FLAC to MP3 Converter
Each FLAC file comes back as an MP3 encoded at a fixed 192 kbps constant bitrate, with title, artist and album tags copied into ID3. MP3 is lossy, so keep the FLAC files as your master copies.
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Why people convert FLAC to MP3
FLAC stores audio losslessly: a CD rip or a hi-res download keeps every sample, at roughly half the size of the equivalent WAV. The trade-off is playback. Plenty of car head units, older iPods and pocket players, budget Bluetooth speakers, some TVs and many web upload forms still refuse a .flac file outright, and an album of FLAC tracks can take a few hundred megabytes of phone storage. MP3 is the one audio format that practically every piece of playback hardware made since the late 1990s can decode without a plug-in.
On this page the work happens on our servers, not in your browser. Each upload goes through a single ffmpeg pass that decodes the FLAC stream and re-encodes it with libmp3lame at a requested constant 192 kbps. There are no sliders: no bitrate, sample rate or encoder-quality selector, no volume normalization, no noise removal and no trimming. The whole track is converted from the first sample to the last, and the job is the same for one file or ten.
What survives: title, artist and album tags are rewritten as ID3 in the MP3, and any chapter marks ffmpeg finds in the source are carried over. Sample rates up to 48 kHz pass through unchanged, so a 44.1 kHz CD rip stays at 44.1 kHz, while a hi-res FLAC above 48 kHz (88.2 or 96 kHz) is resampled down, since MP3 goes no higher than 48 kHz. Mono stays mono, and anything with more than two channels is folded down to stereo, so a multichannel FLAC will not stay multichannel. Embedded cover art is dropped, because every picture stream is removed during encoding, and 24-bit depth has no equivalent in MP3 at all.
The step is also one-way: MP3 discards audio data that FLAC kept, and converting back later restores file size but not detail. Use this page for the copies rather than the archive, whether that is a USB stick for the car, a playlist that has to fit a 32 GB phone, or an upload form that rejects lossless files.
How to convert FLAC to MP3
- Check that the FLAC files play through to the end first. The most common failure on this pair is a half-downloaded or truncated FLAC, which the encoder reports as "Cannot determine format of input stream 0:0 after EOF". Re-download or re-rip that track before uploading.
- Drag the files onto the dropzone, or click to browse. A guest batch holds up to 10 files of 50 MB or less; signing in lifts the per-file ceiling to 100 MB, with 200 MB on Plus and 1 GB on Pro.
- Mix sources if you need to. Because the target on this page is locked to MP3, you can drop WAV, M4A, OGG, WMA, AIFF, APE or other supported audio files in the same batch as your FLACs and they will all come out as MP3.
- Press Convert and wait. Album-length tracks of the size people usually upload here finish within a few seconds of the upload completing; a long single file such as a concert recording takes proportionally longer.
- Download each MP3 individually, as there is no ZIP bundle for batches. Every file keeps its original base name with a .mp3 extension, and the link works for about four hours.
What this converter actually does
- libmp3lame encoding at a requested 192 kbps constant bitrate, identical on every file, with nothing to misconfigure
- Title, artist and album tags transferred from the FLAC metadata into ID3 so your player still sorts the tracks
- Chapter marks carried over when the source file contains chapters, which matters for single-file live sets and spoken recordings
- Sample rates up to 48 kHz passed through untouched; anything higher, such as 96 kHz hi-res, is lowered to 48 kHz
- Mixed batches: FLAC together with other supported audio formats, all encoded to MP3 in one request
- Output file names match the input names, so track numbering and folder order survive the round trip
Video Tutorial
Watch this step-by-step tutorial to learn how to convert FLAC files to MP3 format online for free using MiConvert.com. No software installation required.
FLAC to MP3 questions
Can I get 320 kbps MP3s?
No. The encoder always requests 192 kbps CBR and the page has no quality selector. For 320 kbps, encode locally with foobar2000, dBpoweramp or the lame command line, where you set the rate yourself. For a car stereo or earbuds, 192 kbps CBR is a sensible middle ground.
Is FLAC to MP3 lossless?
No. FLAC is lossless; MP3 is a lossy codec, so the encoder permanently throws away information it judges inaudible. On most speakers and headphones a 192 kbps MP3 of a clean source is hard to tell apart from the FLAC, but the loss is real and cannot be undone. Keep the FLAC files as the archive copy.
Will the album cover come across?
No. Cover art and any other embedded image are dropped from every output this converter produces, so your MP3 will have text tags but no artwork. Re-attach it afterwards in a tag editor such as Mp3tag or Kid3.
What happens to a 24-bit, 96 kHz hi-res FLAC?
The audio is resampled to 48 kHz, folded to stereo if it has more than two channels, and encoded as 192 kbps MP3; MP3 has no concept of bit depth, so 24-bit is gone. Our WAV and AIFF outputs are always 16-bit too, so if you want to keep the hi-res master, keep the FLAC file itself and use the MP3 only for playback.
Why does my file fail with "Cannot determine format of input stream"?
The decoder reached the end of the file before it had a complete audio stream: usually an interrupted download, a copy off a failing drive, or something that is not really FLAC despite the extension. Re-download the track or re-rip the disc, then upload again.
How many FLAC files can I convert at once, and how often?
Ten files per request as a guest or free user, 25 on Plus and 50 on Pro. Guests and free accounts are also limited to 10 conversion jobs per hour and 2 running at the same time from one IP address, so a very large library is better handled in several sessions or with a desktop encoder.
Does this work on Mac, Windows, Linux or Android?
Yes. It is a web page, so you only need a browser, and the decoding and encoding run on our servers rather than on your machine. That also means you do not need any codec pack, FLAC plug-in or iTunes workaround on the computer you are using.
What happens to my files after the conversion?
The uploaded FLAC is erased once the job ends, and each MP3 stays downloadable for roughly four hours before it is deleted automatically. Traffic runs over HTTPS and the link is a long random token, but it is not single-use: anyone holding it can fetch the file until it expires. We do log file names, sizes and outcomes, and signed-in accounts keep a conversion-history row.