FLAC Converter
FileFlip converts FLAC files into 11 other formats entirely inside your browser, using WebCodecs and FFmpeg compiled to WebAssembly. The FLAC file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. There is no file-size limit and no account to create.
How do I convert a FLAC file?#
- Drop your FLAC file onto the converter at the top of this page, or click it to pick one from your computer.
- Choose the format you want out of it. FileFlip downloads the engine that conversion needs, once, and your browser caches it.
- Conversion starts the moment you pick the format, and the result is yours to download. The work happens in this tab, so nothing is uploaded and nothing is queued.
Is it safe to convert FLAC files online?#
Yes, because nothing is uploaded. FileFlip converts FLAC files inside the browser tab you already have open, using WebAssembly builds of the same engines a desktop converter would install. Your file is read from your own disk into the page's memory, and no request carrying it is ever made.
You do not have to take that on trust. Open your browser's network panel, run a conversion, and you will see the engine come down and your file go nowhere. There is no upload, no server-side copy, no retention window, and no account tied to what you converted.
How FileFlip works lists every engine, its version and its download size, and shows how to check for yourself that nothing leaves your machine.
What happens to a FLAC file#
FileFlip converts FLAC into 11 formats with WebCodecs and FFmpeg, all of it inside the browser tab. Each conversion below names the engine it uses, what it downloads, and exactly what that conversion keeps or drops.
| Category | Audio Files |
|---|---|
| File extension | .flac |
| FileFlip support | Read and written |
| Conversions available | 11 |
| Engines | WebCodecs and FFmpeg |
| Downloaded to your browser | 30.8 MB on the first conversion, then cached |
What is a FLAC file?#
A FLAC file holds audio compressed with the Free Lossless Audio Codec, which shrinks the data by roughly 40-60% and reconstructs the exact original samples, bit for bit, on decode.
Use FLAC to archive or edit audio when you want compression without giving up any of the source quality.
Convert FLAC to MP3 or AAC for a portable device or streaming use case where storage space matters more than keeping a bit-perfect copy.
The FLAC file format reference covers the specification, the programs that open one, and what each conversion keeps or drops.
FLAC questions people ask#
Does converting MP3 to FLAC improve the sound quality?
No, converting MP3 to FLAC does not improve sound quality. FLAC only guarantees that what goes into the encoder comes back out unchanged; it can't restore audio detail an MP3 encoder already discarded, so the result is a larger file that sounds exactly like the MP3 it came from.
Is FLAC actually lossless?
Yes, FLAC is genuinely lossless: decoding a FLAC file reproduces the exact same digital samples that went into the encoder, bit for bit, unlike lossy formats such as MP3 or AAC that permanently discard data. The compression works by predicting each sample from the ones around it and storing only the much smaller difference.
What plays FLAC files?
VLC, foobar2000 and Audacity play FLAC on any platform, and it's natively supported by Windows Media Player since Windows 10, by the Music app on macOS since 10.13 High Sierra, and by Android's built-in player since Android 3.1. Apple's Music app on iOS has played FLAC since iOS 11.
Can you hear the difference between FLAC and a high-bitrate MP3?
For most listeners on typical equipment, no: a 320 kbps MP3 and its FLAC source are very difficult to tell apart in a blind test. FLAC's advantage isn't sounding better, it's being an exact copy, which matters for archiving, editing or any further encoding step where compounding lossy artifacts is a real risk.
Does FLAC support surround sound and high-resolution audio?
Yes, FLAC supports up to 8 channels, bit depths up to 32-bit and sample rates up to 1,048,575 Hz, well beyond what a CD or a standard streaming file needs. That headroom is one reason it's the format record labels and archives use for high-resolution reissues.