Compress AAC Online — Reduce File Size by Up to 20-60%
Compress AAC files online instantly. Reduce .aac file size by 20-60% with no quality loss. Batch compress 100+ files. No signup, no watermarks.
Batch Settings
About AAC Compression
AAC (Advanced Audio Coding) is the default audio codec for Apple devices, YouTube, and most streaming services. It offers better quality than MP3 at equivalent bitrates.
CocoConvert's AAC compressor re-encodes at a target bitrate, allowing you to balance quality and file size. For most uses, 128kbps AAC is virtually transparent — professional audio engineers struggle to distinguish it from the original in blind tests.
For voice content, 64-96kbps AAC is excellent. For high-quality music, 192-256kbps preserves every nuance.
Batch compression is available for Pro users. All processing uses FFmpeg's native AAC encoder.
How to Compress AAC
- 1
Upload your AAC file
Drag and drop your .aac file into the upload area, or click to browse. Batch upload is supported.
- 2
Adjust compression settings
Use the quality slider to control the compression level. Lower values produce smaller files.
- 3
Click "Compress"
CocoConvert compresses your AAC file using optimised audio encoding.
- 4
Download the compressed AAC
Your smaller .aac file is ready. Typical reduction: 20-60%.
Compression Tips
AAC
.aac file • Audio
96-128kbps is transparent quality for most listeners.
| Extension | .aac |
| MIME Type | audio/aac |
| Category | Audio |
Frequently Asked Questions
What are the limits for AAC compression?
CocoConvert lets you compress AAC files with no signup required. You get 5 files per hour (up to 250 MB each) on the starter tier. Pro users get 100 files per hour and 5 GB per file.
How much can I reduce AAC file size?
Typical AAC compression reduces file size by 20-60%, depending on the original file and quality settings. Tip: 96kbps for voice, 128kbps for general, 192kbps for music.
Does compression affect AAC quality?
CocoConvert gives you full control over the quality-size trade-off. Higher quality settings preserve more detail; lower settings produce smaller files. For lossless formats, compression is always bit-for-bit identical.
Is my AAC file secure?
Absolutely. Files are processed on isolated servers in Germany, encrypted in transit via TLS, never analysed or shared, and permanently deleted within 24 hours.
Can I batch compress multiple AAC files?
Yes! You can compress up to 5 files per hour on the starter tier. Pro users get 100 files, Business API users get 200. All files are processed in parallel.