Video Converter

Change any video to the format your phone, TV, editor or website needs. Resize, crop for Reels, rotate, compress or trim along the way. Everything runs privately in your browser.

No upload — 100% private
Fast, lossless when possible
Free & unlimited
Works on iPhone & Android

How to use the Video Converter

1
Add one or more videos — MP4, MOV, MKV, AVI, WEBM, HEVC, 3GP and more.
2
Choose the output format, or tap a device preset like iPhone, WhatsApp or Reels.
3
Open Advanced options to set resolution, aspect ratio, frame rate, rotation or a target file size.
4
Press Convert and download the result.

Fast mode: no re-encoding when it isn't needed

Changing MKV to MP4 or MOV to MP4 usually doesn't need re-encoding, because the video inside is already H.264 or HEVC. In Smart quality mode the converter detects this and remuxes the file in seconds with no quality loss. Pick High, Balanced or Small to force a fresh encode, which you need when changing resolution or making the file smaller.

Plays everywhere: picking the right video format

MP4 (H.264 + AAC) — the universal choice for iPhone, Android, WhatsApp, Instagram, YouTube, TVs and browsers.
MOV — for iMovie and Final Cut on Mac.
MKV — keeps any codec; great for archiving.
WEBM — for websites and HTML5 players.
AVI / WMV / MPG — for older Windows software, DVD players and smart TVs.
3GP — tiny files for old keypad phones.

Helpful guides

4 min readiPhone Video Not Playing on Windows or Android? Fix HEVCWhy iPhone MOV videos show a black screen or 'codec not supported' on Windows, Android and TVs, and how to convert HEVC to H.264 MP4 for…

Frequently asked questions

Why is my iPhone video not playing on Windows or Android?

Recent iPhones record in HEVC (H.265). Convert it to MP4 with any quality other than Smart — the video is re-encoded to H.264, which plays everywhere.

How long does a conversion take?

Fast-copy jobs finish in seconds. Full re-encoding runs on your device's processor, roughly 0.5–2× real time on a modern laptop and slower on phones. Lower resolutions convert much faster.

Can I convert 4K video?

Yes, but re-encoding 4K in a browser is slow. For speed, choose 1080p or 720p in Advanced options.

Is it safe?

Yes. Your video is processed locally. We never see, store or upload it.

Rate this tool

Be the first to rate it.