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FLAC to MP3 Converter

Upload FLAC files or drag and drop

FLAC files. Converted to MP3 in your browser - nothing is uploaded.

MP3

Conversion runs entirely in your browser using WebAssembly. Your audio is never uploaded. Large files use more memory, so very long recordings may be slow on older devices.

Convert lossless FLAC files into compact MP3s for phones, cars and streaming, all in your browser. FLAC sounds great but the files are large and not every device plays them. Choose a bitrate, add one file or a batch, and convert on your device with nothing uploaded. Your library stays private and the tool works offline once the page has loaded.

No signupRuns in your browserWorks offlineFormula explained belowGeneral information only

How to use this tool

  1. 1Drop your FLAC files onto the upload area, or click to browse.
  2. 2Pick an MP3 bitrate: 192 kbps is a good default, 320 kbps keeps the most detail.
  3. 3Click Convert to MP3. Each FLAC decodes and re-encodes on your device.
  4. 4Download each MP3, or download the batch as a zip.

Example

FLAC album track to a portable MP3

Add a 30 MB FLAC track, choose 320 kbps, and convert. The MP3 is roughly 7 MB for a three-minute song and plays on any device, while staying close to the source in everyday listening.

Batch of FLAC files for the car

Drop a folder of FLAC tracks, pick 256 kbps, convert, and download the zip. You get a compact MP3 set that fits a USB stick and works with car head units that reject FLAC.

Common use cases

  • Shrinking a FLAC music library so it fits on a phone with limited storage
  • Making MP3 copies of FLAC albums for a car stereo that does not support FLAC
  • Creating small MP3 previews of lossless masters to share online
  • Converting a downloaded FLAC concert recording into MP3 for a portable player

Common mistakes

  • Choosing a low bitrate for music - FLAC is lossless, so use 256 or 320 kbps to preserve as much quality as possible in the MP3.
  • Expecting the MP3 to be lossless like the FLAC - MP3 is always lossy, so there is some quality trade-off for the smaller size.
  • Keeping only the MP3 and deleting the FLAC - if you value quality, keep the FLAC as your master since you cannot recreate it from the MP3.
  • Converting FLAC to a very low bitrate for archiving - for archiving, keep FLAC or use WAV, not a small MP3.

Frequently asked questions

Why convert FLAC to MP3 at all?

FLAC is lossless and large, and many phones, cars and apps do not play it. MP3 is far smaller and plays almost everywhere. Converting gives you a practical everyday copy while you keep the FLAC as your high-quality master.

How much quality do I lose?

MP3 discards some audio data, but at 256-320 kbps the difference from the FLAC source is very hard to hear in normal listening. Lower bitrates save more space at the cost of some detail, so choose based on how you will listen.

How much smaller is the MP3?

A lot smaller. FLAC files are often 5-10x the size of a 320 kbps MP3. A 30 MB FLAC track typically becomes a 6-8 MB MP3, which is why MP3 is ideal for phones and streaming.

Is my FLAC uploaded to a server?

No. The FLAC is decoded and the MP3 encoded entirely in your browser using WebAssembly. Nothing is uploaded, so your music library stays private and the tool works offline once the page has loaded.

Should I keep the FLAC after converting?

Yes, if you care about quality. MP3 is lossy, so you cannot rebuild the original FLAC from it. Keep the FLAC as your archive master and use the MP3 as the convenient copy for portable listening.

Can I convert a whole album at once?

Yes. Add all the tracks and they convert one after another. When several finish you can download them together as a single zip file instead of saving each track separately.

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