HEVC to MKV - Online Video Converter

Convert HEVC to MKV online. Private, client-side - no upload required. Batch conversion, quality presets, codec control.

Convert HEVC to MKV

[+] Drop HEVC video here or click to select HEVC, MP4

Output format

MKV (H.264 / AAC)

No transcoding (remux only)[i]

Mode[i]

Simple Advanced

Quality[i]

Resolution[i]

About HEVC to MKV

Convert HEVC to MKV. HEVC is the H.265 codec halving bitrates versus H.264. MKV is an open container holding multiple video, audio, and subtitle tracks. Only the selected tracks carry over, so pick audio and subtitles first..

Why convert HEVC to MKV?

Smaller files with MKV lossy compression.
Keep animation and transparency where supported.
Private, no upload - runs in your browser.

HEVC vs MKV

Animation	Yes	Yes
Transparency	No	Yes
Compression	lossy	lossy
Typical use	HEVC is the H.265 codec halving bitrates versus H.264.	MKV is an open container holding multiple video, audio, and subtitle tracks.

When not to convert HEVC to MKV

Skip MKV for archival masters: lossy compression discards detail, so keep the HEVC original.
Keep a master copy: repeated exports stack small losses, so archive HEVC before batch MKV shares.

Limits

Starting point: HEVC - HEVC is the H.265 codec halving bitrates versus H.264. Raw streams lack timing, so set frame rate by hand. Only the selected tracks carry over, so pick audio and subtitles first. Encode MKV (H.264 / AAC) from HEVC at a bitrate near the source, and confirm the audio track before converting.

How conversion works

Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.

Related conversions

FAQ

How do I convert HEVC to MKV?

Drop your HEVC file onto this page, choose quality and codec settings, then click Convert. The result downloads as MKV instantly. All processing runs in your browser.

What codec is used for MKV?

The default codec for MKV is H.264 / AAC. You can change the video and audio codec in Advanced mode.

How do you store my files?

We do not store any processed videos. All conversion happens entirely in your browser using FFmpeg WASM.