Convert M4V to MP4 without uploading it

M4V is Apple’s variant of MP4, produced by iTunes and some Mac apps. MP4 is the most widely supported video container in the world, playable on every phone, browser, TV and editing app. Switch from one to the other on your own device: drop the file, click convert, download.

Runs on your device No watermark No sign-up No size limit

Drop your files here

or click to choose files. Drop several to process them all with the same settings.

Stays on your device, nothing is uploadedMP4, MOV, MP3, WAV, M4ANo size limit

Why convert M4V to MP4? Because some apps refuse the extension even though the inside is nearly identical to MP4, while it plays everywhere without extra software. M4V files usually contain H.264 video with AAC audio; MP4 expects H.264 or HEVC video with AAC audio.

When the video and audio codecs inside your M4V file are already accepted by MP4, the conversion only rewrites the container. That is a remux: no quality is lost and even a multi-gigabyte file finishes in seconds. If a codec is not accepted, that stream is re-encoded on your device at a bitrate matched to the original.

M4V and MP4 share the same structure; this conversion rewrites the header so picky apps accept the file.

How to convert M4V to MP4

Drop the M4V file. It is read straight from your disk. Nothing is uploaded, so there is no waiting and no file size cap.
Keep MP4 selected. Leave “maximum compatibility” on so the result plays everywhere, or turn it off to always copy the streams unchanged.
Convert and download. Preview the result and save it. The original file is untouched.

Why use myownvid for this

Nothing is uploaded

The file is read straight from your disk and processed by your browser. There is no server, so there is nothing to leak, store or delete.

Faster than any upload

Your device’s hardware encoder does the work. No queue, no upload bar, no waiting for a download afterwards.

No watermark, no account

Every tool is free with no sign-up, no export cap, no resolution limit and no logo stamped on your video.

Presets that match real limits

Discord, WhatsApp, email, Reels: pick the destination and the settings are already right.

Questions people ask

Does converting M4V to MP4 lose quality?

Not when the codecs already fit: the video and audio data is copied byte for byte. Only streams that MP4 cannot hold are re-encoded, and then at a bitrate matched to the original.

How long does M4V to MP4 take?

A remux of a one-gigabyte file takes a few seconds on any recent laptop. Re-encoding runs at several times real-time speed on hardware encoders.

Is it really free with no upload?

Yes. The page is a static website and the conversion runs inside your browser using its built-in video engine. Your M4V file never leaves your device, which is also why there is no watermark, no account and no size limit.

Can I convert several M4V files?

One file at a time for now. After downloading, click “Start over with another file” and drop the next one. Batch conversion is on the roadmap.