Video Converter

Convert a video online — free and private

Video formats are a mess. Your phone records one thing, an old camera records another, a download hands you something else, and then the app you actually want to use refuses to open it. Converting the video to a standard format fixes that — and this tool does it right in your browser, without sending your recording to a server. You pick the format you need, tap Convert, and get the new file back.

That last part is the whole point. Most "convert video" sites upload your file to their machines, convert it there, and hand back a download link — which means your footage, whatever is in it, passes through someone else's server. Here nothing leaves your device. The conversion runs locally, so a private recording stays private.

How it works

Upload a video, choose an output format, and tap Convert video. On the first run, the tool loads a one-time video encoder (about 31 MB) into your browser — after that it's cached, so later jobs start straight away. A progress bar keeps you posted while it works. When it's done, you get a result card — with an inline player for MP4 — and can share or download the converted file. Reading the video, re-encoding it, and packaging the result all happen on your own device.

Because the work is local, speed depends on the clip and your hardware. A short video converts in moments; a long or high-resolution one takes more time and memory. On a phone, very long recordings are heavier going than on a computer, so for a very large file a desktop is the smoother choice.

What goes in, and what you get out

It accepts the video formats people actually have: MP4, MOV (the format iPhones record in), WebM, MKV, AVI, M4V and more. You can convert to two output formats, each suited to a different job:

MP4 (H.264)

The safe default. MP4 with H.264 video plays on virtually any phone, computer, browser, or app, which makes it the right choice when you just need the video to work somewhere it currently doesn't. If you're unsure what to pick, pick MP4.

AVI

A classic container that older Windows software and some editing tools still expect. Choose AVI when a specific program asks for it; for everyday sharing and playback, MP4 is the more universal pick.

Common uses

People convert video to make a clip open in an app that rejected the original, to standardize a pile of mixed-format files into one format, or to produce an AVI an old tool insists on. If you only need the sound and not the picture at all — a lecture, a song, a podcast recorded as video — extracting the audio is far smaller than converting the whole file; our MP4 to MP3 tool does exactly that in your browser too.

A note on quality and size

Converting a video means re-encoding it, so the output isn't a pixel-for-pixel copy of the input — and the file size can go up or down depending on the source and the format you choose. The tool shows the before-and-after size so there are no surprises. If your goal is specifically to make a video smaller rather than change its format, a dedicated compressor is the better fit for that job.

Works on your phone

The tool is built to run in a phone's browser with nothing to install. Pick a video from your library, choose a format, tap Convert, and when it finishes use Share to send the file to Files, Messages, WhatsApp, or any app that takes video — or save it straight to your device. Sharing is the reliable way to keep a file on a phone, so it's the primary action on mobile, with a download option as a fallback.

Privacy: your video never leaves your device

Every step happens inside your browser — the video is read, re-encoded, and repackaged locally, and nothing is uploaded, stored on a server, or seen by anyone else. There's no account to create and nothing to delete afterwards, because the file was never sent anywhere in the first place. For personal footage — a family event, a private meeting, a recording you'd rather not hand to a stranger — that's the difference between converting a video and uploading it to an unknown server to do the same job.

Frequently asked questions

Which formats can I convert between?

You can bring in MP4, MOV (iPhone video), WebM, MKV, AVI, M4V and more, and convert to MP4 or AVI.

Which output format should I choose?

MP4 for the widest compatibility — it plays almost everywhere — and AVI when a specific older program asks for it. When in doubt, MP4.

Why is the first conversion slower?

The video encoder (about 31 MB) downloads once on your first conversion, then it's cached. After that, speed depends on the video's length and resolution and on your device.

Is my video uploaded to a server?

No. Everything runs in your browser — your video never leaves your device, and nothing is stored or sent anywhere.