Convert FLAC to MP3
Convert FLAC audio files to MP3 format instantly in your browser. Shrink lossless files by 80-90% while keeping great audio quality — perfect for phones, car stereos, and streaming. No upload needed.
Drag 'n' drop files here, or
click to select files
.flac
Drop your files and click Convert to get MP3
//when_to_use
When to Convert FLAC to MP3
- Transferring a FLAC music library to an iPhone or Android phone with limited storage
- Converting CD rips from Exact Audio Copy or dBpoweramp to MP3 for car USB drives
- Preparing FLAC podcast masters for distribution on Spotify, Apple Podcasts, and other platforms
- Reducing the size of a Bandcamp or HDtracks lossless music collection for portable listening
- Converting FLAC audiobooks to MP3 for players that don't support FLAC (older Kindle, some car stereos)
//comparison
FLAC vs MP3
| Property | FLAC | MP3 |
|---|---|---|
| Compression | Lossless (FLAC codec) | Lossy (LAME MP3) |
| Typical file size (4 min song) | 25-40 MB | 3-5 MB |
| Audio quality | Bit-perfect (lossless) | 192kbps (transparent) |
| Sample rate | Up to 192kHz | Up to 48kHz |
| Device support | Most modern players, not universal | Universal |
| Metadata | Vorbis comments | ID3 tags |
//how_it_works
How It Works
Drop your FLAC files
Drag and drop or select FLAC audio files. Any bit depth (16/24-bit) and sample rate (44.1-192kHz) supported. First use loads FFmpeg WASM (~30MB).
FFmpeg decodes FLAC losslessly
FFmpeg WASM reads the FLAC container and decodes the lossless audio stream in your browser. Every sample is reconstructed exactly as the original recording.
LAME MP3 encoding at 192kbps
The LAME encoder compresses the audio at 192kbps constant bitrate using psychoacoustic modeling. Inaudible frequencies are removed, reducing file size by 80-90% from the FLAC source.
Download compact MP3s
Your MP3 files are ready — a 30MB FLAC becomes a ~4MB MP3. Play on any device, upload to any platform, or fit your entire library on your phone.
// under the hood
FLAC uses lossless compression (typically 50-60% of uncompressed WAV size) preserving the original PCM audio bit-for-bit. Our converter uses FFmpeg WASM to decode FLAC and re-encode with the LAME MP3 encoder (libmp3lame) at 192kbps constant bitrate. LAME's psychoacoustic model analyzes the audio spectrum and removes frequencies below the human audibility threshold, achieving 80-90% size reduction from FLAC with transparent quality.
//faq
Frequently Asked Questions
- What is the difference between FLAC and MP3?
- FLAC (Free Lossless Audio Codec) preserves every bit of the original recording with zero quality loss, resulting in large files (20-40MB per song). MP3 uses psychoacoustic compression to discard inaudible frequencies, reducing file size by 80-90% while sounding virtually identical to most listeners.
- Why convert FLAC to MP3?
- FLAC files are too large for most portable devices, car stereos, and streaming. A typical album in FLAC is 300-500MB, while the same album in MP3 at 192kbps is 50-80MB. MP3 is also universally supported — every device and app plays it without issues.
- What quality is the MP3 output?
- We encode at 192kbps using the LAME encoder, which is considered transparent quality for most listeners. In blind listening tests, most people cannot distinguish 192kbps MP3 from the FLAC original, especially on consumer headphones and speakers.
- Can I convert an entire album at once?
- Yes. Drag and drop or select multiple FLAC files for batch conversion. Each file is processed sequentially by FFmpeg WASM in your browser and can be downloaded individually or all at once.
- Are my files private during conversion?
- Absolutely. All processing happens in your browser using FFmpeg compiled to WebAssembly. Your audio files never leave your device — no upload, no server, zero access from us.