MP3 to FLAC
Upload a MP3 file and download it as FLAC. Free to start.
- Sent over HTTPS · link expires in 24 h
What changes
MP3 and FLAC side by side: quality, size and where each one opens.
MP3 vs FLAC
| Property | MP3 | FLAC |
|---|---|---|
| Quality | Good | Excellent |
| File size | Small | Medium |
| Compatibility | Opens everywhere | Widely supported |
| Advantages |
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| Disadvantages |
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FLAC keeps more detail than MP3. Convert MP3 files when the app, site or workflow you use needs FLAC.
How it works
- Step 1:
Drop the MP3 file on the orange block above, or press “Choose MP3”.
- Step 2:
Press “Convert to FLAC”. The block shows the progress while the server converts the file.
- Step 3:
Press “Download” to save the FLAC file. On Free the link works for 24 hours.
How MP3 to FLAC conversion works
MP3 is an audio format: it applies psychoacoustic lossy compression to remove frequencies the human ear perceives least, producing small files at acceptable audio quality. FLAC is an audio format that applies lossless compression to PCM audio, preserving the original waveform exactly while reducing file size by 40-60% versus WAV. This conversion changes the file's encoding, compression method, and supported feature set. The waveform is decoded and re-encoded without perceptual loss; if the source was already lossy, the encoder cannot restore detail the original codec discarded. Converting between these two formats is common when the source application does not support FLAC natively or when the target platform only accepts FLAC. 1converter processes this conversion server-side using open-source tools. Files are transferred over HTTPS, converted on secure cloud servers, and returned through a private download link that expires after 24 hours on Free.
Sources and specifications
Quality levels for MP3 → FLAC
| Level | File size | Speed |
|---|---|---|
| Low qualitySmallest file, basic quality | Very small | Very fast |
| Medium qualityRecommendedBalanced size and quality | Medium | Fast |
| High qualityLarger file, great quality | Large | Moderate |
| Maximum qualityLargest file, best possible quality | Very large | Slow |
Audio Tip: For music, High quality (320kbps) is recommended. Medium quality works well for podcasts and voice recordings.
When to convert
What the FLAC file is good for and why people convert to it.
- FLAC is lossless, so the output is an exact reconstruction of the decoded MP3 audio
- Better archival storage: FLAC supports metadata and can be re-encoded later without additional generation loss
- Archiving MP3 collections as FLAC for long-term storage and future reprocessing
- Moving tracks into a DAW/library pipeline that works best with lossless formats
Where your file goes
- It travels to our server over an encrypted HTTPS connection and is converted there.
- The FLAC file comes back as a private link. It stops working after 24 hours on Free and 7 days on paid plans, and then the files are deleted.