Test the actual file, not just its extension
A filename ending in .m4a, .ogg, or .webm identifies a container, but the audio codec inside can still vary. This checker first asks the native media element about the reported MIME type, then tries to decode the file with the Web Audio API.
Playback and editing are different capabilities
A browser may play a file in its built-in player but not expose it to Web Audio processing, or decoding can succeed even when the file's MIME label is missing. SuperUtils reports the two signals separately so you can understand whether the file is likely to work in the audio trimmer, silence remover, and speed changer.
Common browser audio formats
MP3 and WAV are broadly supported in modern browsers. AAC is often carried in M4A or MP4, Opus may be carried in OGG or WebM, and FLAC support depends on the browser and device. Testing this exact file is more dependable than relying on a generic chart.
Frequently asked questions
How can I check whether an audio file works in my browser?
Choose the file and SuperUtils tests the browser media player and Web Audio decoder locally, then reports support for this browser.
Does a file extension guarantee compatibility?
No. MP4, M4A, WebM, and OGG are containers that can hold different codecs. A browser must support both the container and the codec inside it.
Is this a universal browser compatibility test?
No. It is an exact test of the browser and device you are using now. Other browsers or operating systems may support different codecs.