🎵Audio & Video Converter

Online audio and video converter — MP3, WAV, FLAC, MP4, WebM and more

Our free media converter transforms files between audio formats (MP3, WAV, FLAC, OGG, M4A, AAC, Opus) and video formats (MP4, WebM, MKV, MOV, GIF). Extract the audio from a clip (MP4 to MP3), turn a track into a video with a background (MP3 to MP4), or convert a recording to a lighter format. Upload one or more files, choose the target format and click “Convert”.

Conversion in the browser — your files stay with you

Unlike most online converters, nothing here is sent to a server. On first use your browser downloads the FFmpeg engine (WebAssembly), and all processing — decoding, encoding, changing the container — happens locally on your device. That means full privacy, no server-imposed size limits, and it even works offline once the engine has loaded. Video encoding can be slower than in the cloud because your own CPU does the work — so be patient with large recordings.

Frequently asked questions

Is the audio and video converter free and safe?

Yes, completely free and without limits. The entire conversion happens only in your browser — files are never sent to a server, so nobody but you can see them. That also means no queues and full privacy.

How do I convert an MP4 video to MP3 (extract the audio)?

Upload the MP4 (or any video), choose MP3 as the target format and click `Convert`. The tool extracts just the audio track and saves it as an MP3 — perfect when you only want the music from a clip or recording.

Can I convert MP3 to MP4?

Yes. Because a video file needs an image, we add a black background at your chosen resolution (e.g. 1280×720) to the audio track. The result is a ready MP4 — for example to upload a track to YouTube. Pick MP4 as the target and set the background resolution.

Which formats does the converter support?

Audio: MP3, WAV, FLAC, OGG, M4A, AAC and Opus. Video: MP4, WebM, MKV, MOV and GIF. You can convert audio to audio, video to video, extract audio from video, and turn audio into video with a background.

Why is video conversion sometimes slow?

Everything runs locally on your CPU (not on a server), and H.264 or VP8 video encoding is demanding. For large files it can take a while and use a lot of memory. Audio and GIF are fast — for video, start with shorter clips.

Do my files leak anywhere?

No. The conversion engine (FFmpeg compiled to WebAssembly) is downloaded once, and the actual processing happens in your browser's memory. Your recordings never leave your device.