AAC to FLAC converter
Turn AAC files into FLAC for free. The conversion runs entirely in your browser, so your audios are never uploaded anywhere.
How to convert AAC to FLAC
- Add your AAC files. Drop one or more .aac files on the box above, or tap it to pick them from your device.
- Let it convert. The first audio you convert loads the converter once (about 31 MB, then cached). After that it runs on your device; a progress bar shows how far along it is.
- Download the FLAC. Press Download next to each file. Nothing was sent to a server, so close the tab and it's gone.
What is a AAC file?
AAC is the audio codec used by YouTube, iTunes and most video. Raw .aac files often come out of recorders and downloads.
What is FLAC?
FLAC is lossless compressed audio: the same sound as a CD or studio master at roughly half the size of WAV.
Why convert AAC to FLAC?
AAC is great for good sound at small sizes, but raw .aac files won't play in many apps, players and cars. FLAC is the better choice for hi-fi music libraries and archiving; keep in mind files are large and many phones, cars and apps don't play FLAC.
Will I lose quality?
No. FLAC is lossless, so every sample that AAC gave us is kept exactly.
Private by design
Most online converters upload your file to their servers. This one doesn't: the converter itself is loaded into your browser and works offline from there, so your audios never leave your phone or computer.
Questions
Is this AAC to FLAC converter free?
Yes, completely free, with no sign-up, no watermark and no daily limit.
Are my AAC files uploaded?
No. The conversion happens inside your browser on your own device. Nothing is sent to us or anyone else.
Can I convert AAC to FLAC on iPhone or Android?
Yes, in a modern browser. Phones are slower than computers for video, and very long videos can run out of memory on older phones.
Can I convert several files at once?
Yes. Drop as many as you like; they are converted one after another and each gets its own download button.
Is there a file size limit?
No fixed limit, but your browser has to hold the whole file in memory, so files over about 2 GB may fail.