MP3 to FLAC Converter
Convert MP3 to FLAC free online. Get a high-quality FLAC file from your MP3 — perfect for music libraries, archiving, and audio editing. No signup, no software.
Convert to FLAC
Drop MP3 here or click to browse
MP3 audio files, up to 500MB total
High Quality · Compression only changes file size — audio quality stays the same at every setting
Need a transcript too?
Drop your FLAC audio into ScriberGPT for clean text with timestamps and speaker labels.
How to convert MP3 to FLAC
1. Upload your MP3
Drag and drop your MP3 file, or click to pick one from your device. You can queue multiple files for batch conversion.
2. Pick compression
FLAC keeps the same audio quality at every setting. The compression preset only changes file size and encode speed.
3. Convert and download
Click convert, wait a few seconds, then download your FLAC file — ready for music libraries, archiving, and audio editing.
Why use this MP3 to FLAC converter
No extra quality loss
FLAC keeps the audio quality of your MP3 exactly as it is. The conversion does not throw away any extra detail — you just get the same audio in a different format.
Smaller than WAV
FLAC is around 40 to 60 percent smaller than the equivalent WAV file but holds the exact same audio. So you get editing-friendly quality without huge files.
Files stay private
Everything happens in your browser. Your audio is never uploaded to a server, so your files stay yours.
MP3 to FLAC: A Simple Guide
Convert MP3 to FLAC free online and get a high-quality audio file you can keep in a music library, drop into an editing project, or use as the source for further conversions. No signup, no upload, no software to install.
What is FLAC?
FLAC keeps every sample of the audio it stores. When you convert an MP3 to FLAC, the new file holds the exact same audio as the MP3 — nothing extra is dropped. FLAC is the format music libraries, archivists, and audiophiles use when they want clean files without large WAV sizes.
Will the FLAC sound better than the MP3?
No. MP3 is a compressed format that already removes some detail to keep files small. FLAC will hold whatever the MP3 contains — it can't bring back audio that was already lost. What FLAC does give you is a file that won't lose any more quality if you edit or re-export it.
How to pick a compression setting
FLAC has compression levels but the audio quality is the same at every level. Lower compression = faster and bigger. Higher compression = slower and smaller. For most cases, leave it on the default.
How batch conversion works
Drop in a stack of MP3s and convert them all to FLAC in one go. Useful for music collections, podcast archives, and long-term backups.
Which MP3 files work?
The tool handles standard MP3 files from music libraries, voice recorders, podcast exports, downloads, and audio editing apps. DRM-protected or corrupted MP3 files won't work.
Why files stay on your device
Everything runs in your browser. We never upload your audio to a server, so private recordings, client work, and your personal music library stay yours.
FLAC vs WAV — which is better?
Both keep the exact same audio quality. WAV is bigger but every editing app uses it. FLAC is smaller but better for backups and music libraries. For editing, WAV is the safer pick. For storage, FLAC saves you 40 to 60 percent in file size.
Where FLAC plays back
FLAC plays in VLC, Audacity, iPhone (iOS 11+), Android, Chrome, Firefox, Edge, and most music players. For sharing on the web or social media, MP3 or AAC might be easier.
Frequently Asked Questions
How do I convert MP3 to FLAC?
Upload your MP3, pick a compression setting, then click Convert to FLAC. Download your file when it's ready.
Does FLAC sound better than MP3?
Not when converting from MP3. MP3 already removed some detail to keep the file small, and FLAC just holds whatever the MP3 contains. FLAC does give you a clean starting point that won't lose more quality if you edit or re-export it.
Is FLAC smaller than WAV?
Yes. FLAC files are usually 40 to 60 percent smaller than WAV files, with the exact same audio quality.
Why would I convert MP3 to FLAC?
For music libraries, archiving, and editing. FLAC is a cleaner working format than MP3 — even if the audio quality is the same, FLAC won't keep losing quality each time you re-export it.
Is there a file size limit?
Free conversions are capped at 50MB total per request. For bigger files, compress or split the MP3 first.
Do you upload my audio?
No. Everything happens in your browser. Your audio never leaves your device.