How to use the Audio converter
- Choose an audio or video file.
- Pick the format in "Convert to".
- Choose a quality for MP3, M4A, OGG and other compressed formats. 192 kbps is a good default.
- Click Convert and download your file.
Lossy or lossless?
Lossless formats (WAV, FLAC, ALAC, AIFF) keep every detail and are used for editing and archiving. Lossy formats (MP3, AAC/M4A, OGG, OPUS) remove sounds you are unlikely to hear and make files 5–10 times smaller.
Converting a lossy file to a lossless one does not bring back lost detail; it only stops further loss when you edit.
Picking a bitrate
- 320 kbps: best MP3 quality, for music you care about.
- 192–256 kbps: excellent for most music.
- 128 kbps: fine for podcasts and casual listening.
- 64–96 kbps: speech, audiobooks and voice notes.
Formats you can create
MP3, WAV, M4A, AAC, OGG, OGA, FLAC, OPUS, WMA, AIFF, AIF, AIFC, ALAC, AC3, MP2, M4B, M4R (iPhone ringtone), CAF, AU, WEBA, 3GA and VOC. You can open many more, including AMR, APE and the soundtrack of any video.
Good to know
Video is encoded with H.264 (x264) and AAC unless the format needs something else, and audio uses each format's standard encoder (LAME for MP3, native AAC, Vorbis, Opus, FLAC). When the codecs already match, streams are copied instead of re-encoded.
Supported files
Any common audio or video file: MP4, MOV, MKV, WEBM, AVI and other video formats, and MP3, WAV, M4A, FLAC, OGG, OPUS, WMA and other audio formats. Files up to 1 GB each.
Frequently asked questions
Do tags and album art survive?
Title, artist and album tags are kept when the new format supports them. For full control use the MP3 Tag Editor afterwards.
Which format is best for iPhone?
M4A (AAC) or MP3. For lossless on iPhone use ALAC. For ringtones use M4R.
How much does the Audio Converter cost?
Nothing. It is free with no registration, no watermark and no limit on how many files you convert.
Are my files safe?
Yes. Files are converted locally in your browser and are never uploaded. When you close the page, nothing is left behind.
Can I use it on my phone?
Yes. Open the page in your phone's browser and choose a file. Phones have less memory than computers, so very large files are better converted on a laptop or desktop.