Convert AAC to FLAC Online — Free & Instant
Convert your AAC files to FLAC format online in seconds — completely free, no registration required.
AAC to FLAC Converter
Drag & drop .AAC files here
Only .AAC files accepted
Free tier: 10 of 10 conversions remaining today • Upgrade coming soon
About AAC to FLAC Conversion
Need to convert a AAC file to FLAC? FileConvertTool makes it effortless. Simply upload your AAC file, and our converter will transform it into a high-quality FLAC file in seconds — completely free, with no registration required.
AAC is an advanced lossy audio codec that delivers better quality than MP3 at similar bitrates. AAC is the default audio format for Apple devices, YouTube, and many streaming services.
FLAC is a lossless audio codec that compresses audio to roughly 50-60% of the original size without any quality loss. FLAC is preferred by audiophiles and music archivists.
Our cloud-based converter handles the heavy lifting server-side, so it works on any device — desktop, tablet, or mobile — without installing any software. Your files are processed securely and automatically deleted after conversion.
Why Convert AAC to FLAC?
There are many reasons you might need to convert AAC to FLAC:
Compatibility — FLAC may be required by a specific platform, application, or device that doesn't support AAC files natively.
File size — Converting from AAC to FLAC can help optimise your file size for your specific use case.
Web performance — FLAC is widely supported for streaming and playback.
Quality requirements — FLAC preserves full quality with lossless compression, ideal for archival and professional work.
Sharing — FLAC files are universally recognised and easy to share via email, messaging apps, and cloud storage services.
AAC vs FLAC Comparison
| Feature | AAC | FLAC |
|---|---|---|
| Format Type | Audio | Audio |
| Compression | Lossy | Lossless |
| Quality | Good (adjustable) | Maximum |
| Typical File Size | Small | Large |
| Web Support | Excellent | Limited |
| Transparency | No | No |
How to Convert AAC to FLAC
Click "Choose File" or drag and drop your AAC file into the upload area.
The converter is pre-set to AAC → FLAC. Adjust settings if needed.
Click "Convert" and wait a few seconds for processing to complete.
Download your converted FLAC file — it's ready to use immediately.
Frequently Asked Questions
Is it free to convert AAC to FLAC?
Yes, FileConvertTool offers free AAC to FLAC conversion. Free users get 10 conversions per day with files up to 200 MB. For unlimited conversions and larger files, check out our Pro and Business plans.
Will I lose quality converting AAC to FLAC?
No. FLAC uses lossless compression, so your converted file will retain full quality with no data loss.
How long does AAC to FLAC conversion take?
Most conversions complete in under 10 seconds. Larger files or video conversions may take a bit longer depending on file size and complexity.
Is my file safe during conversion?
Absolutely. All files are processed securely on our servers using encrypted connections. Uploaded files are automatically deleted after conversion — we never store, share, or access your content.
Can I convert AAC to FLAC on my phone?
Yes! FileConvertTool is fully responsive and works on any device — iPhone, Android, tablet, or desktop. No app installation needed; just use your web browser.
What is the maximum file size I can convert?
Free users can convert files up to 200 MB. Pro subscribers get a 500 MB limit, and Business plan users can convert files up to 2 GB.