--- title: "Extract audio from a video to MP3, WAV or M4A, free | Kuro" description: "Save the sound of an MP4, MOV, WebM or MKV as MP3, WAV or M4A, free and with no upload. AAC sound becomes an M4A without re-encoding." canonical_url: "https://meetkuro.com/tools/extract-audio/" locale: "en" tool: "extract-audio" --- # Extract audio from a video Drop a video and keep only its sound, as an MP3, a WAV or an M4A. When the video's sound is AAC, as it is from most phones and cameras, the M4A is made by copying it as it is: seconds, with nothing lost. Your file never leaves this device. Everything runs in your browser. [Extract audio from a video](https://meetkuro.com/tools/extract-audio/) ## Made for - [MP4 to MP3](https://meetkuro.com/tools/extract-audio/mp4-to-mp3/) - [Video to WAV](https://meetkuro.com/tools/extract-audio/video-to-wav/) - [MP4 to M4A](https://meetkuro.com/tools/extract-audio/mp4-to-m4a/) ## How it works 1. Drop your video. 2. Pick MP3, WAV or M4A. The tool says whether the sound is copied or re-encoded. 3. Press Extract and download the sound file. ## Questions ### Which format should I pick? MP3 plays on almost anything. WAV is uncompressed, the format editors and DAWs take without converting. M4A is AAC sound in an MP4 container: it's what most phones and cameras record, so it's usually copied rather than re-encoded. ### Does extracting lose quality? Not when the sound is copied into an M4A, and not in a WAV, which stores the decoded sound uncompressed. An MP3, or an M4A made from sound that isn't AAC, is re-encoded at 192 kbps, which keeps music and speech clear but, like any re-encode, isn't bit-for-bit the original. ### Is there a length limit? Files up to 2 GB, and no limit on length: sound is quick to encode. A WAV gets large, though: about 11.5 MB a minute for 48 kHz stereo. ### Can I keep only part of the sound? Trim the video first with Trim a video. Its fast mode cuts without re-encoding. Then drop the trimmed file here. ### Does my video get uploaded? No. The sound is read and written in your browser, on your device. ### Which browsers does it work in? Current Chrome, Edge, Safari and Firefox. Browsers have no MP3 encoder of their own, so the page loads LAME, the open-source MP3 encoder, compiled to WebAssembly (about 300 KB, from this site) the first time you make an MP3. If your browser can't read the sound in your file, the tool says so before it starts. ## Kuro In Kuro you make the sound itself: a voice-over from your script in the voice you pick, or music from a few words. [Make a voice-over in Kuro](https://app.meetkuro.com/create?type=voiceovers&utm_source=tools&utm_medium=tool&utm_campaign=extract-audio) — Kuro opens the voice-over composer. ## More free tools - [Compress a video](https://meetkuro.com/tools/compress-video.md): Make a video small enough for Discord, email or WhatsApp. - [Resize a video](https://meetkuro.com/tools/resize-video.md): Turn a video into 9:16 for TikTok, Reels and Shorts, or 4:5, 1:1 or 16:9. - [Crop a video](https://meetkuro.com/tools/crop-video.md): Cut a video down to the part you want to keep, at its own size. - [Rotate a video](https://meetkuro.com/tools/rotate-video.md): Turn a video the right way up, or mirror it. - [Safe-zone checker](https://meetkuro.com/tools/safe-zone-checker.md): See where TikTok, Reels and Shorts will cover your video before you post. - [Trim a video](https://meetkuro.com/tools/trim-video.md): Cut a video down to the part you want, in seconds. --- ## About Kuro Kuro is an AI picture studio: prompt-driven images, clips, voice-overs and music, and storyboard-backed films with consistent characters across every scene. Agents connect over MCP and can generate directly: ``` claude mcp add kuro https://api.meetkuro.com/mcp --transport http ``` The app is at https://app.meetkuro.com and requires an account. Each guide, model page, comparison and free tool page on this site (not a tool's variants, and not the index pages) has a Markdown twin at its own URL plus `.md`, and so do /benchmarks/, the English /agents/ page (as /agents.md) and the MCP tool reference. Free video tools: https://meetkuro.com/tools/