AC3 to HE-AAC - Online Audio Converter
Convert AC3 to HE-AAC online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
About AC3 to HE-AAC
Convert AC3 to HE-AAC. AC3 (Dolby Digital) carries 5.1 surround on DVDs and broadcasts. 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 AC3 to HE-AAC?
- Smaller files with HE-AAC lossy compression.
- Keep quality where supported.
- Private, no upload - runs in your browser.
AC3 vs HE-AAC
| Codec | AC-3 | AAC (HE) |
|---|---|---|
| Compression | lossy | lossy |
| Sample behavior | Quality set by bitrate | Quality set by bitrate |
| Typical use | AC3 (Dolby Digital) carries 5.1 surround on DVDs and broadcasts. | HE-AAC adds spectral band replication for efficient low-bitrate streaming. |
When not to convert AC3 to HE-AAC
- Skip HE-AAC for archival masters: lossy compression discards detail, so keep the AC3 original.
- Keep a master copy: repeated exports stack small losses, so archive AC3 before batch HE-AAC shares.
Limits
Starting point: AC3 - AC3 (Dolby Digital) carries 5.1 surround on DVDs and broadcasts. Downmix choices change loudness; check levels after conversion. Needs an HE-AAC decoder; plain AAC players may play only half the bandwidth. Encode HE-AAC (AAC (HE)) from AC3 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.