Audio Converter free and online

  • 100% locally in browser
  • No uploads
  • Multiple conversions
  • No ads
No file yet
You can also select multiple source formats at once and convert them to a single target format.
▶ Options MP3, 320 kbps, CBR
Format and quality
Auto keeps the channel count from the source.
Loudness and effects
dB
May cause clipping.
Reverse audio
Plays the result backwards.
0 means disabled.
0 means disabled.
Advanced
Only use this if you know what you are doing.
0%
Conversion runs locally in your browser.
  • File is not displayed. Make sure that it is a genuine WAV file and that the file extension has not simply been changed. The WAV format is supported.
  • Multiple files are not accepted. You can select multiple WAV files at once or add them using drag and drop. If nothing happens, reload the page and try again.
  • Conversion does not start. Check whether JavaScript is enabled in your browser. If necessary, test the page in a current browser such as Chrome, Edge, or Safari.
  • Progress is stuck. The conversion runs completely locally in the browser. This may take some time for large or long WAV files. Wait until the processing is complete.
  • 100 percent reached, but no download possible. Check whether your browser is blocking downloads. If necessary, disable pop-up or download blockers and reload the page.
  • Download all MP3 files does not appear. The button is only displayed if at least two files have been successfully converted.
  • Very large file. WAV is uncompressed and can be very large. For long recordings, conversion may take several minutes. Close other programs to free up memory.
  • File cannot be decoded. The WAV file may be damaged or contain an unusual format. Export the file again as standard WAV with 16-bit or 24-bit.
  • Conversion stops on mobile devices. The page must remain in the foreground until the conversion is complete. The process may pause if you switch apps or lock the screen.
  • No download on iPhone or iPad. Tap and hold the download button and select Save to Files. Downloads may be blocked in private mode.
  • MP3 sounds different than WAV. MP3 is a compressed format. For highest quality, select 320 kbps in the options.
  • Browser responds slowly. Very large WAV files require a lot of memory. If possible, use a desktop browser for long recordings.
  • File is being converted but does not appear in the list. Reload the page and add the file again. Make sure the upload is complete before clicking Convert.
If you continue to experience problems, try a different up-to-date browser or reduce the file size by using shorter sections.
  • Use our affiliate links and support our work.

Our website is free of external advertising banners and fake download buttons. By making a purchase from our affiliate partners Amazon* or Thomann*, you won’t pay any more and you will be supporting us. Thank you!

With our audio converter, you can quickly and securely convert between popular audio formats. All processing takes place directly in your browser. Your files are not uploaded to a server and are not stored. Whether you want to convert WAV to MP3, compress FLAC for streaming, or extract audio from an MP4 file, you’ll find all the important conversions in one place here. Ideal for music production, podcasts, voice recordings, streaming, or archiving.

Using Audio Converter: How it works

Our audio converter converts any audio file into the desired audio format. This conversion is done without uploading. Your data is processed using browser-internal features. This means that none of your audio information is transferred to our server. Your audio data remains with you at all times. The tool is 100% free. You can convert multiple files one after the other, and there is no upload or conversion limit. How audio conversion works:
  1. Select a file or add it via drag and drop
  2. Specify the target format
  3. Optionally select bitrate or other settings
  4. Start conversion
  5. Download file directly
No registration required. No file size limits imposed by the server. No installation necessary.

Which quality should you choose?

The optimal setting depends on the selected target format and the intended use. As a general rule, the smaller the audio file, the greater the compression and thus the greater the loss of quality. Therefore, always use the highest quality setting whenever possible. If you want to save data, follow the information below:

Lossless formats such as WAV, FLAC, or ALAC

These formats store audio without any loss of quality.
  • No bit rate selection required for WAV
  • FLAC and ALAC compress without loss
  • Ideal for archiving, production, and further processing
Recommendation: Always keep a lossless format for master files.

Lossy formats such as MP3, AAC, OGG, or OPUS

These formats reduce file size through compression. Here, you can typically choose a bitrate.

Lower bitrate:
Smaller file, lower sound quality
Suitable for speech or simple applications

Medium bitrate:
Good compromise between quality and size
Suitable for streaming

High bitrate:
Better sound quality
Larger file
Suitable for music

Extract audio from video

With MP4 or WEBM, the audio track is converted to an audio format. The quality depends on the original format of the audio track.

Technical details about the audio converter

Supported input formats: WAV, MP3, M4A, AAC, FLAC, OGG, OPUS, WMA, AC3, ALAC, AIFF, WEBM, MKV, MP4
Supported output formats: WAV, MP3, M4A, AAC, FLAC, OGG, OPUS, WMA, AC3, ALAC, WEBM
Bitrates or quality: flexibly adjustable
Processing: locally in the browser
Compatible with: Windows, macOS, Linux, iOS, Android

The conversion is based on proven audio codecs and ensures clean, efficient compression while maintaining good sound quality.

Why our audio converter is special

Many online converters upload your files to external servers. This can be problematic for sensitive voice recordings or unpublished music projects.

Our tool works differently.

  • The conversion runs entirely locally in the browser
  • No files leave your device
  • No cloud storage
  • No analysis of your audio data
  • No ads or annoying banners

Data protection is crucial, especially for studio recordings, podcasts, or customer projects.

WAV, FLAC, or MP3—which format is the right one?

WAV stores audio uncompressed and is ideal for production and archiving.

FLAC offers lossless compression and reduces file size without compromising quality.

MP3 is a lossy format that uses psychoacoustic compression to significantly reduce file size and is particularly suitable for streaming and shipping.

The choice depends on whether you need maximum quality or minimum file size.

Popular audio conversions

WAV to MP3

Convert large, uncompressed WAV files into space-saving MP3 files. Ideal for streaming, shipping, and mobile use.

MP3 to WAV

Convert compressed MP3 files back to an uncompressed format. Handy for further processing or editing.

FLAC to MP3

Convert lossless audio to a compatible, compressed format. Perfect for music libraries and streaming platforms.

MP3 to FLAC

Convert MP3 files to a lossless container format. Useful for archive structure and uniform libraries.

MP4 to MP3

Extract audio from an MP4 file and save it as MP3. Ideal for interviews, recordings, or music clips.

AAC to MP3

Convert AAC files to the widely used MP3 format. Compatible with almost all devices and players.

Frequently asked questions about audio converter conversion

Is the audio converter really free?

Yes. All conversions are free to use. There are no hidden fees, no registration required, and no time restrictions.

No. All processing takes place locally in your browser. Your audio files are not uploaded or stored on external servers. Your data remains on your device at all times.

Supported input formats: WAV, MP3, M4A, AAC, FLAC, OGG, OPUS, WMA, AC3, ALAC, AIFF, MKV, as well as audio extraction from MP4 and WEBM files.

Since no servers are used, there is no traditional upload limit. The maximum file size depends solely on the performance of your device and browser.

That depends on the intended use.
Lossless formats such as WAV or FLAC are suitable for production and archiving.
Lossy formats such as MP3 or AAC are ideal for streaming, shipping, and mobile use.

The duration depends on the file size, format, and performance of your device. Since processing takes place locally, conversion is usually very fast.

Yes. The converter is compatible with modern browsers on Windows, macOS, Linux, iOS, and Android. However, a powerful device is recommended for large files.

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Links marked with * are affiliate links. There are no additional costs for you, some of these links are with an automatic discount for you. We mark these links for transparency and would never recommend bad products. Find out more here: Our partners.

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