Free online audio converter

Convert any audio or video file to MP3, WAV, FLAC, AAC, M4A or OGG in a few clicks. Choose the bitrate and mono or stereo output — for example, MP4 to MP3, WAV to MP3 or M4A to MP3.

Supported formats: AVI, MP4, WAV, MP3, FLAC, AAC, M4A, OGG. Free, no sign-up.

How to convert a file to MP3 or another format

  1. Click “Convert a file”.
  2. Choose mono or stereo.
  3. Select the output format and bitrate.
  4. Select your file — conversion starts automatically.
  5. Download the converted file.

Features

  • Six output formats. WAV, MP3, FLAC, AAC, M4A and OGG.
  • Video to audio. Extract the sound from MP4 or AVI video to MP3 or any other supported format.
  • Bitrate 128–320 kbps. Pick the balance between file size and quality for MP3, AAC, M4A and OGG.
  • Mono or stereo. Mono makes files smaller and is ideal for speech; stereo keeps music spatial.
  • Free, no registration. No watermarks and no account.

Who it is for

  • Saving the soundtrack of a video as MP3
  • Making large WAV recordings smaller
  • Preparing files for podcasts and messengers
  • Converting files for devices that only support certain formats

Frequently asked questions

How do I convert MP4 to MP3?

Open the converter, choose MP3 and a bitrate, select your MP4 file and download the MP3 after conversion.

Which formats can I convert to?

WAV, MP3, FLAC, AAC, M4A and OGG.

Which bitrate should I choose?

128 kbps is enough for speech; 256–320 kbps is better for music. WAV and FLAC are lossless, so the bitrate option does not apply to them.

Is the audio converter free?

Yes, it is free, without registration or watermarks.

Other free tools

  • Audio to text — Transcribe MP3, WAV, M4A, OGG, FLAC and AAC recordings into text with AI.
  • Video to text — Get a transcript of an MP4 or AVI video: lectures, webinars, interviews, calls.
  • Subtitle generator — Automatically create SRT subtitles with timings for video and audio.
  • Extract audio from video — Split MP4 or AVI into an audio track and a silent video.

Support the project

AI Recognizer is free and has no sponsors, while speech recognition servers cost money. If the service helps you, please consider a donation. You can also view our upcoming plans and leave feedback.