- Is my audio uploaded anywhere?
- No. The conversion runs inside your browser tab. The page reads the WAV from your disk in small pieces, decodes it, and encodes the MP3 on your device. That matters for unreleased music, client recordings, and interviews you promised to keep private — and it means there's no upload wait. You can open your browser's network tab while it runs and watch: the audio isn't sent to any server.
- Which bitrate should I pick?
- It depends on what's in the file. For speech — voice memos, lectures, interviews, podcasts — 128 kbps is plenty. For music, 192 kbps is the point where most listeners can't tell the MP3 from the original on everyday headphones. Pick 320 kbps for masters you're sending to someone who'll listen closely, or when file size doesn't matter. Unlike converting from a video, a WAV is lossless, so a higher bitrate here genuinely keeps more of the original detail.
- How much smaller will the MP3 be?
- A WAV's size depends on its sample rate, bit depth, and channels; an MP3's size depends only on bitrate and length. CD-quality WAV (44.1 kHz, 16-bit, stereo) is 1,411 kbps, so a 192 kbps MP3 is about 86% smaller and a 128 kbps MP3 about 91% smaller. Studio WAVs at 96 kHz / 24-bit stereo are 4,608 kbps, so a 192 kbps MP3 of one is over 95% smaller. Each minute of MP3 takes about 0.9 MB at 128 kbps, 1.4 MB at 192 kbps, and 2.3 MB at 320 kbps. The tool shows the exact estimate and the percentage before you click Convert.
- Why would the MP3 be bigger than my WAV?
- Because some WAVs are already small. Phone systems, answering machines, and old dictation devices record at 8 kHz mono in 8-bit, which is only 64 kbps — less than even the lowest quality this tool offers. Converting that to a 128 kbps MP3 doubles the size without adding anything you can hear. The tool warns you when this happens. For recordings like that, keeping the WAV is usually the better choice.
- Does converting to MP3 lose quality?
- Yes, a little — MP3 is a lossy format, so it throws away sound the ear is least likely to notice. At 192 kbps and above, that loss is very hard to hear for most music. It's a one-way trip, though: turning the MP3 back into a WAV won't restore what was removed. Keep your original WAV if you might edit, remix, or master the recording later, and use the MP3 for sharing and listening.
- What happens to 24-bit, 96 kHz, or surround WAVs?
- They all convert. MP3 doesn't store bit depth, so 24-bit and 32-bit float audio is encoded directly without a separate step. MP3 carries 32, 44.1, or 48 kHz, so 44.1 and 48 kHz files keep their rate, 96 and 192 kHz files come down to 48 kHz, and unusual rates like 22.05 kHz or 8 kHz are converted to 44.1 kHz. MP3 also only holds mono or stereo: mono stays mono (which keeps the file smaller), and 5.1 or 7.1 WAVs are mixed down to stereo.
- What's the biggest WAV I can convert?
- Up to 4 GB and 3 hours per file. 4 GB is also the most a standard WAV can hold, and it fits 3 hours of 48 kHz / 24-bit stereo. The 3-hour limit exists because the finished MP3 stays in your browser's memory until you download it. For longer recordings — an all-day conference or a live set — split the WAV into parts in your audio editor first. On phones and older laptops, closing other tabs helps big files convert faster.
- It says my WAV is in a compressed format. What does that mean?
- Most WAVs store plain PCM audio, which this tool reads directly. A few devices and older programs write WAVs that contain compressed audio instead, such as IMA ADPCM or GSM — common on voice recorders and some game sound files. The browser can't decode those. Phone-system WAVs in μ-law or A-law work in most current browsers, but not every one. Open the file in an audio editor like Audacity and export it as a standard 16-bit PCM WAV, then drop the new file in.
