FLAC to MP3 Converter
Processed locally in your browser — nothing is uploaded.
Quick answer
FLAC is a lossless format — bit-perfect, but large, and unsupported by many phones, car stereos and basic players. Converting FLAC to MP3 produces a compact, universally playable file at the bitrate you choose, while keeping your FLAC master untouched. This tool encodes in your browser with ffmpeg.wasm and uploads nothing. The engine is a one-time ~10 MB download on first use, then every conversion is local.
How to flac to mp3 converter
Add your FLAC file
Drop a .flac file onto the drop zone. The tool decodes the lossless audio, ready to re-encode.
Pick an MP3 bitrate
Because FLAC is lossless, this is your first quality choice — 192 kbps is a solid music default, 320 kbps the MP3 maximum, 128 kbps for spoken content.
Convert and download
The MP3 is encoded on your device from the full-quality FLAC source and handed back for download.
Why convert FLAC to MP3?
FLAC gives you a perfect copy of the audio at roughly half the size of WAV, which makes it the format of choice for archiving and audiophile libraries. The catch is playback: a great deal of everyday hardware simply cannot read it. Many phones (especially older ones), most car stereos, Bluetooth speakers, fitness devices and web upload forms expect MP3 and ignore FLAC entirely. Converting to MP3 trades a little quality — usually inaudible — for the ability to play the file *anywhere*, while your lossless FLAC stays safe as the master.
Why FLAC is the ideal MP3 source
Encoding an MP3 from FLAC is the best-case scenario. Because FLAC preserves every original sample, the MP3 encoder starts from full quality and loses detail only once — the single, clean compression MP3 was designed for. Compare that to transcoding one lossy file into another (say AAC to MP3), where detail is lost twice. If you keep a FLAC library, it is the perfect place to generate MP3s for portable use.
| Scenario | FLAC | MP3 |
|---|---|---|
| Archiving a master copy | Yes — lossless | No — lossy |
| Phone / car / Bluetooth playback | Often unsupported | Yes — universal |
| File size | Large (≈ 5× MP3) | Small |
| Re-editing later | Yes — bit-perfect | Not ideal |
| Sharing with anyone | Risky compatibility | Safe |
What bitrate keeps the quality?
Since your source is lossless, spend enough bitrate to make the conversion transparent. For music, 192 kbps is a strong default and 320 kbps — the MP3 ceiling — is the choice when you want the closest possible match to the FLAC on good equipment. Reserve 128 kbps for spoken-word FLACs, where it is plenty. There is no benefit to a bitrate above 320: MP3 cannot store more.
Audio locked inside a video?
FLAC-to-MP3 is about existing audio files, but if the sound you want lives in a video, you can extract the audio from a video straight to MP3 in the browser instead. Come back here only when you are starting from an actual FLAC.
Is my FLAC uploaded to convert it?
No. FLAC files are often large and belong to carefully curated libraries — they stay on your machine. ffmpeg.wasm decodes and re-encodes the audio inside your browser tab, with no server involved. Open DevTools → Network and you will see your file is never transmitted, only the one-time engine is fetched.
Related audio tools
Building the library rather than emptying it? WAV to FLAC compresses masters into lossless FLAC for archiving. For other targets, the audio converter handles any pair, and if you only want to make a file smaller, the audio compressor does that without changing formats.
Your files never leave your device
Processed locally in your browser — nothing is uploaded. You can verify it yourself: open your browser’s developer tools, watch the Network tab, and use the tool — no upload request is ever made.
Frequently asked questions
Does FLAC to MP3 reduce quality?
Yes, slightly — MP3 is lossy, so some detail is discarded. But because FLAC is a full-quality source, the loss happens only once and is inaudible at 192 kbps or higher for most listeners.
How much smaller will the MP3 be?
Typically the MP3 is about a fifth of the FLAC’s size, though it depends on the bitrate. A 30 MB FLAC track becomes roughly 4–7 MB as MP3.
Why doesn’t my phone play FLAC?
Many devices — especially older phones, car stereos and Bluetooth speakers — never added FLAC support. Converting to MP3 sidesteps the problem because MP3 is supported everywhere.
Should I delete my FLAC files after converting?
No. Keep the FLAC as your lossless master. If you ever want a different MP3 bitrate or another format, re-encoding from FLAC avoids stacking up quality loss.
What is the best bitrate for FLAC to MP3?
For music, 320 kbps gives the closest match to the FLAC, while 192 kbps is nearly as good at a smaller size. Use 128 kbps only for spoken-word content.
Can I convert a whole album of FLAC files?
Yes. Add multiple FLAC files and each is encoded locally in turn. There is no upload and no per-file limit beyond your device’s memory.
Is the conversion private?
Completely. It runs in your browser with ffmpeg.wasm and never uploads your files, which you can verify in the DevTools Network tab.