Convert MP3 to FLAC
The fastest way to convert MPEG-1 Audio Layer III to Free Lossless Audio Codec online. Free, secure, and works on any device.
1How to convert MP3 to FLAC
Drag & drop your MP3 file into the box above.
Click "Convert" to transform it to FLAC instantly.
Save your new file to your device.
2Why use Flux Converter?
Zero Data Usage
Files are converted in your browser. No uploading means no data usage and total privacy.
Lightning Fast
Powered by WebAssembly, conversions happen instantly on your device.
No Limits
Convert as many files as you want, of any size.
Universal
Works on Windows, Mac, Linux, Android, and iOS.
3Why convert MP3 to FLAC?
Understanding the strengths and limitations of each format helps you decide when converting from MP3 to FLAC makes sense. MP3 was developed by the Fraunhofer Society in Germany and standardized in 1993. It revolutionized the music industry by making digital music distribution practical. FLAC was developed by Josh Coalson and released in 2001. It has become the preferred format for lossless audio distribution and archival.
MP3
FLACTarget
4Technical Details
| Feature | MP3 | FLAC |
|---|---|---|
| Full Name | MPEG-1 Audio Layer III | Free Lossless Audio Codec |
| MIME Type | audio/mpeg | audio/flac |
| Category | Audio | Audio |
| Use Cases | Music distribution and streaming, Podcast episodes, Audiobooks, Mobile music libraries | Audiophile music collections, Music archival and preservation, Hi-fi streaming (Tidal, Qobuz), Studio audio backup |
| Description | MP3 is a coding format for digital audio. It uses lossy data compression to reduce file size significantly while maintaining acceptable audio quality. | FLAC is an audio coding format for lossless compression of digital audio. It reduces file size without any loss of quality. |
5Frequently Asked Questions
What is the difference between MP3 and FLAC?
MP3 (MPEG-1 Audio Layer III) and FLAC (Free Lossless Audio Codec) serve different purposes. MP3 is a coding format for digital audio. It uses lossy data compression to reduce file size significantly while maintaining acceptable audio quality. On the other hand, FLAC is an audio coding format for lossless compression of digital audio. It reduces file size without any loss of quality. Converting between them lets you leverage the strengths of each format depending on your needs.
Does converting MP3 to FLAC lose quality?
This depends on the formats involved. If the target format (FLAC) uses lossy compression, some data may be discarded during conversion. However, if FLAC is lossless, your file will be preserved at full quality. Our converter uses the best available algorithms to minimize any quality difference.
Is it safe to convert files here?
ABSOLUTELY. Unlike other sites, we do NOT upload your files to a server. All processing happens locally on your device using advanced browser technologies. Your files never leave your computer.
Is this service really free?
Yes, 100% free. No hidden fees, no watermarks, and no registration required. We support ourselves through non-intrusive advertising.
When should I use MP3 instead of FLAC?
MP3 is best for: Music distribution and streaming and Podcast episodes. FLAC is better for: Audiophile music collections and Music archival and preservation. Choose whichever format best fits your workflow and compatibility requirements.
Can I convert MP3 on mobile?
Yes! Our converter works on iPhones, iPads, and Android devices. All processing happens in your browser — no app download needed.
Privacy Guarantee
Your files are yours. We do not store, view, or claim ownership of any content you convert. Processing is done entirely in your browser.