Convert MP3 to FLAC Online Free
Convert MP3 audio to FLAC format. Server-side processing with FFmpeg ensures high-quality audio conversion with optimal encoding settings.
ChangeThisFile converts your MP3 audio to FLAC container format using FFmpeg on our secure servers. Note that this wraps the audio in a lossless container but cannot restore quality lost during MP3 encoding. Encrypted transfer with automatic file deletion, free and no signup needed.
Convert MP3 to FLAC
Drop your MP3 file here to convert it instantly
Drag & drop your .mp3 file here, or click to browse
Convert to FLAC instantly
MP3 vs FLAC: Format Comparison
Key differences between the two formats
| Feature | MP3 | FLAC |
|---|---|---|
| Codec | MPEG-1 Audio Layer III | Free Lossless Audio Codec |
| Compression | Lossy | Lossless |
| Quality | Good at 192+ kbps | Bit-perfect / lossless |
| Typical bitrate | 32-320 kbps | ~800-1200 kbps |
| Max sample rate | Up to 48 kHz | Up to 655 kHz |
| Channels | Stereo | Up to 8 |
| Metadata | ID3v1/ID3v2 tags | Vorbis comments, cover art |
| Compatibility | Universal | Most modern players |
When to Convert
Common scenarios where this conversion is useful
Audio editing preparation
Convert MP3 to FLAC before editing in a DAW to avoid additional quality loss from re-encoding.
Format standardization
Standardize your audio library to FLAC format for consistent processing in professional workflows.
Archival purposes
Store audio in FLAC format for long-term archival, even if the source was lossy.
Audiophile music libraries
FLAC provides lossless compression, cutting file sizes in half while preserving every bit of audio data.
How to Convert MP3 to FLAC
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1
Upload your MP3 file
Drag and drop your .mp3 file onto the converter, or click to browse. Files up to 50 MB are supported for free.
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2
Server-side conversion
Your file is securely uploaded and converted on our servers using FFmpeg, the industry-standard multimedia framework. This typically takes a few seconds.
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3
Download the result
Once conversion is complete, click Download to save your .flac file. The uploaded file is automatically deleted from our servers.
Frequently Asked Questions
Yes, completely free. Convert MP3 to FLAC with no cost, no signup, and no watermarks.
No. Files are automatically deleted immediately after conversion. Nothing is stored or retained.
Yes. Files are transferred over encrypted HTTPS connections. Your data is protected in transit.
The conversion uses FFmpeg, the industry-standard multimedia framework on our servers, ensuring reliable and high-quality output.
No. Converting from a lossy format (MP3) to a lossless format (FLAC) preserves the existing quality but cannot restore data lost during the original lossy encoding.
Common metadata like title, artist, and album are transferred when supported by both MP3 and FLAC formats.
The converter uses high-quality default settings appropriate for FLAC. The exact bitrate depends on the format's optimal encoding parameters.
The original sample rate is preserved in the output file whenever the target format supports it.
FLAC supports Up to 8. Channel layout is preserved when supported by both formats.
File size depends on duration, bitrate, and compression. FLAC files with Lossless are larger than uncompressed audio.
Currently, files are converted one at a time. Upload your next file after downloading the result.
Files up to 50 MB are supported for free conversion.
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