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Supports: HEVC
.hevc, .h265, or .mov files containing HEVC video. Batch is supported — every file is processed locally in your browser session.HEVC (High Efficiency Video Coding, also called H.265) became the default capture codec on iPhone 7 and later when iOS 11 shipped on September 19, 2017. Inside almost every HEVC file you'll find an AAC-LC audio track at 48 kHz stereo, though Blu-ray rips and some camcorder masters carry AC-3 (Dolby Digital) instead. WAV stores audio as raw uncompressed PCM, which is why every digital audio workstation, transcription engine, and broadcast tool accepts it as a first-class input. Extracting the audio to WAV does not "upgrade" lossy AAC to lossless — it simply repackages the decoded samples without further encoding loss.
| Property | AAC-LC inside HEVC | WAV (PCM output) |
|---|---|---|
| Compression | Lossy (perceptual) | None (uncompressed) |
| Typical iPhone settings | 48 kHz, stereo, ~128–256 kbps | Matches source by default |
| Bitrate (16-bit/44.1 kHz stereo) | 128–256 kbps | 1,411 kbps |
| File size, 1 minute stereo | ~1–2 MB | ~10.6 MB at 44.1 kHz, ~11.5 MB at 48 kHz |
| Quality after editing re-saves | Degrades each save | No further loss |
| Patents / royalties | MPEG-4 AAC patent pool | Public domain (Microsoft RIFF spec) |
| DAW native support | Most modern DAWs | Universal — every DAW since the 1990s |
| Embedded / legacy hardware | Frequently unsupported | Near-universal |
| Sample Rate | Best For | Notes |
|---|---|---|
| 8000 Hz | Telephony, IVR test audio | Narrow-band speech only; music sounds muffled |
| 16000 Hz | Speech-to-text (Whisper, ASR) | Mono recommended; halves file size vs 44.1 kHz |
| 24000 Hz | Voice-over / podcast intermediates | Compromise between ASR and music quality |
| 44100 Hz | CD audio, music distribution | Use if delivering to streaming or pressing CDs |
| 48000 Hz | Video-paired audio (default for iPhone HEVC) | Match the source — avoids resampling |
| 96000 Hz (not offered here) | Studio masters | Up-sampling from 48 kHz adds zero new information |
No. The audio inside an HEVC file was already encoded with a lossy codec (typically AAC-LC at 128–256 kbps, sometimes AC-3). Converting to WAV decodes those samples and stores them uncompressed, but the perceptual data discarded during the original encode is gone for good. WAV's value here is preserving what's left without further loss during editing — not restoring detail.
Leave Audio Sample Rate set to "Original" — iPhone HEVC video is captured at 48000 Hz, and matching that rate avoids a resample step. The output WAV is 16-bit PCM by default, which carries far more dynamic range than the source AAC, so the conversion will not bottleneck quality.
Yes. The decoder reads whatever audio stream is inside the HEVC container — AAC-LC, AAC-HE, AC-3, E-AC-3, or sometimes PCM. The output is always WAV PCM. If your source has multiple audio tracks (e.g., 5.1 surround + stereo commentary), the primary track is decoded; multi-track demuxing is not exposed in this tool.
The WAV contains only audio, so it's much smaller than the full HEVC file (which carries video + audio). However, the audio portion alone is 5–10× larger as WAV than as AAC. A one-hour HEVC source at 48 kHz stereo produces roughly 690 MB of WAV.
Yes. Use the Trim controls to set a start time and duration in seconds or HH:MM:SS.sss format. For example, start 00:01:30.500 with duration 45 extracts 45 seconds of audio beginning 90.5 seconds into the video. Only that segment is decoded and written.
WAV is universally supported but uncompressed (~10.6 MB/min at 44.1 kHz stereo). FLAC compresses losslessly to roughly 50–60% of WAV size while staying bit-identical, but a small number of older DAWs, samplers, and embedded devices don't read FLAC. Pick WAV for maximum compatibility, HEVC to FLAC for archival storage with smaller files.
For email or chat sharing, yes — HEVC to MP3 yields a ~1 MB/min file at 128 kbps versus ~11 MB/min for WAV. Use WAV when you'll edit further (each MP3 re-save degrades quality) and MP3 only when the file is the final deliverable for casual playback.
Yes. iOS and macOS screen recordings store the captured audio as AAC inside the HEVC container, exactly like camera footage. The converter decodes that track and writes it to WAV. If you recorded with both microphone and system audio mixed, the mix is preserved as a single stereo track — the streams cannot be separated post-hoc.
Yes. Add multiple files in step 1; each is processed in your browser session and packaged for download. There's no per-file re-upload — the conversion runs locally, so total time scales with your CPU rather than upload bandwidth. For trimming the audio further afterward, see the Audio Cutter.