FLAC to MP3 Converter
Inspect your FLAC file metadata in the browser and generate the perfect FFmpeg command to convert it to MP3 at your chosen bitrate.
Inspect FLAC Metadata
Drop a FLAC (or any audio) file to read its properties. Nothing is uploaded.
FFmpeg Command Generator
ffmpeg -i input.flac -ab 320k -map_metadata 0 output.mp3
Install FFmpeg free at ffmpeg.org.
Replace input.flac with your actual filename.
Batch convert (Linux / macOS)
for f in *.flac; do ffmpeg -i "$f" -ab 320k -map_metadata 0 "${f%.flac}.mp3"; done
GUI alternatives
- fre:ac — free, open-source, Windows / macOS / Linux
- Audacity — free multi-track editor with MP3 export (LAME required)
- dBpoweramp — paid, batch conversion, Windows / macOS
- VLC — free media player with basic convert/transcode feature
Drop a FLAC file on the left to inspect its metadata
No file is uploaded — everything runs in your browser
Decoding audio metadata...
Duration
—
Sample Rate
—
Channels
—
Source File Size
—
Estimated MP3 Output Size
128 kbps
—
192 kbps
—
320 kbps
—
Formula: bitrate (kbps) x duration (s) / 8000. Actual size may vary by a few percent.
MP3 Bitrate Reference
| Bitrate | Quality | Size / min | Best For |
|---|---|---|---|
| 96 kbps | Acceptable | ~0.7 MB | Voice, speech, podcasts |
| 128 kbps | Good | ~0.9 MB | Earbuds, laptop speakers |
| 192 kbps | Very Good | ~1.4 MB | General music listening |
| 256 kbps | Excellent | ~1.9 MB | Audiophile, quality headphones |
| 320 kbps | Near-lossless | ~2.4 MB | High-end systems, archival MP3 |
| VBR V0 | Transparent | ~1.5–2.5 MB | Best quality-to-size ratio |
FLAC vs. MP3 — At a Glance
FLAC (Lossless)
- Bit-perfect reproduction of source
- Preferred for DAWs and archival storage
- Supports 24-bit / hi-res audio
- Large files (20–40 MB per track)
- Not supported by all streaming platforms
MP3 (Lossy)
- Universal device and platform compatibility
- Small file size (3–10 MB per track)
- Ideal for streaming and portable playback
- Discards audio data permanently
- Re-encoding degrades quality further
Summary
Inspect your FLAC file metadata in the browser and generate the perfect FFmpeg command to convert it to MP3 at your chosen bitrate.
How it works
- Drop a FLAC file onto the inspector panel (or click to browse).
- The Web Audio API reads the file's sample rate, duration, and channel count locally.
- Choose an MP3 bitrate — 128 kbps for casual listening, 192 kbps for good quality, 320 kbps for near-lossless.
- Copy the generated FFmpeg command and run it in your terminal.
- Verify the output MP3 in a player before deleting your original FLAC.
Use cases
- Shrink a FLAC music library for a portable device or phone with limited storage.
- Prepare audio tracks for upload to platforms that prefer or require MP3.
- Convert a FLAC podcast or audiobook for car or earphone playback.
- Batch-convert an album by adapting the single-file command into a shell loop.
- Check a FLAC file's sample rate and duration before encoding.
- Estimate the output MP3 file size before committing to a bitrate.
- Generate a ready-to-paste FFmpeg command without memorizing its flags.
- Compare FLAC and MP3 characteristics side-by-side before deciding on a format.