How do I convert audio to MP3 or WAV online?

Load your file into the GoChronos Audio Converter, pick MP3 or WAV output (and bitrate for MP3), and export. It decodes MP3, WAV, FLAC, M4A/AAC and OGG entirely in your browser — no upload.

Can I compress an audio file to make it smaller?

Yes. The Compress mode offers five quality presets from 320 kbps down to 64 kbps with a live size estimate, so you can shrink a file before exporting. Voice is usually transparent at 96 kbps.

Can I extract the audio from a video?

Yes. The Extract mode pulls the soundtrack out of MP4, MOV and WebM videos and saves it as MP3 or WAV — the video is decoded locally and never uploaded. AVI and MKV aren't browser-decodable.

Can I change the sample rate or convert to mono?

Yes. The Convert mode lets you resample (16 kHz–48 kHz) and switch between mono and stereo.

Is the Audio Converter free?

Yes. Free on GoChronos, processed on your device, works offline.

OPUS to MP3 Converter Free — In Your Browser, No Upload

Opus is what messaging apps and Discord record; MP3 is what editors and players accept. Decoded and re-encoded on your device, at a bitrate you choose.