FLAC to MP3
Shrink a lossless library down for a phone, a car, or an old player.
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or drag them here
FLAC or OGG · one or many
- Takes
- FLAC, and OGG carrying Vorbis or Opus — plain .flac and FLAC inside an OGG both read. Drop a whole album and they convert one after another on the same settings. Safari's FLAC support is incomplete and may refuse a file Chrome accepts, which the tool reports by name rather than failing silently.
- Size
- No cap, and nothing is uploaded, so the only ceiling is your own tab's memory. FLAC is read off disk in pieces rather than loaded whole; a 50 MB, 12-minute file converted here in about six seconds. What is held is the MP3 being written — about 2.4 MB per minute at 320 kbps.
Your file never leaves your browser during processing
How it works
To convert FLAC to MP3, drop the file onto this page and choose a bitrate — 256 or 320 kbps if you care about the music, 192 kbps if you care about the space. The conversion runs in your browser, nothing is uploaded, and a FLAC typically drops to around a fifth of its size.
FLAC is lossless compression: it packs audio down to roughly half or two-thirds of the equivalent WAV and can reconstruct the original samples exactly. That makes it the right format for a library you are keeping, and the wrong format for a phone with 64 GB in it, a car stereo from 2014, or anything that has never heard of it.
Converting to MP3 decodes the FLAC back to its exact original samples and then encodes those with a lossy codec. Because the starting point is a perfect reconstruction rather than an already-degraded file, this is a first-generation encode — the same quality you would get by ripping the CD straight to MP3, with none of the compounding that hurts when you convert one lossy format to another. That is why FLAC and WAV are the two sources worth converting from, and why this page defaults to a higher bitrate than the ones aimed at speech.
At 320 kbps most listeners cannot reliably distinguish the MP3 from the FLAC on ordinary equipment, and the file lands at about a fifth of the original. At 192 kbps the saving is larger and the difference becomes audible on good headphones with music that has a lot of detail — cymbals and applause are where MP3 struggles most. The expected size is calculated from your bitrate and the length of the track before you commit.
The work happens in your browser: your file is decoded locally and re-encoded by a WebAssembly MP3 encoder that loads once per session, before processing begins. The counter under the tool monitors network activity while your file is handled and stays at zero bytes sent. Keep the FLAC — the MP3 is the copy for the device, not a replacement for the archive.
One browser caveat, because it is better said than discovered: FLAC decoding leans on the codecs your browser and operating system provide, and Safari's is inconsistent — it reports FLAC as supported and then refuses some files outright. Chrome, Edge, and Firefox decode the same files without complaint. If a conversion stops here with a decoder message, that is what happened, and another browser will finish the job.
FAQ
What bitrate should I use for FLAC to MP3?
Use 320 kbps if the point is listening and 192 kbps if the point is fitting more on a device. Because FLAC is lossless, the encode starts from a perfect source, so a high bitrate here genuinely buys quality — unlike converting from an already-compressed format.
How much space will I save?
Roughly five times at 320 kbps and eight times at 192 kbps, compared with the FLAC. A three-minute track that takes 25 MB as FLAC lands around 7 MB at 320 kbps.
Can I convert back to FLAC afterwards?
You can produce a FLAC file from the MP3, but it will not restore anything — it would losslessly preserve the already-degraded audio in a much larger file. Keep the original FLAC if the archive matters.
Are tags and album art kept?
Basic metadata carried in the file is copied across where the MP3 container can hold it. Embedded artwork and less common tag fields may not survive the conversion, so treat the MP3 as the listening copy and tag it in your music app if the details matter.
Why did the conversion stop with a decoder error in Safari?
Because Safari's FLAC decoder accepts the format in principle and then rejects some files in practice. Nothing is wrong with your file — Chrome, Edge, or Firefox will convert it. The tool reports it rather than failing silently.
Does this upload my music?
No. Decoding and encoding both run in your browser, and the network counter under the tool stays at zero bytes sent throughout processing.