Which format is the most compatible?

MP3 plays on practically any device; M4A/AAC is common on Apple phones.

Do my files leave my computer?

No, the conversion happens in your browser.

What is the difference between MP3, AAC and OPUS?

All three compress with some loss. MP3 is the most compatible; AAC and OPUS usually give better quality at the same size, but not every older device plays them.

Both preserve the audio. FLAC takes about half the space, and WAV is accepted by more editing programs.

Can I convert several files at once?

Yes, conversion is in batches and you can download the results as a ZIP.

Do I lose quality when converting?

If the target is a lossy format, there is some loss. For an everyday ear, at medium or high quality, the difference is usually small.

Is there a size limit?

The practical limit is your device’s memory. Very long files can take longer.

Convert your audio to the format you need

Convert MP3, WAV, AAC, OGG, FLAC, M4A and OPUS, one file or in batches. Adjust the quality, trim clips and download everything at once — without leaving your browser.

Drag one or more audio files here or click to choose

MP3, WAV, AAC, OGG, FLAC, M4A or OPUS — one file or several at once

Batch queue⚡ 100% private

Most searched conversions

Each conversion has its own page, with the step by step, tips and the limits of what it does.

To MP3

WAV, M4A, FLAC, OGG, OPUS and AAC

Turn audio into MP3, the format that plays on practically any device.

Other formats

WAV, M4A and FLAC

Switch between WAV, FLAC, M4A and MP3 according to what you need.

Trim and reduce

Trim a clip or shrink the audio file.

Several audio files at once

Convert several audio files together.

Convert several audio files at once

How does the WebFaz audio converter work?

The converter turns your audio files into other formats and lets you adjust the quality or keep only a clip. You can convert one file or several at once.

1. Build your queue. Drag the audio files to the marked area or click to choose them. Use “Add more” to include other files and remove from the queue the ones you do not want to convert.

2. Choose the format. Select the output format you want. When the bitrate option is available, lower values favor small files and higher values keep more detail. Converting audio does not recover detail that was already lost in the original recording.

3. Adjust if needed. You can keep the sample rate and channels on “Auto”. To save only part of the audio, turn on “Trim clip” and enter the start and end in hours:minutes:seconds. The same range is applied to every file in the queue.

4. Convert and save. Click “Convert all” and follow the progress. When it finishes, download the results one by one or use “Download all”.

About Audio Converter

Converts audio between MP3, WAV, AAC, OGG, FLAC, M4A and OPUS, in batches, so it works with your devices and programs.

A practical example

You have 12 WAV recordings of a rehearsal, each 80 MB, and need to email them. You add all 12 files at once, choose MP3 at medium quality and convert. You download everything in a ZIP with much smaller files.

How to use it

Add one or several files.
Choose the format and the quality.
Convert.
Download them one by one or as a ZIP.

Limits and cautions

Converting from a lossy format (MP3) to another does not recover the quality that was lost.

A ferramenta em uma imagem

Os pontos de clique estão numerados. Toque na imagem para vê-la em tamanho original. As demais telas, passo a passo, estão no guia “Como funciona”.

WebFaz Audio Converter with a WAV file in the queue, the MP3, WAV, AAC, OGG, FLAC, M4A and OPUS output formats, the bitrate and the trim option. — **Audio converter: format, bitrate and trim.**
Point 1: Add more files: the queue converts several audio files at once.
Point 2: Choose the output format (MP3, WAV, AAC, OGG, FLAC, M4A or OPUS).
Point 3: If you want, trim just a section: enter the start and the end.
Point 4: Convert all generates the files in the browser.

When to use it

Shrinking recordings to send by email or a messaging app.
Making audio play on a device, car or program that does not accept the original format.
Converting music or podcasts to a single format before organizing a library.

Tips

For speech, medium-quality MP3 is already enough and keeps the file small.
Keep the original in WAV or FLAC if you might still need to edit it.
When converting in batches, check one or two files before deleting the originals.

What happens in your browser

The conversion uses your browser’s own audio features plus lightweight encoders for MP3, AAC and FLAC. The files never leave your device.

Lossy formats (MP3, AAC, OGG, OPUS) discard information the ear barely notices, to reduce the size. Lossless formats (WAV, FLAC) keep everything: FLAC is compressed, WAV is not.

Converting from a lossy format to another does not bring back quality that is already gone; each new lossy compression only tends to make the audio worse. That is why it is better to convert from the original.

Read the full guide: real-world use cases, tips and limits →

Privacy: This tool runs entirely in your browser: your files and data are not sent to any WebFaz server. Learn more.

Perguntas frequentes

Which format is the most compatible?: MP3 plays on practically any device; M4A/AAC is common on Apple phones.
Do my files leave my computer?: No, the conversion happens in your browser.
What is the difference between MP3, AAC and OPUS?: All three compress with some loss. MP3 is the most compatible; AAC and OPUS usually give better quality at the same size, but not every older device plays them.
WAV or FLAC?: Both preserve the audio. FLAC takes about half the space, and WAV is accepted by more editing programs.
Can I convert several files at once?: Yes, conversion is in batches and you can download the results as a ZIP.
Do I lose quality when converting?: If the target is a lossy format, there is some loss. For an everyday ear, at medium or high quality, the difference is usually small.
Is there a size limit?: The practical limit is your device’s memory. Very long files can take longer.