The transcriber accepts anything your browser can decode. This table shows typical support.
| Format | Extensions | Chrome / Edge | Firefox | Safari | Notes |
|---|---|---|---|---|---|
| MP3 | .mp3 | Yes | Yes | Yes | Most common podcast and voice format. |
| WAV | .wav | Yes | Yes | Yes | Uncompressed; large files, best quality. |
| M4A / AAC | .m4a, .aac | Yes | Yes | Yes | iPhone voice memos and many recorders. Firefox support depends on the system. |
| OGG / Opus | .ogg, .oga, .opus | Yes | Yes | Newer versions | Common from messaging apps. |
| FLAC | .flac | Yes | Yes | Yes | Lossless compression. |
| WEBM audio | .webm, .weba | Yes | Yes | Newer versions | Browser and screen recordings. |
| MP4 video | .mp4 | Usually | Usually | Usually | The audio track is used; very large videos may run out of memory. |
Convert it to MP3 or WAV with a free tool such as Audacity or ffmpeg, then try again. Damaged files and DRM-protected audio cannot be decoded.
Support notes reflect current browser releases as of November 12, 2026 and can vary by operating system.