FLAC to HE-AAC - Online Audio Converter
Convert FLAC to HE-AAC online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
About FLAC to HE-AAC
Convert FLAC to HE-AAC. FLAC halves WAV sizes bit-for-bit with open hardware support. HE-AAC adds spectral band replication for efficient low-bitrate streaming. Needs an HE-AAC decoder; plain AAC players may play only half the bandwidth..
Why convert FLAC to HE-AAC?
- Smaller files with HE-AAC lossy compression.
- Keep quality where supported.
- Private, no upload - runs in your browser.
FLAC vs HE-AAC
| Codec | FLAC | AAC (HE) |
|---|---|---|
| Compression | lossless | lossy |
| Sample behavior | Full quality kept | Quality set by bitrate |
| Typical use | FLAC halves WAV sizes bit-for-bit with open hardware support. | HE-AAC adds spectral band replication for efficient low-bitrate streaming. |
When not to convert FLAC to HE-AAC
- Skip HE-AAC for archival masters: lossy compression discards detail, so keep the FLAC original.
- Keep a master copy: repeated exports stack small losses, so archive FLAC before batch HE-AAC shares.
Limits
Starting point: FLAC - Bit-identical compression near half the WAV size. Apple players prefer ALAC; convert for iPhone libraries. Needs an HE-AAC decoder; plain AAC players may play only half the bandwidth. Encode HE-AAC (AAC (HE)) from FLAC at 256k for music or 128k for speech, starting from the master.
How conversion works
Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.