HEIC to MKV Converter
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Supports: HEIC
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HEIC is a still image — Apple's default photo format on the iPhone — so converting it to MKV produces a video clip that holds your photo on screen for a set number of seconds, with no motion added. Upload several HEIC files and they become a single MKV slideshow; upload one and you get a short clip of that frame. This is the fast way to drop iPhone photos into a Matroska timeline, a media-player playlist, or any pipeline that expects video instead of pictures.
How to Convert HEIC to MKV
- Upload Your HEIC File: Drag and drop your photos onto the page or click "Add Files." You can add several HEIC images at once.
- Choose Merge Images or Video per Image: Pick "Merge images" to combine every photo into one MKV slideshow, or "Video per image" to get a separate clip for each file.
- Set Duration and Quality Preset: Under Advanced Options, set "Duration" (seconds each photo stays on screen — 5 seconds by default) and a "Quality Preset" such as "Very High." A "Background Color" fills any letterbox bars when a photo's shape doesn't match the frame.
- Convert and Download: Click "Convert" to get your MKV. No sign-up, no watermark.
HEIC vs MKV at a Glance
| Property | HEIC | MKV |
|---|---|---|
| Type | Still image (one or more frames) | Video / multimedia container |
| Standard | HEIF, ISO/IEC 23008-12 (2015) | Matroska, open EBML format (2002) |
| Image/video payload | HEVC (H.265)-encoded picture | H.264 video by default here; AAC audio track if present |
| Color depth | Up to 10-bit, wide color | Depends on the video codec (8-bit with H.264) |
| Native playback | iOS 11+, macOS High Sierra+, Windows 10+ | VLC, MPV, Windows 10+ (not QuickTime) |
| Best for | Saving iPhone photos at small file size | A portable clip with optional audio, subtitles, and chapters |
Frequently Asked Questions
Does converting a single HEIC to MKV add any motion?
No. A single still photo cannot become real motion — there is nothing to animate. The MKV simply displays that one frame for the duration you set (5 seconds by default), so the result is a static-image clip. If you upload several HEIC files with "Merge images," each photo plays in sequence, which reads as a slideshow rather than continuous video.
Why would I convert an iPhone photo to MKV instead of keeping it as an image?
Some tools only accept video on a timeline. Editors, digital-signage players, and certain media servers want an MKV or similar clip, not a picture file. Wrapping the photo into MKV lets it sit in a video playlist, loop on a screen, or be concatenated with real footage. If you only need the picture itself in a widely supported image format, use HEIC to JPG instead.
Will the MKV play everywhere, given that HEIC often does not?
MKV playback is broader than HEIC playback on the desktop. VLC and MPV open MKV on every major OS, and Windows 10 and 11 play it natively. The catch is Apple QuickTime, which does not support MKV — on a Mac, use VLC, or convert to HEIC to MP4 for the most universally compatible clip.
What codec does the MKV use, and can it carry audio?
By default the video track is encoded with H.264, which every modern player handles. Because the source is a silent photo, there is no audio in the output unless you are merging files that include sound; a plain HEIC-to-MKV clip is video-only. MKV itself can hold AAC, MP3, Opus, FLAC, subtitles, and chapters when those tracks exist.
Are my files private, and is there a size limit?
Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared or made public. Individual HEIC photos are small (often 1-3 MB each), so the practical limit is upload time rather than image size; a long slideshow of many photos is the main case where the upload itself takes a while. In our testing, ten 12-megapixel HEIC photos merged at 5 seconds each produced a roughly 30 MB H.264 MKV at the "Very High" preset.