, AAC, and FLAC — which should I pick? ▼

MP3 is lossy, ~57 MB per hour at 128 kbps and ~144 MB at 320 kbps — pick it for universal compatibility (every player, every podcast host, every car stereo) when you don't know the destination. AAC (.m4a) is lossy, but if you stream-copy it out of an MP4 there's no re-encode and the file is bit-perfect — pick AAC when the source is MP4 / MOV and you want the audio file at original quality, instantly. WAV is lossless, uncompressed PCM, ~600 MB per hour — pick WAV only if you're going to EDIT the audio in Audacity / Logic / Ableton (edit on WAV, export to MP3 at the END). FLAC is lossless, compressed (~300 MB per hour, about half of WAV) — pick FLAC for archival, classical / acoustic music, or master copies. Rule of thumb: if the source is MP4 and you don't know, stream-copy to .m4a. If the destination demands MP3, re-encode to MP3 at 192–256 kbps. WAV / FLAC only when editing or archiving.

Can I batch extract audio from a whole folder of videos at once? ▼

Yes — if you have more than a handful of files, use a tool with real batch rather than uploading one at a time. FileHop (desktop): drop a whole folder into the Audio Extractor, pick the output format once, all files process in parallel locally. FFmpeg (command line, free, every OS) — bash on macOS / Linux: for f in *.mp4; do ffmpeg -i "$f" -vn -acodec copy "${f%.mp4}.m4a"; done. PowerShell on Windows: Get-ChildItem *.mp4 | ForEach-Object { ffmpeg -i $_.Name -vn -acodec copy ($_.BaseName + '.m4a') }. Audacity also has batch macros (Tools → Macros → Export as MP3) that work on a folder. All three run offline. Browser converters on the SERP either don't offer batch or gate it behind a paid tier — and every file is a separate upload.

How do I extract audio from a YouTube video? ▼

FileHop works on local video files, not URLs — there's no "paste a YouTube link" field. The honest two-step workflow: (1) Download the YouTube video as an .mp4 using yt-dlp (free, open source, every OS) — for example, yt-dlp -f mp4 <youtube-url>. (2) Drag the resulting .mp4 into FileHop's Audio Extractor and pick your output format. Browser "YouTube to MP3" sites mostly violate YouTube's terms of service, frequently break (YouTube's player URLs rotate), and they upload your IP and the URL to a server. yt-dlp + a local extractor is the only path that keeps the conversion on your machine. Note that extracting audio from videos you don't own may violate copyright in your jurisdiction — use this for public-domain / Creative Commons content or for personal recordings.

How do I extract audio from a video on iPhone or Android? ▼

On iPhone, use the built-in Shortcuts app: create a new shortcut with the "Encode Media" action, set Format to Audio, pick the video from Photos, and the audio file goes to Files. Or use Apple's "Export Audio" app from the App Store (free, 4.8 rating) — it reads QuickTime / MP4 directly from Photos. On Android, the "Audio Extractor: Video to MP3" app on Play Store is the most popular free option (4.9 rating, 146,000+ reviews). Both are fine for one-off clips. For anything more than a handful of files — or for confidential / client recordings — plug the phone into a Mac or Windows computer and let FileHop handle the whole folder in parallel in seconds, with no daily caps and no upload.

How do I extract audio from a video using FFmpeg? ▼

Three one-liners cover most jobs. Lossless (keep the original AAC, instant): ffmpeg -i input.mp4 -vn -acodec copy output.m4a — the -vn drops the video, -acodec copy stream-copies the audio with no re-encode. MP3 (re-encoded, universal): ffmpeg -i input.mp4 -vn -ar 44100 -ac 2 -b:a 192k output.mp3 — -ar is sample rate, -ac is stereo channels, -b:a is bitrate (128k for voice, 192k for general use, 320k for music). WAV (lossless, for editing): ffmpeg -i input.mp4 -vn -acodec pcm_s16le output.wav. Install FFmpeg with brew install ffmpeg on Mac, winget install ffmpeg or choco install ffmpeg on Windows, apt install ffmpeg or dnf install ffmpeg on Linux. For a whole folder, wrap the command in a shell loop (see the batch FAQ above). If you'd rather not touch a terminal, FileHop runs the exact same FFmpeg under the hood in a desktop GUI.

How do I extract audio from a video in VLC? ▼

Open VLC, Media → Convert/Save (Ctrl+R on Windows, Cmd+R on Mac), click Add and pick the video, click Convert/Save at the bottom. In the Profile dropdown, pick "Audio - MP3" (or use the wrench icon to switch the codec to MP3 / FLAC / WAV / OGG and the container to .mp3 / .flac / .wav / .ogg). Set the destination filename with the .mp3 / .wav extension, click Start. VLC is free, OSS, runs on Mac / Windows / Linux, and never uploads your file. The downsides vs a dedicated extractor: the Convert/Save dialog is fiddly, batch mode is awkward (technically supported via "Add" multiple files, but the destination filename has to be set per session), no stream-copy option in the GUI (VLC always re-encodes to the chosen profile), and metadata preservation is limited. Fine for a one-off; for a folder of recordings, a dedicated extractor or FFmpeg is faster.

Will the original video file be changed when I extract audio? ▼

No. Every method covered here — FileHop, FFmpeg, VLC, Audacity, Premiere, the browser converters, the mobile apps — writes the extracted audio as a NEW file (e.g., interview.mp4 → interview.mp3) and leaves the original video untouched. In FileHop, the new audio file is written next to the original with an auto-uniquified filename, so a previous export is never silently overwritten. If you want a video file with the audio REMOVED (a silent .mp4), that's a different operation — it's a video re-mux that drops the audio track, not an audio extraction. Most video editors have it as "Detach audio" or "Remove audio track"; in FFmpeg it's ffmpeg -i input.mp4 -an -c:v copy output.mp4 (the -an drops audio, -c:v copy stream-copies the video).