WAV Compressor

How it works

How to compress a WAV file

Pick the method that fits where the file is going.

1
Add WAV files
Drop one or more WAV files (or any other audio) onto the page.
2
Choose a method
Lossless FLAC, a smaller WAV, or MP3 / M4A / Opus. Each file shows the expected size.
3
Compress & download
Listen to the result, then download each file or everything as a ZIP.

Why ToolCMB

Shrink WAV files the right way

Lossless or lossy — you decide.

Lossless FLAC

Identical sound, about half the size. FLAC plays in all modern players and DAWs.

Smaller WAV

Keep the .wav format but lower the sample rate, bit depth or switch to mono.

Up to 90 % smaller

MP3, M4A (AAC) or Opus for sharing, email and the web.

Size preview

See the estimated result size of every file before you start.

Great for voice

Interviews, lectures and voice notes shrink dramatically as mono MP3.

Batch

Compress whole folders of recordings at once and download a ZIP.

Private

Processing happens in your browser — nothing is uploaded.

Free

No watermark, no sign-up, no limits.

Why WAV files are so big — and how to shrink them

A WAV file stores audio uncompressed: every second of CD-quality stereo (44.1 kHz, 16-bit) takes 176 KB, so one minute is about 10 MB and a 24-bit/96 kHz recording is more than three times bigger.

FLAC compresses the same samples like a ZIP file — nothing is lost, and the file is typically 40–60 % smaller. If an app or device insists on WAV, a smaller WAV with a lower sample rate (22.05 kHz for voice), 16-bit depth or mono can still cut the size by 75 % or more.

For sharing, MP3, M4A or Opus are the most practical: a 50 MB WAV song becomes a 5 MB MP3 at 192 kbps with virtually no audible difference.

Size of 1 minute of stereo audio

Format	Size	Quality
WAV 24-bit / 96 kHz	34.6 MB	Studio master
WAV 16-bit / 44.1 kHz	10.1 MB	CD quality
FLAC (from CD quality)	≈ 5–6 MB	Lossless
WAV 16-bit / 22 kHz mono	2.5 MB	Voice
MP3 192 kbps	1.4 MB	Excellent
Opus 96 kbps	0.7 MB	Very good

Tips

Want MP3 directly? Use WAV to MP3 with bitrate presets.
Stereo recording of a single voice? Stereo to Mono halves the size of a WAV.
Cut out silence first with the Silence Remover.
Calculate sizes for any bitrate and duration with the Audio Bitrate Calculator.

FAQ

Frequently asked questions

Can’t find your answer? Contact us — we reply quickly.

How can I compress a WAV file without losing quality?

Choose FLAC. It is a lossless format: the decoded audio is bit-for-bit identical to the WAV, but the file is about half the size.

How do I make a WAV file smaller but keep it as WAV?

Choose “WAV” and lower the sample rate (e.g. 22.05 kHz for speech), keep 16-bit and switch to mono under More options.

How much smaller does a WAV get as MP3?

About 85–90 %. A 10 MB minute of CD audio becomes 1.4 MB at 192 kbps or 0.96 MB at 128 kbps.

Are my files uploaded?

No. All compression happens in your browser; your recordings stay on your device.

Does it support 24-bit and 32-bit float WAV?

Yes. 24-bit WAVs can be stored as 24-bit FLAC (lossless) or converted to any other format.

Is there a limit?

No artificial limits. Up to 100 files per batch; very large files depend on your device’s memory.