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MP3 to FLAC Converter
Convert MP3 (.mp3) to FLAC (.flac) via a free public conversion API from the browser. UniConvert is come-convert-leave: no account and no permanent file library.
Open the interactive MP3 to FLAC Converter (loads automatically when JavaScript is available).
How to convert MP3 to FLAC
- Step 1. Choose a .mp3 file from your device.
- Step 2. Confirm the output format is .flac — this page is already set to MP3 → FLAC.
- Step 3. Start the conversion, then preview, copy, or download the .flac result. Nothing is kept for later.
Why convert MP3 to FLAC here
- MP3 → FLAC uses a free public API called directly from the page — no UniConvert servers in the middle.
- Category: Audio — Transcode audio formats when a media engine such as FFmpeg is available.
- No signup, no subscription, and no permanent storage of your files on UniConvert.
- Status: available now.
MP3 to FLAC FAQ
Is this MP3 to FLAC converter free?
Yes. UniConvert does not require an account for MP3 → FLAC. Ads may appear to keep the site free.
Do you store my MP3 files?
Files for this pair are sent to the free conversion provider for processing and are not stored by UniConvert afterward.
What is the difference between .mp3 and .flac?
.mp3 is treated as the input format and .flac as the output. Use this page when you specifically need MP3 → FLAC rather than a generic upload form.
Can I convert other formats in Audio?
Yes — open the Audio category for other pairs, or use Convert a file to pick any available source and target.