Convert MP3 to FLAC
Convert any audio file to FLAC format online for free. Fast, secure, and easy-to-use audio to FLAC converter with no software installation required.
Drag & Drop Audio File
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Max file size: 50 MBMax duration: 30 min
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How to Use MP3 → FLAC
Upload File
Drag and drop your MP3 file or click to browse. Supports files up to 1GB.
Convert
Select FLAC as your output format and click convert. Our servers will process your file instantly.
Download
Download your converted file instantly. The download link expires in 1 hour for security.
Why Choose Scriptivox MP3 to FLAC Converter?
Fast Conversion
Our powerful servers process your files quickly, delivering converted files in seconds.
100% Free
Convert your files completely free with no hidden costs or subscription fees.
Secure & Private
Your files are encrypted and automatically deleted after conversion. We never store or share your data.
No Installation
Works directly in your web browser. No software download or installation required.
MP3 vs FLAC: format comparison
How the two formats differ on the things that change your result.
| Specification | MP3 (source) | FLAC (result) |
|---|---|---|
| Container | MPEG-1/2 Audio Layer III | FLAC |
| Developed by | Fraunhofer IIS / MPEG | Xiph.Org Foundation |
| Introduced | 1993 | 2001 |
| Audio codecs | MP3 | FLAC |
| Compression | Lossy | Lossless (compressed) |
| Max sample rate | 48 kHz | 192 kHz |
| Max channels | 2 | 8 |
| Gapless playback | Partial | Yes |
| Metadata / tags | ID3v2 | Vorbis comments |
| Approx. file size | 0.96–2.4 MB per minute | 5–7 MB per minute |
| Licensing | Patents expired | Royalty-free |
| Plays natively on | Native: Web browsers, Windows, macOS, iOS, Android, Smart TVs | Native: Web browsers, Windows, macOS, iOS, Android · Needs a player: Smart TVs |
| Best for | music libraries, podcasts, sharing with anyone | long-term archiving, audiophile listening, CD ripping |
What changes when you convert MP3 to FLAC
MP3 is already lossy, so converting to FLAC cannot restore detail that the original encoder discarded. What you gain is a format that survives further editing without stacking up more loss. Expect the file to grow from roughly 1.7 MB per minute to about 6 MB per minute, around 3.6 times larger.
The two formats are aimed at different jobs. MP3 is typically used for music libraries, podcasts, sharing with anyone, while FLAC is the usual pick for long-term archiving, audiophile listening, CD ripping. That difference in intent is what most of the specification gaps above come from.
Expect metadata to be rewritten rather than copied: ID3v2 in the source becomes Vorbis comments in the result. Standard fields map cleanly; niche custom tags often do not.
About MP3 to FLAC Conversion
This page converts MP3 files, stored in the MPEG-1/2 Audio Layer III container since 1993, into FLAC, which uses FLAC and dates from 2001. The differences between the two containers decide what changes in the result.
MP3 comes from Fraunhofer IIS / MPEG and dates to 1993. It carries MP3, which is what determines the quality ceiling of anything you convert out of it.
FLAC was introduced by Xiph.Org Foundation in 2001. It carries FLAC and has native playback on 5 of six platform categories, which is the practical reason to choose it as a target.
After converting your file, you can use Scriptivox transcription services to convert your audio to text. Perfect for meetings, interviews, podcasts, and more.
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