Is converting AAC to FLAC free?
Yes. This tool is completely free with no limits, watermarks or sign-up requirements.
Free AAC audio converter
Convert AAC to FLAC
Convert AAC audio to FLAC for free, right in your browser. Upload a .aac file, pick FLAC from the output menu and the converted audio appears instantly in a player you can listen to before downloading. Everything is re-encoded locally — no uploads, no accounts, no watermarks.
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What is AAC to FLAC conversion?
AAC (AAC) and Free Lossless Audio Codec (FLAC) are two popular audio formats, but not every player or editor reads them all. This free converter decodes your .aac file and re-encodes it as a valid .flac file. The whole conversion runs in your browser, so your audio stays private.
How it works
- 1Upload a .aac audio file.
- 2Choose FLAC from the output format menu — the conversion starts automatically.
- 3Preview the converted audio in the browser player.
- 4Download the converted .flac file. No signup needed.
Why this tool
- 100% private. The conversion runs entirely in your browser. Your audio file is never uploaded to a server.
- Free, no signup. No accounts, no watermarks, no file size limits. Convert as many audio files as you like.
- 7 output formats. Pick AAC, AIFF, FLAC, M4A, MP3, WAV or WMA from the dropdown next to the preview.
Frequently asked questions
Are my audio files uploaded to a server?
No. The conversion happens entirely in your browser with FFmpeg WASM, so your AAC file never leaves your device.
How do I convert AAC to FLAC?
Upload a .aac file, choose FLAC from the output menu and the converted audio is previewed immediately. Click Download to save the .flac file.
What output formats can I choose?
AAC, AIFF, FLAC, M4A, MP3, WAV, WMA — the dropdown next to the preview switches between them.
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