Add MP3 files
Upload non-empty .mp3 files up to 100 MB each.
Free online MP3 to FLAC converter
Convert MP3 audio into a new FLAC file.
Add MP3 files up to 100 MB, convert them one at a time with Fileverses, and download each new FLAC result. A FLAC output cannot recover detail MP3 compression already removed.
- Files not stored
- Sequential MP3 queue
- 100 MB each
Processed by our self-hosted conversion engine
Supported files
MP3 in. FLAC out.
MP3FLAC
Add readable MP3 audio up to 100 MB. Fileverses writes a new audio-only FLAC from the first audio stream.
How it works
MP3 in. A new FLAC file out.
Convert to FLAC
Start the fixed server-side FFmpeg queue to create one new FLAC per supported source.
Review and download
Check each finished result where playback is supported, then download its separately named FLAC file.
Limits and quality
A FLAC file cannot restore lost MP3 detail.
FLAC is lossless for the newly decoded audio, but it cannot recover information removed by earlier MP3 compression. Metadata and chapters are removed and no audio settings are exposed.
Convert MP3 to FLACMP3 input and 100 MB maximum
Only non-empty .mp3 files up to 100 MB are accepted; host FFmpeg must be able to read the source and find audio.
First audio stream only
The conversion maps the first audio stream, excludes video, and produces FLAC audio only.
No restoration or controls
The result is a new FLAC encode, not a stream copy. Metadata and chapters are removed; no trim, stream-selection, bitrate, sample-rate, channel, or quality controls are available. A new FLAC cannot recover detail lost in MP3.
MP3 to FLAC FAQ
Questions, answered.
Can MP3 to FLAC improve sound quality?+−
No. FLAC is lossless for the newly decoded audio, but it cannot restore details removed when the MP3 was originally lossy-encoded.
Which MP3 files can I convert?+−
Upload non-empty .mp3 files up to 100 MB each. Host FFmpeg must be able to read the file and its audio stream.
What will the downloaded file contain?+−
A successful conversion creates an audio-only FLAC file from the source’s first audio stream.
Can I convert multiple MP3 files?+−
Yes. Add supported files to the queue. Jobs process sequentially, and each completed conversion has its own download.
Will tags, cover art, or chapters be retained?+−
No. The route removes source metadata and chapters, so do not rely on tag, artwork, or chapter preservation.
Can I trim audio or choose sound settings?+−
No. This route uses a fixed conversion profile and does not provide editing, stream-selection, bitrate, sample-rate, channel, or quality controls.