AAC to FLAC converter
Convert AAC files to FLAC with encrypted uploads and automatic deletion. Lossless compressed audio, popular with audiophiles.
Drop a AAC file, or click to browse
Converts to FLAC · runs live, right now
How it works
Drop your file
Drag a AAC file in, or click to browse. No account needed to try it.
We convert it
Encrypted upload, converted to FLAC in our ffmpeg pipeline.
Download the result
Grab your FLAC file immediately, or find it later in your dashboard.
Why convert AAC to FLAC?
FLAC is lossless, so converting from AAC won't compound any quality loss on future edits — though it can't restore detail AAC's lossy compression already discarded. The main reason to convert AAC to FLAC is compatibility: FLAC plays on virtually any device or app without an extra codec, while AAC doesn't always. If you're sharing a file with someone else, sending it to a tool that expects a specific format, or archiving it for the long term, FLAC is usually the safer target.
Format comparison
| AAC | FLAC | |
|---|---|---|
| Extension | .aac | .flac |
| MIME type | audio/aac | audio/flac |
| Compression | lossy compression | lossless compression |
| Category | audio | audio |
Your file, handled carefully
Uploads are encrypted in transit and at rest, processed in an isolated job, and deleted on the schedule you choose — as fast as immediately. We don't index, search, or share files between accounts. Read the full security model →
Frequently asked questions
Is converting AAC to FLAC free?
Yes — the first 50 conversions every month are free on any plan, including AAC to FLAC.
Will I lose quality converting AAC to FLAC?
FLAC is lossless compressed audio, popular with audiophiles. We use the highest-quality encoder settings by default so visual or data loss is minimized.
Do you keep a copy of my file?
No, not by default. You choose a retention window at upload — immediate, 1 hour, 24 hours or 7 days — and the file is permanently deleted after that.
What is AAC?
Efficient lossy codec used by streaming and Apple devices.
What happens if a conversion fails?
You get a clear error message and the job is marked failed in your history — we never silently drop a file. Retry is one click, and nothing is charged against your quota for a failed job.