MP3 to FLAC
MP3 to FLAC is a free online audio converter for changing MP3 files into FLAC files. MP3 to FLAC accepts 2 MIME types, returns audio/flac, includes 0 settings, and runs in your browser on the device.
Drop .mp3 file here
or click to choose
Key facts
- Input
- 1 format: MP3 (audio/mpeg, audio/mp3)
- Output
- FLAC (audio/flac)
- Runtime
- your browser on the device
- Settings
- 0 controls; default conversion path
- File mode
- 1 input file creates 1 output file
- Cost
- $0, no account required
How to use MP3 to FLAC
- 1
Open your MP3 file
Drop your MP3 file onto the page, or click to browse and pick one from your device.
- 2
Choose options
No options to configure. MP3 to FLAC uses sensible defaults.
- 3
Convert and download
Click Convert. Your FLAC file is ready to download in seconds.
MP3 to FLAC details
First, MP3 to FLAC reads MP3 source files and prepares FLAC output for the audio workflow. Next, MP3 to FLAC keeps the conversion path simple with no extra controls. Additionally, Files and text stay in the browser session.
Re-encode an MP3 file as FLAC, a lossless compressed format. Note that the MP3 source is already lossy; this conversion preserves whatever quality is in the MP3 but cannot restore detail the original encoder discarded. FLAC is still useful here for archival, for pipelines that require a lossless container, or for libraries that prefer FLAC. Runs entirely in your browser using ffmpeg.wasm; nothing is uploaded. Expect a few seconds for a 5-minute song; longer files may take a minute or two.
Common searches
- mp3 to flac
- convert mp3 to flac
- mp3 to flac converter
- change mp3 to flac
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- mp3 to lossless
Related tools
Tools that work with the same formats — most users open one of these next.
FLAC to MP3
Convert FLAC lossless audio to MP3 — free online, no upload.
Audio Trimmer
Cut a clip from an audio file — MP3, WAV, OGG, FLAC, M4A, AAC.
MP3 to WAV
Convert MP3 audio to uncompressed WAV — free online, no upload.
MP3 to OGG
Convert MP3 audio to Ogg Vorbis — free online, no upload.
MP3 to AAC
Convert MP3 audio to AAC with selectable bitrate — free online, no upload.
MP3 to M4A
Convert MP3 audio to M4A (AAC in MP4 container) — free online, no upload.
Frequently asked
What is MP3 to FLAC?
MP3 to FLAC is a free online audio converter for changing MP3 files into FLAC files. MP3 to FLAC accepts 2 MIME types, returns audio/flac, includes 0 settings, and runs in your browser on the device.
What files does MP3 to FLAC accept and create?
MP3 to FLAC accepts MP3 files (audio/mpeg, audio/mp3) and creates FLAC files (audio/flac). There are no required settings before conversion.
Do my files and data stay private?
Yes. MP3 to FLAC runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.
How do I use MP3 to FLAC?
Open MP3 to FLAC, drop in your MP3 file, choose any options, and click Convert. Your browser does the work locally and produces a FLAC file you can save right away.
What is the maximum file size for MP3 to FLAC?
Because MP3 to FLAC runs in your browser, the maximum size depends on your device's available memory. Most modern phones and laptops handle files up to a few hundred MB without issues.