Any format · Free · No Upload
Free Online Audio Converter — Any Format
Drop any audio or video — MP3, WAV, M4A, OGG, OPUS, FLAC, WMA, AMR, and dozens of others — and choose the output format. Everything happens in your browser: your file never leaves your device.
100% local processing: your file never leaves your device. Once the page loads, it even works offline.
Supported formats:Any audio or video up to 500 MB — processed locally · Video and virtually any audio format are also accepted — we extract the audio automatically.
How it works
- 01
Drop any audio or video
Drag the file into the area above or click to select it. If it's a video, the audio track is extracted automatically. Up to 500 MB per file, all processed locally.
- 02
Choose the output format
MP3, WAV, and M4A are featured, with 20+ other formats in the picker — from FLAC and ALAC (lossless) to AMR and GSM (telephony). FFmpeg runs as WebAssembly right in the page.
- 03
Download the result
Your converted file is ready to download in seconds. Convert as many files as you want — there's no usage limit.
Frequently asked questions
Which formats does the converter accept?
Practically anything FFmpeg can read: MP3, WAV, M4A/AAC, OGG, OPUS, FLAC, WMA/ASF, AMR, AIFF, CAF, AU, GSM, AC3, MP2, WavPack, and more — plus videos (MP4, MKV, WEBM, MOV, AVI…), from which the audio track is extracted.
Which formats can I convert to?
MP3, WAV, M4A, OGG, OPUS, and FLAC are featured, plus 20+ formats in the full picker: lossless (AIFF, ALAC, WavPack, TTA), compatibility (WMA, AC3, MP2, AU, iPhone ringtone M4R), and telephony (AMR, GSM, G.722, Speex).
Can I convert audio from a video?
Yes. Send a video (MP4, MKV, WEBM, MOV…) and the converter extracts the audio track and converts it to your chosen format — ideal for turning recorded classes, live streams, and meetings into MP3.
Is the converter really free?
Yes, free and unlimited. Processing happens in YOUR browser (WebAssembly), so we don't have server costs — and you don't need to create an account.
Is my file sent to any server?
No. All processing is local (FFmpeg compiled to WebAssembly running on the page). The file never leaves your device—it even works offline after the page loads.
Is there a size or quantity limit?
The limit is 500 MB per file (browser memory). There is no limit on the number of uses. For larger files, VoxScriber processes them on the server with uploads up to 5 GB.
What if I need a transcript of this audio?
After converting, you can transcribe the file with AI in VoxScriber: 30 free minutes per month, with automatic punctuation and speaker identification.
Need the text from this audio? Transcribe with AI — 30 min free
Create free account →30 minutes/month free. No credit card required.