Audio Converter

What Audio Converter does

Audio Converter re-encodes audio into a different file format, one output for every input. It does not trim or merge anything: each recording keeps its full length and comes out as its own file.

Because it works through a queue, it handles a single song or a whole folder of voice memos the same way. Typical jobs are shrinking WAV recordings into MP3s, or making M4A files usable in software that expects another format.

How to use it

1. Select Add files and choose one or more audio files. They are added to the end of the queue.
2. Select a file to see its length, size, codec, channels, and sample rate under Selected File Details.
3. Arrange the list with Up and Down, or use Remove and Clear. Files are processed from the top down.
4. Choose a format from Convert to, then select Convert.
5. When the last file finishes, your browser offers to save the output: the file itself for a single input, or one ZIP archive for several.

Formats and limits

• Accepted inputs: MP3, WAV, M4A, AAC, FLAC, OGG, OPUS, WMA, AIF, AIFF, ALAC, and AC3. Files with any other extension never enter the queue.
• Encoder settings per output: MP3, AAC, M4A, and AC3 at 192 kbps; Opus at 160 kbps; OGG Vorbis at quality 5; FLAC at its highest compression level; WAV and AIFF as 16-bit PCM.
• WAV and AIFF are always written at 44.1 kHz in stereo. The other formats normally keep the source sample rate and channel count.
• Each output keeps its original name with the new extension. A batch arrives as audio-converter-mp3.zip, or the matching name for the format you chose.
• Embedded tags and album art are stripped during conversion.

Settings explained

Convert to

The target format for every file in the queue. MP3 and M4A are small and widely supported, while FLAC and WAV avoid any further compression loss.

Advanced logs

Writes the detailed FFmpeg output into the Status log, along with a note whenever a file's details could not be read.

Further reading

• MP3, WAV, or FLAC - Choose audio for sharing, editing, or archiving and check the settings Audio Converter actually uses.

Privacy

Conversion takes place inside this browser tab. The only thing fetched is the FFmpeg engine itself, which is program code downloaded from the jsDelivr CDN, or from this site if the CDN cannot be reached. Your audio is read from disk, re-encoded in memory, and saved back to your device, and nothing in the queue is uploaded.

FAQ

Will converting to FLAC or WAV improve the sound?

No. A lossless format stores exactly what it receives, so an MP3 turned into FLAC keeps the MP3's quality in a larger file. It helps with editing and compatibility, not with restoring detail.

What happens if one file in a batch fails?

The batch stops at that file and the error appears in the Status log. Files finished before it are still offered for saving.

Why did my mono recording come out as stereo?

WAV and AIFF output is fixed at two channels. Choose FLAC to keep the original channel layout without compression loss.

I canceled the save dialog. How do I get my files?

Select Convert again. Finished files are not held for a second attempt, so the queue is processed once more.

Related tools

• Audio Cutter - keep only part of a recording, and pick its format when you save.
• Audio Joiner - merge several files into one track instead of getting one output per file.
• Audio Tag Editor - fix the title, artist, and cover art of a converted MP3.
• Extract Audio From Video - save the soundtrack of a video as an audio file.
• Media Info - check the codec and bitrate of a file before converting.