Pixel Space

Audio Converter

Convert MP3, WAV, M4A, FLAC, and other common audio formats online with batch processing and ZIP downloads. Audio stays in your browser.

How to use

Convert MP3, WAV, M4A, FLAC, and other common audio formats online with batch processing and ZIP downloads. Audio stays in your browser.

Steps

  1. Add one or more local audio files by dropping or choosing them. Use Audio Extractor for video files.
  2. Choose an output format. MP3 and M4A also let you set the bitrate, sample rate, and channels.
  3. Select Start conversion. The processing engine loads on first use, so keep the page open.
  4. Download each result separately or package all results as a ZIP.

Supported formats

Input common MP3, WAV, M4A/AAC, FLAC, OGG, and Opus audio. Export MP3, M4A, WAV, or FLAC. WAV uses 16-bit PCM and FLAC uses lossless compression; multiple results can be packaged as a ZIP.

Files and privacy

Audio reading, decoding, conversion, and ZIP packaging run in your current browser. Files are not uploaded to a server. The processing engine may download its program files on first use.

Limitations

  • Up to 500 MB per audio file and 20 files per batch. Actual limits depend on device memory and browser support.
  • Container and codec support depends on the browser and FFmpeg. Encrypted, DRM-protected, or damaged files cannot be processed.
  • WAV is uncompressed and typically uses 5-12 MB per minute depending on sample rate and channels. Leave enough memory for long audio.
  • Lossy-to-lossy conversion re-encodes the audio and may reduce quality. Converting to the same format also re-encodes; original files are not replaced automatically.
  • For audio with multiple tracks, the first track is used. Surround sources such as 5.1 can be downmixed to stereo.
  • Compatible metadata is kept by default, but cover art, chapters, and other extras are not guaranteed to survive.

Frequently asked questions

Is my audio uploaded?

No. Audio reading, conversion, and ZIP packaging run locally in your browser. Only processing engine resources may be downloaded on first use.

Which input and output formats are supported?

Common inputs include MP3, WAV, M4A/AAC, FLAC, OGG, and Opus. Output can be MP3, M4A, WAV, or FLAC. Actual support still depends on the source codec.

Why are WAV files so large?

WAV stores uncompressed PCM audio, so it is usually much larger than MP3, M4A, and FLAC. Choose MP3, M4A, or FLAC when size matters.

Which format should I choose?

MP3 has the widest compatibility. M4A uses AAC and usually produces smaller files. WAV is lossless and largest. FLAC is lossless compression and suits archiving.

Does same-format conversion reduce quality?

The audio is re-encoded. Lossy-to-lossy operations such as MP3 to MP3 or M4A to M4A may reduce quality further, so keep the original file.

What should I do if conversion fails?

Check that the file plays normally and has no DRM protection. If memory is insufficient, shorten the audio, lower the sample rate, or process fewer files at once.

Can it convert video files?

This tool accepts audio files only. Use Audio Extractor to extract an audio track from a video.