6 Best Free Audio Converter Online

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Online Audio Converter is a useful tool when you need to convert audio files from one format to another for reducing the audio file size or playing on your devices. If you don't want to burn through your savings with paid Audio Converter, free online audio converter is a perfect choice. Of course you can find as many free online audio converters as you can on the internet, but you cannot just try them one by one to find the best one. To help you with that, we've tested and evaluated the online free audio converters and listed the 6 best free audio converter online to help you on your way.

best free audio converter online

1. FileZigZag Audio Converter Online

FileZigZag is a free online audio converting service that will convert a wide range of audio formats as long as they are not less than 50MB. Besides the audio converting, it also converts video, image, documents, ebook and archive.

To convert Audio online, just add your files to FileZIGZAG, choose the "Target Format" and then click on the "Start Converting" button to proceed the converting process. Once finished, just click the download button to download the converted audio files. The download link will remain effective for 24 hours.

filezigzag online audio converter free


Output formatAAC, AC3, AIF, AIFC, AIFF, AMR, AU, FLAC, M4A, M4R, MP3, MMF, OPUS, OGG, RA, and WAV

After learning the general information of this free online audio converter, let's see its pros and cons.


1. Convert a wide variety of file formats.

2. Support batch conversion. But you cannot convert more than 50 files a time.

3. You don't have to sign in to use this service.


1. Each uploaded file cannot be over 50MB.

2. For public and unregistered users, you can only convert 10 files per day. If you want to convert more, you need to pay for its subscription plan.

3. You need to upload the file to the website before conversion. So good internet connection is needed.

4. It only converts DRM-free audio files.

Although FileZigZag has some limitations, but you don't have to sign in to use this service and it supports almost all the common audio formats which can win many users.

2. Online Audio Converter

Different from other free online audio converters, Online Audio Converter focus more on Audio files and comes with more audio related features, like extracting audio from a video, customizing the quality, bitrate, number of channels and so on.

There are clear steps on the web page to show you how to use Online Audio Converter.

Step 1. Add files from local computer storage, Google Drive, Dropbox or just paste the url of your audio file.

Step 2. Choose the output format and set the quality of your converted file.

Step 3. Click on “Convert” button to start the conversion. Once finished, click on the “Download” get your converted files.

online audio converter free

Input format It claims that the online audio converter works with more than 300 audio and video format, but doesn’t list them all on its website.

Output format mp3, wav, m4a, flac, ogg, amr, mp2, and m4r


1. It can convert more than 300 different file formats, including drm-protected audible files.

2. It allows you to configure the quality, bitrate, frequency, and number of channels, apply reverse playback or fade in, or even remove a voice from the audio track.

3. It can convert audio files in a batch, saving them in a zip archive to speed up your downloading.

4. It allows you to edit the metadata of your audio file before converting.


1. Its supported output formats are not as many as other online converters.

2. You are not always guarantee to convert the drm-protect audible files successfully.

The biggest advantage of Online-audio-converter is that it can convert drm-protected audible file. But it only converts audible aa format, not audible aax format.

3. Aconvert Audio Converter Online

Aconvert audio converter is also a free online audio converter. With a delightfully accessible and easy-to-use interface, it can convert the uploaded audio files to another format with ease.

To convert audio files, just choose file from your local computer, online, Google Drive or Drop box storage, then select “Target format”, “Audio bitrate” and “Sample rate”, finally click “Convert now!” to start the conversion. Scroll down to find the converted audio files and click the “Download” icon to get your converted files.

aconvert audio converter online

Input format OGG, OPUS, WAV, MP4, M4A MP3 etc.

Output format WAV, WMA, MP3, OGG, AAC, AU, FLAC, M4A, MKA, AIFF, OPUS or RA


1. Its conversion speed is fast.

2. It allows you to convert files from different locations, online or local storage.

3. It allows you to change the audio bitrate and sample rate.

4. Video and audio file size can be up to 200M.


1. It only converts DRM-free audio files.

2. Changing audio bitrate option may cause the conversion failure.

3. It doesn’t support batch conversion.

Aconvert audio converter can convert the most common audio format for free with changing the bitrate settings. If you have multiple files to convert, you need to upload them one by one for converting, it is sort of wasting time.

4. Zamar Free Online Audio Converter

Zamzar is a universal online converter which not only converts audio files but audible images, documents and video. It supports 1100+ formats.

Since it is a handy tool, you just add files or select the link of your audio file, choose the output format and click on “Convert Now”. Then what you do next is to wait for your converted file.

zamzar audio converter online

Input format It supports 1200+ file formats.

Output format GP, AAC, FLAC, IMY, M4A, MID, MP3, MP4, MXMF, OTA, XMF, RTTTL, RTX, and WAV


1. Its conversion speed is fast.

2. It supports a wide range of audio file formats

3. The interface is simple but handy.


1. It only converts drm-free file.

2. The maximum file size is 50MB.

3. It doesn’t support batch conversion.

Zamzar is a quick and easy to use online audio converter which can handle a wide range of audio formats. Although you cannot upload large size file for converting, but if you just need a simple online converter, it is well worth checking out.

5. Convertio.co

Another user-friendly online audio converter is Convertio.co audio converter online. It allows you to convert the audio files up to 100MB to any of the common audio formats within a few minutes without registration. If you want to convert large file, you need to sign up at first.

To convert audio files, you can upload a file from your device, Google Drive, Dropbox or by pasting a URL, select the output format and then click on “Convert”.

convertio audio converter online

Input format Ir supports any audio formats online.



1. Convert Audio files in different audio formats.

2. Conversion speed is fast.

3. Convert local audio files and ones located online.


1. Editing metadata and changing the audio quality is not available.

2. The audio file is limited to 100MB.

3. DRM-protected audio files are not supported.

6. Best Alternative to Online Audio Converter—Epubor Audible Converter

After reviewing the free online audio converter, nearly 99% free online audio converter doesn’t support the drm-protected audio files. As an audiobook lover, I have many audible audiobooks are waiting for converting. Then I dig deeper and find the best alternative to online audible converter — Epubor Audible Converter.

Download the tool for free:

Special features of Epubor Audible Converter

1 Convert Audible AA/AAX to MP3/M4B format

2 60X faster conversion speed

3 Split Audible into chapters

4 Edit the metadata of Audible files

5 100% original quality preserved after the conversion

Detailed guide please read The official Guide to Convert Audible to MP3

convert audible into mp3 with chapters

Now no matter your audio files are drm-free or drm-protected, you’ll find the best solution to convert your audible file to any format online or offline.

Download Epubor Audible Converter for free:

joined Epubor since 2017. She always wants to share everything related to ebook reading and improve your reading journey.

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