File Converter

M4A to OGG converter Free, private, no upload.

Convert M4A files to OGG right in your browser. OGG Vorbis is open and royalty-free, and is widely used in games and open-source software. Your files are never uploaded.

or drop files anywhere · paste with Ctrl/⌘ + V

How to convert M4A to OGG

  1. 1 Drop your M4A files onto the page, or click “Choose files”. You can add many at once, or a whole folder.
  2. 2 OGG is already selected as the output. Optionally open Options to adjust bitrate, sample rate, channels.
  3. 3 Click Convert, then Save. Converting several files? Save them all as one ZIP.

About the formats

M4A · MPEG-4 audio

M4A is an audio file in an MPEG-4 container, usually AAC. iTunes, Apple Music and Voice Memos use it.

OGG · Ogg Vorbis audio

OGG (Vorbis) is an open, royalty-free lossy audio format used in games, Linux software and some streaming services.

The conversion runs on your device using FFmpeg compiled to WebAssembly. You can adjust: bitrate, sample rate, channels, normalise loudness, start at, end at.

Frequently asked questions

How do I convert M4A to OGG?

Drop your M4A files onto the page, or click “Choose files”. You can add many at once, or a whole folder. OGG is already selected as the output. Optionally open Options to adjust bitrate, sample rate, channels. Click Convert, then Save. Converting several files? Save them all as one ZIP.

Are my files uploaded to a server?

No. The conversion runs entirely in your browser using WebAssembly. Your files never leave your device, so it is safe for private photos, contracts and business data. Once the page has loaded it even works offline.

Will converting M4A to OGG reduce quality?

OGG uses lossy compression, so some detail is traded for a smaller file. At the default quality the difference is very hard to see or hear, and you can raise the quality setting if you need more.

Can I convert multiple M4A files to OGG at once?

Yes. Add as many M4A files as you like; they are converted in parallel on your device and you can download them all as a single ZIP.

Is it free? Are there limits?

It is free, with no sign-up, no watermark and no daily limits. Because nothing is uploaded there is no upload size limit either; the only limit is your device’s memory, which matters mostly for very large videos.

See everything the M4A converter and the OGG converter can do.