Convert FLAC to MP3
Lossless FLAC rips shrunk to MP3 for your phone, car or old player, on your own device.
- Nothing is uploaded
- Works offline after first use
- Open source
- No sign-up, no watermark. The limit is your device’s memory (phones hold less).
Convert lossless FLAC albums to MP3 at up to 320 kbps in your browser, whole folders at once. It is free, needs no account and adds no watermark, and your files are not uploaded: everything runs in your browser on your device. The limit is your device’s memory, which is smaller on a phone, and after your first run the page works offline.
Your iPhone may take a few seconds to prepare the video first, longer if it's stored in iCloud.
Done
Open the network tab. Your files never appear in it.
Add files and run the tool to see every request this tab makes.
Your files are processed on this device and never sent to a server. Reload the page to clear everything from memory.
FLAC is how people keep music without losing anything: CD rips, Bandcamp and Qobuz purchases, vinyl digitised at home, live recordings from tapers. A single album is 250 to 400 MB, which is too big for a phone with limited storage, many car USB readers, older MP3 players and some DJ controllers. MP3 at 320 kbps takes a quarter of the space and, for almost everyone, sounds the same.
Drop a whole album, or a few, and every track converts in turn. Your browser decodes the FLAC natively and the LAME encoder in the page writes each MP3, so a 400 MB album is never uploaded anywhere. That also means no wait while a big file crawls up to a server and back.
This page opens at 320 kbps, the highest MP3 bitrate, because people converting from lossless usually want the best MP3 they can get. For a phone playlist, 192 kbps halves the size again with little audible difference. Hi-res FLAC files at 24-bit, 96 or 192 kHz are converted too; MP3 itself is 44.1 kHz, so they are resampled on the way.
How it works
- Drop FLAC tracks or a whole album, or tap to pick them.
- Keep 320 kbps for the best MP3, or choose 192 kbps for smaller files.
- Convert. The MP3s download together as a zip.
In your browser, not on a server
Your browser decodes the sound track with the same audio decoders it uses to play media on any website (AAC for MP4, MOV and M4A; Opus or Vorbis for WebM; FLAC, WAV and MP3). The samples are resampled to 44.1 kHz and handed to LAME, the reference MP3 encoder, compiled to WebAssembly and served by this site. WAV files are written directly by a few lines of code in the page. Everything happens in memory in your tab.
Compared with upload-based tools: Online converters upload the whole video just to keep its sound, cap free files at a few hundred megabytes, and make you wait in a queue. Home videos, lectures and voice memos are personal. Here the file never leaves your device, so a 1 GB video converts as fast as your computer can read it, and the limit is your device’s memory (phones hold less).
Verify it yourself. Give the page a short while after your first run to save itself for offline use, then turn off Wi-Fi or switch to airplane mode and run the tool again. Or open your browser's developer tools (F12, or Cmd-Option-I on a Mac), pick the Network tab, and watch it while you convert. The panel above does the same count for you.
Questions
Should I delete the FLAC files after converting?
No. Keep the FLACs as your master copies. MP3 is lossy, so if you ever want AAC, Opus or a different bitrate later, convert again from the FLAC rather than from an MP3.
Is 320 kbps worth it over 256?
For most music and listeners the difference is inaudible, and 256 kbps saves 20 percent of the space. 320 is the safe choice when you do not want to think about it.
Will the album art and track names carry over?
Not yet: the MP3s contain the audio only. File names are kept, so tracks named "01 Title.flac" stay in order as "01 Title.mp3".
Can it handle 24-bit hi-res FLAC?
Yes. It is decoded at full resolution and resampled to 44.1 kHz for the MP3, which is the rate nearly every MP3 uses.
More video and audio tools
Video to MP3
Pull the sound out of a video, or turn any audio file into an MP3. Your files are converted on this device and never uploaded.
Video to GIF
Trim a clip, pick a size and frame rate, and get a looping GIF. The video is decoded by your browser and never leaves this device.
GIF to MP4
Turn animated GIFs into small MP4 videos that post and play anywhere. Converted on this device, never uploaded.
Compress video
Make a video a fraction of the size, or fit it under a limit like 10 MB for Discord or 25 MB for email. It is compressed on this device and never uploaded.
Other conversions
Guides
- How to convert a video to MP3This is different from muting a video: you want the sound saved as its own file. Most devices have no built-in way to do that.
- Is CloudConvert safe?For most files, yes: it is an established, certified service. The real question is whether a given file should leave your computer at all.
- Is FreeConvert safe?FreeConvert is a legitimate service with a clear deletion policy. Whether it is safe for a particular file depends on whether that file should be uploaded anywhere.
- Is Convertio safe?Convertio is a well-known converter with a published deletion policy. For private files, the safer choice is a converter that never receives them.
- Is Zamzar safe?Zamzar is one of the oldest online converters. Its storage window is longer than most, which is the detail worth knowing.