Video to MP3
Video to MP3 Converter
Save clear audio tracks directly from your footage on OnVid with private video to mp3 processing that keeps every file safe on your device.
- 1Drop a video
- 2Pick the quality
- 3Download the MP3
- Never uploaded
- No sign-up
- No watermark
- Files up to 400 MB
Free, no sign-up. Runs in your browser, so your file is never uploaded.
- 1Drop a video
- 2Pick the quality
- 3Download the MP3
- Never uploaded
- No sign-up
- No watermark
- Files up to 400 MB
Kling 3 4K · cinematic
Veo 3.1 native audio
Seedance 2 #1 arena
Wan 2.7 image-to-video
Hailuo 2.3 expressive
Hunyuan open sourceKling 3 4K · cinematicVeo 3.1 native audioSeedance 2 #1 arenaWan 2.7 image-to-videoHailuo 2.3 expressiveHunyuan open sourceWhy pulling the sound out of a video gives your media a second life
Saving the audio track lets you turn speech, music or interviews into files you can listen to anywhere, even with the screen off. When you want new visuals, OnVid's AI video generator makes clips from a prompt or a photo, and some of its models add their own sound.
Pull clear audio tracks with MP3 extraction in your browser
Save MP3 soundtracks on your own device, and turn to OnVid's AI video generator when you want to make new visual scenes.
Free conversions that run on your device
Extract audio tracks directly in your web browser without creating an account or paying fees. The underlying engine processes your media locally using WebAssembly, which keeps your personal footage entirely on your device. There is no upload step, so nothing waits on your internet connection; how fast it finishes depends on your device. The MP3 has no watermark.
Select custom bitrates up to 320 kbps
Control sound fidelity by choosing between standard 128 kbps, balanced 192 kbps, or crisp 320 kbps output settings. Lower bitrates create lightweight files ideal for quick voice memos and voiceover backups. Higher settings keep more detail for music and interviews. These three are the only choices: the tool has no other bitrates or audio formats.
Process large media clips up to 400 MB
Handle substantial footage clips without experiencing restrictive file-size bottlenecks. The in-browser processor readily accepts MP4, WebM, MOV, MKV, and AVI containers up to 400 MB in size. You can extract audio from recordings like webinars, phone captures, or screen recordings in a single pass. Once finished, you can use related utilities like our loop video tool or aspect ratio calculator to prepare companion clips.
Protect file privacy with browser processing
Keep sensitive recordings secure because files are never uploaded to a remote cloud server. Everything executes locally on your hardware, eliminating privacy risks associated with remote file storage. This makes the converter a good fit for sensitive meetings and private voice journals. Your original clip stays safely stored on your local disk throughout the extraction.
Turn extracted audio into new AI videos
Once your MP3 is saved, you can make visuals to pair with it in OnVid's AI video generator, from a text prompt or a photo. AI video generation needs sign-up and runs on credit-based Pro and Max plans, with clips up to 30 seconds on Pro and 60 seconds on Max.
Who pulls audio from clips, and how they use it
Creators, students and editors turn recordings into MP3 files right in the browser, without extra editing software.
Podcasters turning video interviews into audio episodes
Podcasters save the sound of a recorded video interview as an MP3, so they can edit and publish it as an audio episode without re-recording. Files up to 400 MB work, and 320 kbps keeps the most detail for hosting platforms.
Every leading video model, one studio
Match the right engine to each idea — no extra accounts, no juggling tools.
Cinematic 4K text-to-video with native audio and multi-shot consistency.
The only model with synchronized dialogue and sound.
Film-grade generation with strong prompt adherence and synced audio.
Sharp, physically accurate motion in crisp 4K.
Native 2K motion with synced audio and omni-reference — the Hailuo 3 generation.
Expressive, characterful motion with lively faces.
Black Forest Labs' unified image + video + audio model, with clips up to ~20 seconds.
Native 4K clips up to 30s with synced sound.
Fast clips with synced native audio.
| Model | Resolution | Max length | Best for | Speed |
|---|---|---|---|---|
| 1080p | 5s / 10s | Cinematic, multi-shot | Max quality | |
| 720p / 1080p / 4K | 8s | Native audio | Balanced | |
S2 Sora 2 | 720p / 1080p | 4s / 8s / 12s | Prompt adherence | Balanced |
| 480p / 720p / 1080p | 5s / 10s | Sharp motion | Fast | |
| 768p / 2K | 5s / 10s | 2K detail with sound | Balanced | |
| 768p | 6s / 10s | Expressive motion | Fast | |
| 1080p+ | ~20s | Unified multimodal | Max quality | |
| 480p / 720p / 1080p | 5s / 10s | References + video remix | Fast | |
| 480p / 720p | 6s | Fast clips with sound | Balanced |
How to convert video to MP3
Three steps, all inside your browser, with nothing uploaded.
Drop in your video
Drop or choose a video file up to 400 MB. No account is needed, and the file stays on your device.
Choose your audio bitrate
Pick 128 kbps for small files, 192 kbps for everyday listening or 320 kbps for the most detail, then click Extract MP3.
Preview and download
Play the MP3 in the preview, then click Download to save it. No watermark is added.
How does video to mp3 conversion actually work?
Learn how the converter runs in your browser without uploading your file, which bitrate to pick, and which videos it accepts.
How does video to mp3 extraction work in your browser?
You can extract audio from video free without installing desktop software or sending your files to a server. The converter runs FFmpeg compiled to WebAssembly inside your web browser: it reads the sound from your video and encodes it as an MP3 on your own computer or phone.
The first time you use it, the browser downloads the roughly 30 MB engine once. Files up to 400 MB work, and how long a conversion takes depends on your device and the length of the video.
Info: Your media stays on your device: local processing means zero cloud uploads and full privacy for your personal files.
What bitrates should you choose for custom sound quality?
When you convert MP4 to MP3 online, audio bitrate determines the exact balance between file size and listening clarity. Selecting a standard 128 kbps bitrate produces compact tracks ideal for spoken voice memos, while 192 kbps offers balanced fidelity for casual listening across mobile devices.
For music or detailed sound, 320 kbps keeps the most detail of the three. MP3 is a lossy format, so the result never sounds better than the audio in your video; a higher bitrate simply loses less of it.
Is a free video to mp3 tool truly private and secure?
Using a free audio extractor online should never force you to hand over personal footage to unknown third-party servers. OnVid executes the full conversion pipeline locally via browser memory, meaning private recordings, team presentations, and camera clips never leave your device.
There is no account creation, no cloud storage queue, and no watermark added to your exported sound file. Once the conversion finishes, your mp4 to mp3 result downloads directly to your local storage, keeping your workflow quick, safe, and frictionless.
Tip: Free, no sign-up, runs in your browser without uploading files to external cloud storage.
Can you handle downloaded clips from online video platforms?
Many people want to extract audio from YouTube video clips or saved social posts. This tool does not take links: it works only on a video file saved on your device, so use files you made or have the right to use.
For example, a 45-second MP4 interview recorded on your phone becomes a 45-second MP3 at the bitrate you pick, ready for offline listening. If you then want new visuals, OnVid's AI video generator can make a clip from a prompt after you sign up.
What audio and video file formats can you process?
The converter accepts MP4, MOV, WebM, MKV, AVI and other common video files. The output is always an MP3 file; it does not make WAV, AAC or other audio formats.
The video needs an audio track: if it has none, the tool tells you there is nothing to extract. The MP3 you get plays in any media player, car stereo or phone.
Info: Supported containers include MP4, WebM, MOV, MKV, and AVI with audio extraction directly in your browser.
Made with OnVid
Real clips generated from a single prompt — hover any card to play.
MiniMax H3Seedance 2Kling 3Hailuo 2.3Video to MP3 questions, answered
Find straightforward details about audio quality, supported formats, and how the browser converter keeps your files private.
How does video to mp3 conversion work on OnVid?
OnVid's converter runs in your web browser using FFmpeg compiled to WebAssembly. Your file stays on your computer or phone and is never uploaded to a server. It reads the sound from your video and saves it as an MP3 you can preview and download.
What audio bitrates can you select when you convert video to MP3?
You can export your audio track at 128 kbps, 192 kbps, or 320 kbps. Lower bitrates create compact audio files suitable for voice notes, while 320 kbps preserves maximum fidelity for complex background music.
Is the free video to mp3 tool completely free to use?
Yes. The browser tool is free, needs no sign-up and runs in your browser. It does not use plan credits or add watermarks, so you can convert personal recordings without creating an account.
How can you extract audio from video free without installing software?
You can extract audio from video free by opening OnVid's browser utility and dropping your clip into the drop zone. The engine on your device drops the picture and saves an MP3 straight to your local downloads folder.
Which video formats does the converter accept?
It accepts MP4, MOV, WebM, MKV, AVI and other common video files up to 400 MB. The output is always an MP3 at 128, 192 or 320 kbps. For MP4 files only, there is also a dedicated MP4 to MP3 page with the same options.
Can you extract audio from YouTube video links directly?
No, OnVid does not extract audio from YouTube video URLs or third-party streaming links. You must provide a local video file from your hard drive or phone storage to separate the soundtrack inside your browser.
What is the maximum file size supported by this free audio extractor online?
This free audio extractor online handles source video files up to 400 MB. Because processing runs entirely within local device memory, how long it takes depends on your device and the length of the video.
What makes OnVid able to convert video to MP3 fast?
There is no upload and no server queue: the work starts on your device as soon as you click Extract MP3. The first use downloads the roughly 30 MB engine once. After that, speed depends on your device and the length of the video.
Does extracting audio reduce the original sound quality?
A little. MP3 is a lossy format, so the tool re-encodes the sound and some detail is always lost. Choosing 320 kbps keeps the most detail of the three options; the result can never sound better than the audio in your original video.
Why did my audio conversion fail in the browser?
Conversions usually fail if the video has no audio track, is over the 400 MB limit or uses a codec the browser engine can't read. Closing background browser tabs frees up system memory so the engine can parse high-resolution media smoothly.
Can you generate AI videos with native sound on OnVid?
Yes, OnVid's AI video generator includes advanced models such as Seedance 2.0 and Seedance 2.5 on Pro and Max plans. These models create dynamic video clips up to 1080p accompanied by realistic native audio.
What are the key limitations of the browser audio converter?
It converts one video at a time into an MP3 at 128, 192 or 320 kbps. It has no trimming, no metadata editing, no batch mode, no stem separation and no other audio formats, and it cannot download from links.
Got your audio? Now give it an AI video
Turn your video into an MP3 right in your browser, with no uploads, no sign-up and no watermark.