WAV to MP3 — Compress Audio Free
Convert WAV files to MP3 online for free. Reduce file size dramatically while retaining excellent audio quality. Choose bitrate from 128 to 320 kbps. Supports WAV, AIFF, and PCM input. No signup, no watermark, instant download.
Drop your WAV file here
WAV · AIFF · PCM
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Duration: —
Conversion Settings
No account required · Files deleted in 24h
Converting to MP3…
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Pro — batch conversion, VBR encoding, ID3 tag editor, 500 MB file limit, API
API access · Priority queue · Team workspace
How It Works
Upload Your WAV
Upload a WAV, AIFF, or PCM audio file. The tool reads the file metadata and displays the duration and sample rate so you can verify it before converting. WAV files are typically 10–20× larger than MP3 at equivalent quality, making conversion worthwhile for sharing or streaming. Files up to 50 MB are accepted on the free tier.
Choose Settings
Select the MP3 bitrate from 128 kbps (smallest file, good quality) to 320 kbps (largest file, best quality). 192 kbps is the recommended sweet spot for most uses — transparent audio quality indistinguishable from the original for most listeners, at about 8% the WAV file size. Also choose stereo or mono output.
Download MP3
Download the converted MP3 instantly. The file is universally compatible with phones, cars, music players, streaming platforms, and video editors. The original WAV quality is faithfully encoded at your chosen bitrate — no additional compression artifacts beyond the standard MP3 encoding process are introduced.
WAV to MP3 Features
Bitrate Control
Choose from 128, 192, 256, or 320 kbps. Higher bitrates produce better audio quality at larger file sizes. 128 kbps is ideal for voice recordings and speech. 192–256 kbps is excellent for music. 320 kbps is the highest standard MP3 bitrate and is virtually indistinguishable from lossless to most ears on consumer audio equipment.
Massive Size Reduction
A typical 50 MB WAV file at 44.1 kHz stereo becomes approximately 5 MB at 128 kbps MP3, or 8 MB at 320 kbps. This 80–90% size reduction makes files practical for email, web streaming, social media uploads, and mobile storage. MP3 is universally playable on every device without special codecs or apps.
High Fidelity Encoding
Uses LAME MP3 encoder — the gold standard for MP3 encoding quality. The psychoacoustic model carefully removes only the audio frequencies least perceptible to human hearing, preserving the musical and tonal content that matters. Joint stereo encoding at 192 kbps+ delivers excellent stereo imaging in a compact file.
Stereo & Mono Output
Keep the original stereo channels or downmix to mono. Mono output halves the bitrate needed for equivalent quality — a 128 kbps mono file sounds as good as a 192 kbps stereo file for voice and speech content. Useful for podcasts, voice recordings, phone hold music, and any content that doesn't benefit from stereo separation.
Audio Preview
Preview your WAV in the browser before converting. Confirm it's the right file, check the duration, and listen for any issues before committing to the conversion. This saves time if you accidentally uploaded the wrong file or need to verify the audio content without additional software.
Private & No Account Needed
TLS 1.3 encrypted uploads. Files permanently deleted within 24 hours. No watermarks added to audio output. No account, signup, or personal information required for the free tier. Convert your files privately without creating yet another account.
Free vs Pro
| Feature | Free | Pro |
|---|---|---|
| Files per session | 1 | 50 |
| Max file size | 50 MB | 500 MB |
| VBR encoding | — | |
| ID3 tag editor | — | |
| Batch conversion | — | |
| API access | — | |
| Watermark on output | None | None |
Frequently Asked Questions
MP3 is a lossy format so yes, some audio information is discarded during compression. However, the psychoacoustic model used by the LAME encoder selectively removes only the frequencies least audible to human hearing. At 192 kbps and above, the difference is inaudible to most people on standard headphones and speakers. At 320 kbps, even trained audio engineers struggle to identify a double-blind difference. For archival or professional audio work, retain your original WAV.
128 kbps — good for voice, podcasts, and spoken word. Noticeable compression in music at high frequencies. 192 kbps — the recommended default. Excellent for music; most listeners cannot tell the difference from lossless. 256 kbps — very high quality; preferred by audiophiles and for professional use. 320 kbps — maximum standard bitrate; essentially transparent for virtually all listeners on any equipment.
A standard 44.1 kHz, 16-bit stereo WAV uses about 10 MB per minute. At 128 kbps MP3, the same audio is roughly 1 MB per minute — a 10× reduction. At 320 kbps, it's about 2.4 MB per minute — still a 4× reduction. For a typical 3-minute song: WAV ≈ 30 MB, MP3 at 192 kbps ≈ 4.3 MB, MP3 at 320 kbps ≈ 7.2 MB.
Yes. Select "Mono" in the Channels dropdown. The stereo channels are downmixed by averaging left and right channels. This is standard practice for voice recordings, phone audio, podcasts, and any mono playback system. A mono 128 kbps MP3 sounds as good as a stereo 192 kbps MP3 for non-spatial content and is half the bitrate.
Yes. TLS 1.3 encrypted. Files are automatically deleted within 24 hours. No watermarks. No account required.