Free online PART to WAV converter

What the PART format is

.part is a temporary filename used by download programs to store data before a download finishes. Mozilla Firefox and some download managers create .part files; peer-to-peer applications such as eMule may also use PART files together with metadata files. The extension does not identify an audio codec or a standardized media container, so a PART file has no universal conversion method.

A PART file may contain the beginning or a portion of a WAV download, but it may also contain an entirely different file type. The original download URL, the program that created the file, and any accompanying metadata are needed to determine its intended format.

What the WAV format is

WAV is an audio container commonly used for uncompressed PCM recordings. It is supported by audio editors, media players, operating systems, recording equipment, and video-production software.

WAV preserves the source samples without lossy compression when it contains PCM audio, making it suitable for editing and archiving. Its main disadvantage is size: CD-quality stereo PCM audio at 44.1 kHz and 16-bit uses about 10 MB per minute.

How to actually convert PART to WAV

1. Finish the download first. Reopen the original download page or the download manager, resume the transfer, and wait until the temporary .part file is replaced by its final filename. If the download was cancelled, the server may not support resuming; restart it from the original source.
2. Check the completed file's real type. Do not rename an arbitrary PART file to .wav. A valid RIFF WAV normally begins with the identifiers RIFF and WAVE. On systems with FFmpeg installed, run ffprobe completed-file.
3. Rename only when the data is already WAV audio. If the download is complete and the file has a WAV signature but still ends in .part, rename it to a suitable filename such as recording.wav. Renaming changes only the filename, so it is not a conversion.
4. Convert a different completed audio format with FFmpeg. For example, use ffmpeg -i input.mp3 output.wav. To explicitly produce uncompressed PCM, use ffmpeg -i input.mp3 -c:a pcm_s16le output.wav. Replace input.mp3 with the actual completed file type; an incomplete PART file will usually produce an error or truncated output.
5. Use the built-in online converter if the file is complete. You can convert the completed audio file for free on the 101convert.com website without installing software. Uploading an unfinished PART file cannot reconstruct missing download data.

Quality and compatibility limitations

Conversion cannot restore bytes that were never downloaded. A partially downloaded WAV may appear playable but end abruptly, have an incorrect duration, or fail validation; obtain the complete source instead of converting it.

Converting compressed audio such as MP3 to WAV removes no additional information from the source, but it also does not improve its quality. Choose the required sample rate and bit depth only when the target application specifies them; otherwise, preserve the source parameters.