WAV Compressor
Reduce WAV size by lowering bit depth and sample rate. For dramatic savings, convert to MP3 instead.
Drop or click to select (wav)
First run downloads ~30MB ffmpeg engine; subsequent runs are instant. Everything stays in your browser.
About this tool
WAV is an uncompressed audio format, which makes it perfect for editing and archiving but very inefficient for sharing. A three-minute song in WAV is roughly 30 MB; the same song as a 192-kbps MP3 is about 4 MB with no audible difference for casual listening.
This WAV Compressor lets you shrink WAV files in two ways: either re-encode to a lossy format like MP3/AAC (massive savings), or stay in WAV but lower the bitrate and sample rate. All of this happens in your browser through ffmpeg.wasm — your audio never leaves your device.
For raw recordings you want to edit later, keep an uncompressed master and compress only the export you're sharing.
Why use it
- Runs locally in your browser — your audio never uploads.
- Powered by ffmpeg.wasm for professional-grade re-encoding.
- Target a specific file size in MB.
- Free, unlimited, no watermark, no signup.
How to use it
- 1Upload your WAV file
Drop the .wav file or pick it from your device.
- 2Choose quality or target size
Lower bitrates and sample rates yield smaller files. Or set the target MB directly and let the tool figure out the math.
- 3Download the smaller audio
The original WAV stays untouched on your disk.
Common use cases
- Trimming voice memo and field recording sizes.
- Preparing studio recordings for client previews.
- Reducing podcast raw recordings before backup.
- Sharing music demos without sending massive masters.
- Compressing sound design assets for game projects.
Tips for best results
Spotify Free, YouTube, and most podcast apps stream at 128 kbps. Going much higher rarely makes a noticeable difference on phone speakers or earbuds.
Spoken-word audio sounds fine at 22 kHz mono, halving the file again on top of bitrate savings.
If you're archiving a music master, keep the original WAV. Re-compressing a compressed file always degrades it.