Convert anything, at global scale.
200+ formats and automation APIs that feels instant.
CONVERT
From
To
Drop files or choose a source
Upload multiple files at once, mix formats, and fine-tune every conversion with format-aware settings.
Max 2GB per file · Drag & drop ready · Mixed file types welcome
FLAC at a glance
FLAC
FLAC grew inside the Xiph open-media ecosystem and later gained a formal RFC description, which strengthened its standing as a stable open lossless format rather than a niche hobbyist codec.
AAC at a glance
AAC
AAC emerged from MPEG's work on a more capable audio codec family after MP3, and Fraunhofer IIS remains one of the organizations most closely associated with its development and deployment.
Format comparison
| Feature | FLAC | AAC |
|---|---|---|
| File type | Audio | Audio |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2001 | 1997 |
| Inventor | Josh Coalson | MPEG |
| Status | active | proprietary |
| Primary use cases |
|
|
| Multitrack support | Not supported | Not supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Not supported | Supported |
When to use each format
When to use FLAC
- Your source file is already in FLAC.
- Preserve source expectations before exporting to AAC.
- FLAC is commonly used in audio workflows.
When to use AAC
- Your target workflow expects AAC.
- Improve delivery compatibility with AAC.
- AAC is commonly used in audio workflows.
FAQs
Why convert FLAC to AAC?
AAC conversion is essential when targeting Apple's ecosystem or streaming platforms.
Convert to AAC when creating podcasts, music streams, or audio for YouTube.
If your workflow includes iTunes integration or requires maximum compatibility with mobile devices, AAC is the practical choice.
Video producers frequently convert audio to AAC when working with MP4 video containers, since MP4s typically pair with AAC audio for optimal streaming compatibility.
AAC offers significantly better quality-per-bitrate than MP3 while maintaining broad compatibility.
Choose AAC when you need smaller file sizes than lossless formats but better audio quality than MP3 at equivalent bitrates.
What changes when converting FLAC to AAC?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to AAC adds streaming delivery.
What should I review after converting FLAC to AAC?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.