WAV to MP3 Converter

How to Convert WAV to MP3 Online

1. Upload Your WAV Files: Click "+ Add Files" or drag WAV files into the page. Batch is supported — convert an entire album or recording session in one pass.
2. Pick a Quality Preset or Custom Bitrate: Default is the Quality Preset dropdown (Highest, Very High, High, Medium, Low, Very Low, Lowest). For finer control switch to Custom Bitrate and choose Constant Bitrate (e.g. 320, 256, 192, 128 kbps) or Variable Bitrate (e.g. 220–260, 170–210, 100–130 kbps). Optionally set a Specific file size target instead.
3. Adjust Channel, Sample Rate, or Trim (Optional): Audio Channel defaults to Original — pick Mono to halve the bitrate for voice. Audio Sample Rate also defaults to Original; downsample to 44.1 kHz or 22.05 kHz if your source is oversampled. Trim lets you set start and duration to clip out silence or unused sections.
4. Convert and Download: Click Convert. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared. Download individually or grab everything as a ZIP.

Why Convert WAV to MP3?

WAV is uncompressed PCM — about 10 MB per minute for stereo 16-bit/44.1 kHz CD-quality audio, and roughly 30 MB per minute for 24-bit/96 kHz studio masters. MP3 typically shrinks that 8–12× while staying transparent to most ears at 192 kbps and above. Encoding uses the LAME library, the de facto reference open-source MP3 encoder maintained since 1998.

• Shrink masters for distribution — A 4-minute 16-bit/44.1 kHz WAV is 42 MB. The same track at LAME V2 (190 kbps VBR) is ~5.7 MB; at 320 kbps CBR it's ~9.4 MB. A 50-track album drops from ~2 GB to ~300 MB.
• Email, Discord, and messaging caps — Gmail attachments cap at 25 MB; Discord's free tier cap is 10 MB (since September 2024); WhatsApp documents cap at 100 MB. A multi-minute WAV blows past all three; a 192 kbps MP3 fits with room to spare.
• Podcast hosting — Apple Podcasts recommends 128–256 kbps MP3 stereo (or 64–128 kbps mono) at 44.1/48 kHz. Spotify for Creators accepts WAV but transcodes to Ogg Vorbis 96–160 kbps for playback, so uploading MP3 at 192 kbps avoids double-lossy artifacts while keeping the file portable.
• Universal playback — Every car stereo, Bluetooth speaker, smart TV, in-flight system, and budget MP3 player from the past 20 years decodes MP3. WAV support is patchy on older hardware and streaming dongles.
• Phone storage and cellular data — A 12 GB lossless WAV library streamed over LTE burns ~1 GB per hour; the same library re-encoded at 192 kbps MP3 streams at ~85 MB per hour.
• DAW renders and field recordings — After mixing in Audacity, Reaper, Logic, or Ableton, export the master to WAV and re-encode that single file to MP3 here for sharing. Keep the WAV as your archival master.

WAV vs MP3 — Format Comparison

Bitrate & Encoder Mode Cheat Sheet

CBR (constant) holds the bitrate steady — predictable file sizes, slight quality compromise on complex passages. VBR (variable) lets the encoder spend more bits on transients and complex sections and fewer on silence; for the same average bitrate it usually sounds better, but file sizes vary. ABR (average) sits between the two and is rarely the right pick when VBR is available.

Frequently Asked Questions

Does converting WAV to MP3 lose audio quality?

Yes — MP3 is lossy. The encoder removes spectral content that psychoacoustic models predict is masked or inaudible. At 192 kbps VBR and above, most listeners cannot reliably tell MP3 from the WAV original in double-blind ABX tests; below 128 kbps stereo, artifacts (cymbal smearing, pre-echo, swirly highs) become audible on good headphones. Always keep your WAV as the master — you can re-encode at a higher bitrate later, but you cannot recover bits MP3 discarded.

Should I pick 320 kbps CBR or LAME V0 VBR?

For pure quality at the smallest size, V0 wins — it averages around 245 kbps but spends bits adaptively, so dense passages get more headroom than a 320 kbps CBR would waste on near-silence. Pick 320 CBR only when you need a predictable file size (radio delivery, fixed-rate streaming uploads) or when the player has historically had bugs with VBR seek tables (very old in-car CD-MP3 players from the early 2000s). For everything else built in the last 15 years, V0 or V2 VBR is the better choice.

What bitrate do Apple Podcasts and Spotify want?

Apple Podcasts recommends 128–256 kbps stereo MP3 at 44.1 or 48 kHz, or 64–128 kbps for mono spoken word, with loudness around −16 LUFS and a true-peak ceiling of −1 dBFS. Spotify for Creators accepts MP3 but prefers a WAV or FLAC master at 44.1 kHz / 16-bit minimum and re-encodes internally to Ogg Vorbis at 96–160 kbps. If you only ship MP3, 192 kbps stereo VBR (LAME V2) hits both platforms cleanly.

Will my ID3 tags, album art, and metadata transfer?

WAV's metadata story is messy — most WAV files store little or nothing, and what they do store (RIFF INFO chunks) is not standardized across DAWs. The XConvert encoder writes ID3v2 tags into the MP3 and carries over whatever it can read from the WAV header. In practice, expect to add or fix artist / album / title / album-art after conversion using a tag editor like Mp3tag, Picard, or your music app's built-in editor.

Can I convert a 24-bit / 96 kHz studio master directly to MP3?

Yes, but MP3 internally tops out at 48 kHz and 16-bit precision, so the encoder downsamples on the way in. For best results, render or pre-convert your master to 16-bit / 44.1 kHz with proper dither in your DAW before encoding — that way you control the resampling quality instead of leaving it to the encoder defaults. For lossless archival of a 24/96 master, convert WAV to FLAC instead.

How do I shrink a WAV podcast episode below the 25 MB Gmail limit?

A 60-minute stereo podcast WAV is ~600 MB. Encode to mono 96 kbps MP3 (Apple Podcasts' mono minimum) and the same hour drops to ~43 MB; mono 64 kbps drops it to ~29 MB; mono 48 kbps gets you under 25 MB at the cost of audible warble on music beds. For voice-only content, mono 64–96 kbps is usually indistinguishable from higher bitrates on phone playback.

Can I trim the WAV before converting, or do I need a separate tool?

Trim is built into Advanced Options — set a start time and a duration to crop the leading countdown, dead air, or unused tails before encoding. For more involved edits (cutting multiple sections, splitting into chapters) use the dedicated audio cutter and feed the resulting WAVs back through this tool.

Is my audio uploaded to your servers, and what's the file-size cap?

Files are sent to the conversion backend, processed, and made available for download on the same session — they are not stored or indexed afterwards. There's no per-file count limit and no watermark. If you need the reverse direction (decompressing MP3 back to WAV for editing), use MP3 to WAV; for shrinking already-encoded MP3s without re-uploading WAV masters, use compress MP3. To reduce audio file size across other formats too, the general-purpose audio compressor handles the same job.