Drag and drop an audio file or click to select it. Supports MP3, WAV, FLAC, OGG, and AAC formats.
Select a bitrate preset from low (podcast quality) to maximum. Lower bitrates produce smaller files with reduced audio quality.
Click compress and download the smaller MP3 file. The estimated size reduction is shown before you compress.
Your audio files never leave your device. All compression happens in your browser — no server uploads.
No registration, no file limits, no watermarks. Compress as many audio files as you need, completely free.
Fine-tune the quality vs. size trade-off by selecting from six bitrate presets, from voice-quality 32 kbps up to 320 kbps.
Reduce podcast episode sizes before uploading to a hosting platform to save storage and bandwidth.
Compress voice recordings or interviews to share easily by email or messaging apps.
Shrink background music tracks for web projects where loading time matters.
Free up storage space on your device by compressing large FLAC or WAV music collections to smaller MP3 files.
| Format | Description | Best For |
|---|---|---|
| MP3 | Compressed lossy audio | Music, podcasts, general sharing |
| WAV | Uncompressed lossless audio | Professional editing, studio work |
| FLAC | Compressed lossless audio | Archival, audiophile listening |
| AAC | Advanced lossy audio | Streaming, mobile playback |
For voice and podcast content, 64–96 kbps is often indistinguishable from higher bitrates.
For music, 128 kbps is generally considered the minimum for acceptable quality; 192 kbps is standard.
If you need the smallest possible file for voice memos, try 32 kbps first — it is tuned for speech.
After compressing, use Convert Audio if you need a format other than MP3.
FyleTools uses FFmpeg compiled to WebAssembly (WASM) to compress audio entirely in your browser. When you select a bitrate and click compress, FFmpeg re-encodes your audio locally using the libmp3lame encoder, producing a smaller MP3 file without sending any data to a server.