About Hemiley Audio Tools
Hemiley Audio Tools is a free collection of browser-based converters and transcription tools — extract sound from MP4 or MOV videos, turn speech into text, convert lossless FLAC or WAV into MP3, and convert between MP3, M4A, and AAC.
Pick a converter below, upload a file, and download the result. The first conversion loads a local converter engine in your browser; files are not sent to Hemiley servers for processing.
- Video to text transcription from MP4, MOV, WebM, and MKV
- MP4, MOV, M4A, WAV, FLAC, AAC, and OGG to MP3
- MP3 to M4A, WAV, and AAC
- Adjustable bitrate for compressed formats
- Preview audio before you download
- No sign-up and no uploads to Hemiley servers
How to Use Free Audio Converters
- Browse Audio Tools and open the tool you need (for example Video to Text or MP4 to MP3).
- Upload a supported audio or video file in your browser.
- Convert, preview the result, and download — no account required.
Looking for more utilities? Explore the full free online tools directory or jump to Image Tools.
Audio Tools FAQ
Are Hemiley audio converters free?
Yes. Every audio converter is free to use with no sign-up or subscription.
Are my files uploaded to a server?
Conversion runs in your browser after a one-time engine download. Files are not uploaded to Hemiley servers for processing.
Which formats are supported?
You can transcribe MP4, MOV, WebM, and MKV to text, convert MP4, MOV, M4A, WAV, FLAC, AAC, and OGG to MP3, and convert MP3 to M4A, WAV, or AAC.