05 / CONVERT
MP3 to WAV Converter
Convert MP3 to uncompressed 16-bit PCM WAV on your device. Compare the larger file size, preview the result and download without uploading audio.
Your audio stays on your device. No server upload.
Adjust the settings and compare the actual result.
Each tool lists its supported formats and limits.
Convert an MP3 for a WAV workflow
Use this converter when an editor or delivery workflow needs a WAV file. It decodes your MP3 and writes uncompressed 16-bit PCM audio. The file is processed in your browser, with no account or audio upload. Keep your original MP3: a WAV copy is useful for compatibility, but cannot recover detail removed during MP3 encoding.
How to convert MP3 to WAV
- Choose an MP3 from your device, up to 30 MiB and ten minutes.
- Review the duration and estimated WAV size. WAV output is selected automatically; there is no MP3 bitrate setting.
- Optionally add a fade-out. Leave it off for a format conversion with no intentional volume change.
- Create the audio, compare the actual file sizes and play the original and result.
- Download the WAV before changing files or leaving the page.
Why is the WAV file larger?
MP3 stores compressed audio. PCM WAV stores samples directly, so file size depends on duration, sample rate, bit depth and channel count. At 48 kHz, 16-bit stereo audio uses 192,000 bytes per second before headers. A 20-second file needs about 3.66 MiB of audio data; a 192 kbps MP3 of the same length needs about 0.46 MiB before headers. These are estimates, not exact download sizes.
The result panel compares the actual input and output bytes and labels increases as larger. MiB means 1,048,576 bytes, while a decimal MB means 1,000,000 bytes. If your goal is a smaller attachment, use MP3 compression instead. The file-size guide explains bitrate and upload limits.
Output settings and limits
Output is PCM signed 16-bit WAV. A 48 kHz input stays at 48 kHz; other accepted sample rates export at 44.1 kHz. Mono stays mono and stereo stays stereo. This tool does not offer sample-rate selection, multichannel mixing or a batch queue. Basic metadata is copied where supported, but artwork and all original tags are not guaranteed to survive a format change.
The 30 MiB input limit does not limit the output to 30 MiB. A long MP3 may expand substantially, and your browser needs memory for both decoded audio and the result. Keep the tab open during processing and try a shorter file if your device runs out of memory. See help and troubleshooting.
MP3 to WAV questions
Does converting to WAV improve sound quality?
No. The larger file stores the decoded MP3 sound, including any losses already present. For an original lossless master, use the original recording rather than converting an MP3.
Is WAV conversion lossless?
The output is uncompressed, but that does not make the MP3 source lossless. Resampling and conversion to 16-bit PCM can also change sample values. Do not use this tool when you need bit-identical archival preservation.
Can I convert WAV back to MP3?
Yes, use WAV to MP3. For repeated comparisons, always start from your original file instead of repeatedly converting between formats. See the MP3 bitrate guide for delivery choices.
Browse all audio tools · Read the audio guides
For the full workflow and export checks, read the MP3 to WAV guide.