Compress an audio file, free
Shrink an audio file right in your browser. Pick a target size or bitrate; nothing uploads and there's no signup. Smaller files also transcribe faster if you sign up.
Drop a file or click to choose
Free · no signup · runs in your browser · nothing uploads
Want a transcript of it too? Speaker labels, 21 export formats, first 30 minutes free.
Start – 30 free minutesWant a transcript of it too? Speaker labels, 21 export formats, first 30 minutes free.
Start – 30 free minutesWhy is this free? It runs entirely in your browser — we don't pay for a server to process your file, so there's nothing to gate.
Compress audio in three steps
Drop your file, pick a target size or bitrate, and download, all in your browser.
Why it stays free
The whole thing runs on your device, so we never receive the file, store it, or pay to process it. That is exactly why the tool can stay free.
Shrink a 400 MB lecture to attachment size
A 400 MB WAV recording of a lecture drops to a small fraction of that at a listening-quality bitrate, small enough to send as an email attachment. When it’s the words you’re after and not the file, transcribe it with speaker labels instead. The opening 30 minutes are free.
Frequently asked questions
Does my file upload?
No. The compression happens in your browser, so the audio is never uploaded anywhere.
Is it free?
Yes. There's no signup and no watermark on what you download.
Will it lower the quality?
Compression trades some quality for size; pick a higher bitrate to keep more quality, or a lower one for a smaller file.
Why compress before transcribing?
Smaller files send faster. Transcription quality depends on clarity, not file size, so light compression is usually fine.
Need the words? Transcribe it with 30 free minutes
A $1 hold confirms your card and releases immediately — you're never charged, and 30 free minutes land right away.
Start – 30 free minutes