Skip to content
FLAC to MP3

Free browser-based converter

Convert FLAC audio files to MP3

Drop your FLAC audio files and get MP3s back in seconds. The conversion runs locally in your browser — nothing is uploaded, no software to install, and every tag and cover image comes along for the ride.

  • No upload
  • No signup
  • No file-size limit
  • Tags preserved
  • Free forever
MP3 bitrate

320 kbps — best quality, ~2.4 MB per minute

How to convert a FLAC audio file to MP3

Three steps — everything happens in your browser, no downloads or accounts needed.

  1. Add your FLAC audio files

    Drag one or more .flac files onto the drop zone, or click to browse your device. The page reads each file locally — nothing is uploaded to a server.

  2. Choose your MP3 bitrate

    Pick 128, 192, 256, or 320 kbps. The default is 320 kbps — the highest quality MP3 supports, about 2.4 MB per minute of audio. Conversion starts automatically.

  3. Download the MP3 files

    Click to save each file individually or grab all of them as a single ZIP. Tags, track numbers, and cover art from the original FLAC are already embedded.

What is a FLAC audio file?

FLAC stands for Free Lossless Audio Codec. Unlike MP3, which throws away parts of the audio signal to shrink the file, FLAC compresses without losing anything — like a ZIP file for music. When you play a FLAC file, every sample is restored exactly as it was recorded.

The downside is size. A typical FLAC file is 3–5 times larger than a 320 kbps MP3 of the same track. That matters on phones, portable players, and Bluetooth devices where storage is limited and lossless playback is often impossible anyway (Bluetooth's SBC and AAC codecs re-encode the audio in transit).

Converting to MP3 at a high bitrate gives you a file that plays everywhere, takes a fraction of the space, and — at 256 or 320 kbps — sounds identical to the FLAC original in any real-world listening scenario. Keep the FLAC as your master copy and use the MP3 for daily listening.

Technical specifications

Input formatFLAC (.flac) — 16-bit, 24-bit, 44.1–192 kHz all accepted
Output formatMP3 (.mp3) — constant bitrate via the LAME encoder
Bitrates128 / 192 / 256 / 320 kbps, 320 kbps by default
Batch limit20 files per run, with a single ZIP download
File-size limitNone — conversion is local, no upload involved
MetadataVorbis comments → ID3v2.3 tags; cover art preserved at full resolution
Processing100% on your device — Web Audio API decoder + LAME encoder in JavaScript
SpeedAbout 30× real time — a 4-minute track in roughly 5–15 seconds
Works offlineYes, once the page has loaded
CostFree — no signup, no watermark, no quota

FLAC audio file to MP3 — FAQ

What is a FLAC audio file?

FLAC (Free Lossless Audio Codec) is an open-source audio format that compresses music without discarding any data. A FLAC file is typically 2–3× smaller than the raw WAV or AIFF equivalent but decodes to a bit-perfect copy. The trade-off is size: a FLAC track is usually 3–5× larger than the same song in MP3 at 320 kbps.

Will converting a FLAC audio file to MP3 reduce quality?

MP3 is a lossy format, so some data is discarded during encoding. At 320 kbps — the default here — the difference is inaudible in controlled blind tests for the vast majority of listeners and playback systems. At 256 kbps the result is still considered transparent by most people. Below 192 kbps trained ears may notice artifacts on certain material.

Do my FLAC files get uploaded anywhere?

No. The entire conversion runs inside your browser tab using the Web Audio API and a JavaScript build of the LAME encoder. Your audio files, file names, and metadata never leave your device. You can disconnect from the internet after the page loads and the converter keeps working.

Is there a file-size limit?

No. Because nothing is uploaded, there is no server-side cap. A 600 MB 24-bit album converts the same way as a three-minute single. The only limit is your device's available memory.

Does the converter keep my tags and cover art?

Yes. Title, artist, album, album artist, track and disc number, year, genre, and composer are read from the FLAC's Vorbis comments and written as ID3v2.3 tags. Embedded cover art is carried across at full resolution.

Can I convert multiple FLAC audio files at once?

Yes — drop up to 20 files and they are processed in parallel. When the batch finishes you can download a single ZIP containing every MP3. For larger batches the batch converter handles up to 40 files per run with folder input.

Why convert FLAC to MP3 instead of keeping the original?

MP3 is universally supported: every phone, car stereo, Bluetooth speaker, and media player handles it. A 320 kbps MP3 is roughly one-third the size of the FLAC original, saving storage and making transfers faster — especially on phones with limited space. Keep the FLAC as your archive copy and use MP3 for everyday playback.

What bitrate should I choose?

320 kbps gives the highest MP3 quality and is the default. 256 kbps is a good balance between quality and file size. 192 kbps is fine for casual listening or when storage is tight. 128 kbps produces the smallest files but may sound noticeably compressed on good headphones.

More ways to convert

Have an entire album to process? The batch converter handles up to 40 files per run with folder input and a single ZIP download. Want to keep quality as close to the original FLAC as possible? The maximum-quality converter locks the bitrate to 256–320 kbps.

For a step-by-step walkthrough of different tools — including desktop apps like fre:ac, VLC, and ffmpeg — see How to Convert FLAC to MP3 (4 Free Ways). And if you are curious about what MP3 actually discards, the FLAC vs MP3 comparison breaks it down.