Convert audio to MP3 or WAV in your browser. It also pulls the soundtrack out of MP4 and WebM videos — handy for turning a recorded lecture or meeting into something you can listen to on the go.
How to convert audio
- Choose the output: MP3 (small, plays everywhere) or WAV (lossless, large).
- For MP3, pick a bitrate. Set the sample rate and stereo/mono.
- Drop in your files — several at once is fine.
- Save each result, or Download all as .zip.
Which input formats work?
Anything your browser can decode. In Chrome and Edge that includes MP3, WAV, OGG, Opus, FLAC, M4A/AAC, WebM and audio inside MP4. Safari and Firefox support slightly fewer. WMA and some AC-3 tracks in videos aren't supported by browsers.
Choosing a bitrate
| Bitrate | Good for |
|---|---|
| 96 kbps | Speech, podcasts, voice memos (use mono) |
| 128 kbps | Casual listening, audiobooks |
| 192 kbps | Music — most people can't tell it from CD |
| 320 kbps | Maximum MP3 quality, archiving music |
Converting an MP3 to a higher bitrate doesn't improve it — you can't restore detail that was already discarded. Always convert from the best source you have.
Mono for speech
Recordings of one voice (lectures, interviews, voice notes) gain nothing from stereo. Choosing mono halves the file size at the same quality.
Converting a whole music library
The browser version handles a handful of files at a time. Audio Fix Batch Converter for Windows converts entire folders recursively to MP3, WAV, FLAC, AAC, OGG or WMA — several formats in one pass — with bitrate control and a built-in preview player. Need the words from a recording rather than the audio? Whispering Notes AI transcribes audio and video to text offline.
More audio, speech & subtitles
- SRT to VTT Converter & Subtitle Sync FixerConvert subtitles between SRT and WebVTT, shift timing earlier or later, fix frame-rate drift, or extract a plain-text transcript. Free and processed in your browser.
- Text to Speech OnlinePaste any text and hear it read aloud with your device's voices. Adjust speed and pitch, follow along with word highlighting. Free, no sign-up, nothing sent to a server.
- Base64 Encoder & DecoderEncode text to Base64 or decode Base64 back to text, right in your browser. Handles emoji and accented characters correctly, with URL-safe output.
- HTML Entity Encoder & DecoderEscape HTML so tags display as text, or decode entities back into characters. Supports all HTML5 named entities, in your browser.