Convert MP3 to FLAC — Free & Private

Browser-based MP3 to FLAC conversion. No registration, no limits, no waiting.

100% Private

No Upload

Works Offline

Unlimited

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About MP3 to FLAC Conversion

Transform your sound files while maintaining audio fidelity. Different formats excel at different tasks—from MP3's universal playback to FLAC's perfect preservation—and switching between them is instant.

How to Convert MP3 to FLAC

Converting files has never been easier or more secure. MixConvert uses advanced browser-based technology to process your files instantly without uploading them to a remote server. Follow these simple steps to get started:

Select Your Files: Select your MP3 files by clicking the upload zone or dragging them directly onto the page.
Choose Output Format: Confirm FLAC is set as the destination format in the format selector.
Convert Instantly: Click the convert button to begin. Your MP3 files will be processed locally in seconds.
Download: Save your new FLAC files directly to your device. Batch download available for multiple files.

MP3 to FLAC FAQ

Can I convert MP3 to FLAC on mobile devices?

Absolutely! Our converter is fully responsive and works on any smartphone or tablet. Just visit this page, upload your MP3 files, and convert them to FLAC format—no app required.

Is my data secure when converting MP3 files?

100% secure. Unlike cloud converters, MixConvert processes your MP3 files entirely on your device using WebAssembly. Your data stays on your computer—we never see it.

How large can my MP3 files be?

We don't impose file size restrictions. Your browser handles the conversion, so the limit depends on your device's memory. Typical computers can process very large MP3 files without issues.

What's the conversion speed for MP3 files?

Conversion is nearly instant for typical MP3 files. Your device's processor handles the work, so faster devices complete FLAC conversion more quickly.

Does MixConvert support converting multiple MP3 files at once?

Batch conversion is fully supported. Upload as many MP3 files as you need and convert them all to FLAC in one go. A ZIP download option makes it easy to save everything.

How do I ensure the best FLAC quality?

Our converter automatically selects high-quality encoding parameters. For FLAC specifically, we optimize settings based on the format's strengths to give you excellent audio fidelity.