How to convert FLAC to AAC
- 1
Upload your file
Drag and drop a file or click to select one. Keep this page open while the file uploads and converts.
- 2
Convert FLAC to AAC
NexMedia converts FLAC to AAC on its own servers. Processing time depends on the file size and how busy the queue is.
- 3
Download the converted file
When the conversion finishes, the download appears on this page. Your converted file is kept for 2 hours, then deleted.
About FLAC
FLAC (Free Lossless Audio Codec) compresses audio without losing anything: the files are typically half to two thirds the size of WAV and decode back to the exact original samples.
Music archives, CD rips and high-resolution downloads.
FLAC files are several times larger than MP3, and some older players and car stereos do not play them.
Convert FLAC to AAC online free, no account required — AAC is the lossy audio codec that succeeded MP3.
Change FLAC to AAC without losing quality — convert FLAC to AAC free in your browser.
Why would anyone use FLAC when MP3 is so much smaller? FLAC stores the audio bit-for-bit with no loss at all, which matters for archiving and re-editing — the price is a file several times larger.
About AAC
AAC (Advanced Audio Coding) is the lossy audio codec standardised in MPEG-2 and MPEG-4 as the successor to MP3; at the same bitrate it generally sounds better than MP3.
It is the audio in most MP4 videos, in Apple Music and on YouTube; a .aac file is a bare AAC stream without a container.
A bare .aac stream has only limited room for tags and cover art, so music players usually expect AAC inside an M4A file.
Why convert music to AAC instead of MP3? At the same bitrate AAC sounds better, and every modern phone, computer and streaming service decodes it.
What changes when you convert FLAC to AAC
- The audio is decoded and re-encoded as AAC at the default settings, so the result is close to the FLAC but not bit-identical.
- AAC uses lossy compression: the encoder discards the detail that is least noticeable, so the file is smaller than the FLAC but cannot be turned back into the original.
Settings you can change
Before you convert FLAC to AAC, you can adjust: Audio codec, Rate control, Audio bitrate, Quality (VBR), Sample rate, Channels, Normalize loudness, Trim start, Trim duration, and Keep tags.
Limits
Each plan sets a maximum file size and a number of conversions per day, and video and audio files also have a maximum length. Guests can convert files up to 100 megabytes and 5 per day; a free account raises this to 500 megabytes and 25 per day; paid plans go up to 100 gigabytes.
Your converted AAC file is kept for 2 hours, then deleted.
FLAC to AAC: questions and answers
Does converting FLAC to AAC reduce quality?
The audio is decoded and re-encoded as AAC at the default settings, so the result is close to the FLAC but not bit-identical. AAC uses lossy compression: the encoder discards the detail that is least noticeable, so the file is smaller than the FLAC but cannot be turned back into the original.
What is the difference between FLAC and AAC?
FLAC is a lossless compressed audio format. AAC is the lossy audio codec that succeeded MP3.
Can I change the settings when converting FLAC to AAC?
Before you convert FLAC to AAC, you can adjust: Audio codec, Rate control, Audio bitrate, Quality (VBR), Sample rate, Channels, Normalize loudness, Trim start, Trim duration, and Keep tags.
Do I need an account to convert FLAC to AAC?
No. You can convert FLAC to AAC without an account; signing in raises the file-size and daily limits.
How long is my converted AAC file kept?
The AAC file you convert from FLAC is kept for 2 hours, then deleted automatically.
Will the AAC file be smaller than my FLAC?
AAC uses lossy compression: the encoder discards the detail that is least noticeable, so the file is smaller than the FLAC but cannot be turned back into the original.
When I convert FLAC to AAC, is the audio re-encoded?
The audio is decoded and re-encoded as AAC at the default settings, so the result is close to the FLAC but not bit-identical.