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WAV to MP3

Convert bulky WAV files to compact MP3s in your browser. Choose your bitrate, batch up to four files, nothing uploaded.

Why WAV files are so big

WAV is the studio workhorse: uncompressed PCM audio at typically 44,100 samples per second × 16 bits × 2 channels, which works out to about 10 MB per minute. That fidelity is perfect for recording and editing, but terrible for sharing — email attachments bounce, messaging apps recompress anyway, and web players buffer. MP3 at 192 kbps keeps roughly 90% of the perceived quality in a tenth of the space.

How the conversion works

This page mounts the Audio converter with MP3 output. FFmpeg’s LAME encoder runs locally in your browser and converts the first audio stream of each file — nothing is uploaded. Pick a bitrate (64–320 kbps), run the batch, preview each result and download individually or as a ZIP.

Bitrate guidance

Remember MP3 is lossy: converting cannot improve quality, and re-encoding an already-compressed source only loses more. Convert from the WAV original, not from another MP3.

Other conversions

Podcast and voice workflow

Recording a podcast as WAV and publishing as MP3 is the standard pipeline: edit the lossless master, export the MP3 for distribution. At 128 kbps mono you can halve the size again for voice-only shows — most podcast hosts accept it and listeners will not notice on earbuds. Keep the WAV masters archived; you can always re-export, but you can never get quality back from an MP3.

Private by design

Audio often contains voices and personal content. Everything is processed in your browser tab — no uploads, no accounts, no watermarks.

Frequently asked questions

How much smaller is MP3 than WAV?

Roughly 10x at 128 kbps: a 50 MB WAV becomes about 5 MB. WAV stores raw PCM samples; MP3 discards what human hearing barely notices.

Which bitrate should I choose?

128 kbps is fine for voice and podcasts, 192 kbps is the sweet spot for music, 320 kbps is near-transparent for critical listening. Higher bitrate only makes bigger files — it cannot restore quality.

Will I hear a quality difference?

On decent headphones, 128 kbps can sound slightly dull next to the WAV; at 192 kbps and above most listeners cannot tell. For archiving or editing, keep the WAV.

Can I convert multiple WAVs at once?

Yes: up to 4 files per batch, 150 MiB each, 250 MiB total, with a single ZIP download.

Are my audio files uploaded?

No. FFmpeg runs on your device; only the ~32 MB engine downloads on first use.

What if a file fails?

Files without an audio track, DRM-protected or damaged files, and unusual codecs are rejected with a clear message.

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