HEVC to FLAC Converter

Convert HEVC to FLAC: Read This First

A bare .hevc file is a raw H.265 video bitstream — by design it carries picture only, with no audio track inside it. So if your goal is to pull a soundtrack out of a .hevc and save it as lossless FLAC, there is usually nothing to pull: the resulting file would be silent. This page is honest about why, shows how the converter behaves, and points you to the file that actually holds your audio.

Why a Raw HEVC File Has No Sound

HEVC (High Efficiency Video Coding) is defined by ITU-T H.265 | ISO/IEC 23008-2, first published in 2013, and that standard describes a video codec — it specifies nothing about audio. A file saved with a plain .hevc extension is normally a raw elementary stream: a sequence of H.265 video NAL units in Annex B format, and nothing else. There is no container around it to hold a parallel audio track, so there is no sound to decode.

The HEVC video you watched with sound almost certainly lived inside a container — an .mp4, .mkv, or .mov — that wrapped the H.265 video next to a separate audio track. When a file is exported or demuxed down to a bare .hevc, that audio is left behind. If you ran this conversion and got a silent FLAC, that is not a bug in the converter — it is the raw HEVC stream doing exactly what the format specifies.

How to Convert HEVC to FLAC

1. Upload Your HEVC File: Drag and drop your .hevc onto the page, or click "+ Add Files" to choose it from your computer. You can queue several files to process with the same settings.
2. Set the Compression Level: Open "Show All Options" and use the Compression level slider (1–12). FLAC is lossless at every setting — the level only trades encode speed against file size. The default of 12 squeezes the smallest file; a lower number encodes faster but leaves the file larger. The audio itself is bit-for-bit identical either way.
3. Set Audio Channel and Sample Rate (Optional): Audio Channel and Audio Sample Rate both default to Original, which copies the decoded audio untouched — the safest choice. Force a fixed rate such as 44100 Hz or 48000 Hz only if a target device needs it, and use Trim to grab just a portion of the timeline.
4. Convert and Download: Click "Convert" and download your FLAC. No sign-up, no watermark.

Walk-through: Will Your HEVC File Actually Have Sound?

Whether you get audio depends entirely on what you actually uploaded, because the H.265 specification defines only video — any audio rides in the container alongside it. The common cases:

• A true raw .hevc elementary stream: This is video only. A FLAC made from it will be empty or silent — there is nothing inside to extract. Nothing in the settings can create a soundtrack that was never in the file.
• A container that was misnamed .hevc: Occasionally an .mp4 or .mkv gets renamed with a .hevc extension. If your file is secretly a container with a real audio track, the converter will decode that track to FLAC normally. But that is the exception, not the rule.
• You actually want the soundtrack of an HEVC video: then you are starting from the wrong file. Upload the full container — the .mp4, .mkv, or .mov that holds both the H.265 video and the audio — to the matching tool below.

If you are not sure whether your file is a bare stream or a container, check the extension: .hevc (and .h265, .265) are video-only elementary streams, while .mp4, .mkv, and .mov can carry both video and audio together.

Where Your Audio Probably Is

• The original download or recording: the playable file you started from is almost always an .mp4, .mkv, or .mov. That container holds the audio. Convert that file, not the demuxed .hevc.
• An MP4 container: use MP4 to FLAC to decode the audio track from an MP4 (which often carries H.265 video) into lossless FLAC.
• An MKV container: use MKV to FLAC for Matroska files, which frequently pair HEVC video with FLAC, AC-3, or AAC audio.

When This Doesn't Work

If your HEVC file is a true elementary stream with no companion audio, no tool can manufacture sound that was never encoded — the fix is to find the original container or the separate audio file. And keep one thing in mind even when audio is present: video containers normally store audio as a lossy codec such as AAC or AC-3, so packaging it into FLAC gives you a lossless wrapper around already-lossy audio. FLAC will preserve exactly what is there, but it cannot restore detail the original lossy encode discarded — it is not a quality upgrade. If you only want the video in a playable package rather than its audio, transcode it with HEVC to MP4 instead.

Frequently Asked Questions

Why is my HEVC to FLAC output silent or empty?

Because a raw .hevc file is an H.265 video elementary stream and holds no audio. There is no soundtrack inside the file to decode, so any FLAC produced from a bare .hevc will be silent. The audio for that footage lived in the container (an .mp4, .mkv, or .mov) the video was demuxed from. Convert that container to FLAC instead.

Does a .hevc file contain audio I can extract?

Normally no. HEVC, defined by ITU-T H.265 / ISO/IEC 23008-2, is a video-only codec, and a plain .hevc, .h265, or .265 file is a raw video bitstream with no audio track. You only get sound out if the file you uploaded is actually a container (such as an MP4 misnamed .hevc) that happens to carry an audio track alongside the video.

Will FLAC improve the quality of audio extracted from a video?

No. FLAC is the Free Lossless Audio Codec, so it stores whatever it is given without further loss — but the audio inside a video container was almost always encoded with a lossy codec like AAC or AC-3. Converting that to FLAC produces a lossless file that faithfully preserves the lossy source; it cannot recover detail the original encode already threw away. FLAC here means a clean, edit-ready copy, not a higher-fidelity one.

How do I get FLAC audio from a video that actually has sound?

Start from a file that genuinely contains an audio track. If your video is an MP4, use MP4 to FLAC; if it is a Matroska file, use MKV to FLAC. Both formats interleave video and audio, so the converter has a real audio track to decode into FLAC. A bare .hevc stream does not.

What does the Compression level slider do for FLAC?

FLAC is lossless at every compression level, so the slider (1–12) only changes how hard the encoder works to shrink the file — not the audio quality. In our testing, level 12 produces the smallest FLAC and the slowest encode, while a lower number finishes faster but leaves a slightly larger file. The decoded samples are bit-for-bit identical regardless of where you set it.

Is this HEVC converter free and private?

Yes. There is no sign-up and no watermark. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — never shared or made public.