Free online tool
Convert MP3 to FLAC
Free online MP3 to FLAC converter - runs entirely in your browser. No upload, no account, no file size limit.
Drop MP3 files here
MP3 · and other formats (MP3, WAV, FLAC, AAC, OGG, M4A, OPUS, WMA, AIFF)
Audio sounds damaged or noisy?
Professional restoration by real engineers - noise removal, voice clarity, echo reduction.
Why convert MP3 to FLAC?
- →FLAC is losslessly compressed audio, making it ideal for music archives, audiophile listening, and long-term storage.
- →Your MP3 files are processed entirely in your browser - nothing is uploaded to any server.
- →Batch-convert as many files as you need in one click, then download them individually or all at once.
- →Note: converting from a lossy format (MP3) to a lossless one (FLAC) will not recover lost data, but it avoids further compression artifacts.
- →FLAC files are typically 40-60% smaller than WAV while preserving the same audio data.
How to convert MP3 to FLAC online
- 1
Upload your MP3 files
Drag and drop or click to select files. You can add multiple MP3 files at once.
- 2
FLAC is pre-selected
The output format is already set to FLAC. Optionally adjust quality settings before converting.
- 3
Click Convert
Hit Convert while the audio engine loads in the background. No server involved.
- 4
Download your FLAC files
Download files one by one or all at once. No registration, no email, no waiting.
Source format
MP3
the most widely compatible audio format.
Best for: sharing, streaming, and everyday playback.
LossyOutput format
FLAC
losslessly compressed audio.
Best for: music archives, audiophile listening, and long-term storage.
LosslessProfessional audio restoration
Audio sounds noisy or unclear?
Converting format does not fix audio quality issues. If your MP3 has noise, hiss, hum, or muffled speech, WefixSound engineers can professionally restore it. Free sample before you pay.
Frequently asked questions
Will I lose quality converting MP3 to FLAC?
FLAC is lossless, so no further quality is lost in the conversion. If your source MP3 is already lossy, converting to FLAC preserves it without additional compression artifacts.
Is the MP3 to FLAC converter free?
Yes - completely free. No account, no registration, no email required. The tool runs in your browser and processes files locally.
Is my file uploaded to a server?
No. The converter runs entirely inside your browser tab. Your MP3 files never leave your device.
Is there a file size limit?
There is no server-side limit. Practical limits depend on your device memory.
Can I convert multiple MP3 files to FLAC at once?
Yes. Drop as many files as you need into the tool and click Convert.