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WorkinTool Online Audio Converter

Want to convert Apple's proprietary file format M4A to a more compatible MP3 file? Search for a way to reduce AAC file size? Eager to make a less-known audio format compatible with more operating systems and devices? Use our online audio converter!
Completely FREE with no ads
Batch processing
Multiple formats supported
Four audio files at a time, up to 20M.
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Select file or drop file here
Your files are secure

How to Convert Audio Files Online?

Step 1
Upload your audio files to this page.
Step 2
Select an output format and start converting.
Step 3
Download the converted files to your local devices.

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Easily Change Audio Format for Free

MP3 is the most frequently-used audio format in our daily life. It can be opened on nearly all devices. Each audio format has its pros and cons. For example, MP3 occupies less storage but may be slightly inferior in sound quality compared with AAC. Sometimes we need to change audio format based on different purposes.
WorkinTool online audio converter comes at the right place. This audio file converter is capable of converting any popular audio format. You can effortlessly change the song, sound, music, and audio recording formats in seconds.
Supported input formats: MP3, MAV, M4A, WMA, AAC, FLAC, AC3, M4R, APE, OGG
Supported output formats: MP3, M4A, WMA, FLAC, AC3, OGG
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Why You Can't Miss This Online Audio Converter

Bulk Conversion
Bulk Conversion
You can upload four audio files to this sound converter and get multiple tasks done simultaneously. It is very time-saving.
Free without Ads
Free without Ads
No ads, registration requirements, or paid conversions. You can use this sound file converter entirely free.
All Platforms Supported
All Platforms Supported
You can visit WorkinTool online audio converter anytime on any device. It doesn't matter if you use Mac, Windows, Linux, Android, or iPhone.
Easy and Quick
Easy and Quick
This free audio converter has a simple and intuitive interface. You just need to upload files, select a format for converting, and download your files.
Security Matters
Security Matters
We promise that your audio file data is 100% protected. Nobody except you can access the files you uploaded.
Desktop Alternative
Desktop Alternative
Our desktop converter software presents more features except for audio conversion. It is also a video-to-audio converter, MP3 converter, video converter, audio recorder, and audio-to-text converter.

Desktop Software VS Online Tool

Desktop Software
Free Download For Win 11/10/8/7
No file size limitation
Data privacy and information security are ensured
Faster converting speed and better outcome quality
No ads involved
Convert audio to MP3 in batch without quantity limitation
Integrated features like video to audio, audio recording, audio to text, text to audio, etc.
Only available for Windows
Online Tool
Explore Now
No need to install software, access everywhere with the Internet
Stable converting speed and high exporting quality
No backup for uploaded files; security is guaranteed
No ads involved
Longer uploading and downloading time
The file size is up to 20M

WorkinTool Audio Converter

Start Your Free Plan!
Want to discover more features related to audio conversion? Download our Windows audio converter software, where you can convert audio to MP3 and AAC without quality loss. It also supports batch converting audio to MP3. More features, like audio to text, audio to MP4, and audio recording, are free to use as well. Join our free plan immediately!
Free Download For Win 11/10/8/7
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